HOP LUC CONSTRUCTION JOINT STOCK COMPANY DESCRIPTION OF CONSTRUCTION DRAWING DESIGN (MECHANICAL ELECTRICAL PART) PROJECT HOUSING COLONY (OM ACCOMMODATION) VUNG ANG II COAL FIRED THERMAL POWER PLANT PROJECT LOCATION LOT CT3 KY LONG URBAN AREA KY LIEN KY PHUONG, VUNG ANG ECONOMIC ZONE, KY ANH TOWN, HA TINH PROVINCE PROJECT OWNER VUNG ANG II THERMAL POWER LIMITED LIABILITY COMPANY (VAPCO) CONTRACTOR PACIFIC CORPORATION JOIN STOCK COMPANY CONSULTANT HOP LUC CONSTRUCTION JOINT STOCK COMPANY DO.
WATER SYSTEM
Code & Standard
No Code & Standard Number Description
National technical regulation on classification and decentralization of civil, industrial and urban technical infrastructure
2 QCVN 07:2010/BXD National technical regulation for urban technical infrastructure works
3 QCVN14:2008/BTNMT National technical regulation on domestic wastewater
4 QCXDVN 1999 Regulation on water supply and drainage systems in houses and buildings
5 TCVN7957-2008 Drainage - External networks and structures
7 TCVN 4513:1988 Internal water supply - Design standards
8 TCVN 4474:1987 Internal drainage - Design standards
9 TCXDVN 51:2008 Drainage, external network and works
10 QCVN01:2008/BXD Vietnam Construction Code
11 TCVN 4513-88 Water supply inside Design standards
12 TCXDVN 33:2006 Water supply, external network and works
The documents on water supply and drainage pipes are used according to ISO
Family Apartment
Roof rain drainage: Use unplasticized Polyvinyl Chloride (uPVC) type of class 3 pipes placed in a technical box
Water is sourced from underground tanks and pumped into stainless steel tanks situated on the apartment roof These rooftop tanks are organized into two groups, each containing two 5m³ tanks The water stored in these tanks is then distributed to the sanitary fixtures throughout the building.
5 water supply pipe uses polypropylene random copolymers with pressure nominal
Hot water supply: use tankless water heater for each bathroom
For effective wastewater drainage in residential settings, it is essential to utilize class three (03) uPVC plastic pipes bonded with adhesive Drain branch pipes should be installed for latrines, washbasins, urinals, and showers, maintaining a 2% slope towards vertical drainage pipes leading into the septic tank.
Septic tank: arrange four (04) septic tanks outside the house; capacity of 6.5 m 3 /tank The tank bottom is made of reinforced concrete, brick wall & waterproof cement mortar made of specialized materials.
Manager house
For effective roof rain drainage, utilize class 3 uPVC pipes installed within a technical box Water supply is managed by pumping from underground storage tanks to an Inox tank situated on the building's roof, ensuring adequate provision for apartment usage with a capacity of 1.0 m³ per tank for each house The cold water supply is facilitated through PPR PN10 pipes.
Hot water supply: installation of 200 liters solar water heater In case it rains, there is no sunlight, use an auxiliary resistor to boil water for each house
In residential wastewater drainage systems, uPVC class three (03) plastic pipes are utilized, securely bonded with adhesive The drainage branch pipes for latrines, washbasins, urinals, and showers are designed with a 2% slope, directing waste towards the vertical drainage pipes and ultimately into the septic tank.
A septic tank, typically located beneath the toilet inside the house, has a capacity of 3m³ for each residence Constructed with a reinforced concrete base and brick walls, the tank is sealed with waterproof cement mortar made from specialized materials to ensure durability and efficiency.
Multifunction house
For effective roof rain drainage, utilize class 3 uPVC pipes installed within a technical box Additionally, the water supply system involves pumping water from underground tanks to stainless steel tanks situated on the apartment roof, ensuring a reliable and efficient water distribution.
6 will be supplied to the sanitary equipment Rooftop water tank with a capacity of 5m 3 , one (01) tank quantity; Cold water supply pipe uses PN10 PPR pipes
When installing wastewater drainage systems in a home, it is essential to use class three (3) uPVC plastic pipes bonded with adhesive The drain branch pipes for latrines, washbasins, urinals, and showers should be installed with a 2% slope toward the vertical drainage pipes, directing wastewater efficiently into the septic tank.
For optimal waste management, install a septic tank with a capacity of 6.5 m³ outside the house This tank should feature a reinforced concrete bottom, brick walls, and waterproof cement mortar crafted from specialized materials to ensure durability and efficiency.
Supermarket and restaurant
Roof rain drainage: Use uPVC ( unplasticized Polyvinyl Chloride) type of class
3 pipes placed in a technical box
The water supply system consists of underground tanks that pump water into three stainless steel rooftop tanks, each with a capacity of 4m³, supplying water to sanitary fixtures through PPR PN10 pipes Wastewater is managed using class 3 uPVC drainage pipes, which are bonded with adhesive, ensuring proper drainage from latrines, washbasins, urinals, and showers These drain branch pipes are designed with a 2% slope directing wastewater toward vertical drainage pipes and into the septic tank.
Septic tank: arrange three (03) septic tanks outside the house; capacity of 6.5 m 3 /tank The tank bottom is made of reinforced concrete, brick wall & waterproof cement mortar made of specialized materials
Grease trap tank 15m 3 shall be built
Park house
Roof rain drainage: Use uPVC type of class 3 pipes placed in a technical box.
Main gate & Guard house
Roof rain drainage: Use uPVC type of class 3 pipes
The water supply system involves pumping water from underground tanks to a stainless steel tank installed on the roof of the apartment This rooftop tank, with a capacity of 1m³, ensures a reliable supply of water to the sanitary equipment The cold water supply is facilitated through PPR PN10 pipes, ensuring safety and efficiency in the distribution of water.
When constructing a wastewater drainage system in your home, it is essential to use uPVC class 3 plastic pipes bonded with adhesive for optimal performance Ensure that drain branch pipes for latrines, washbasins, urinals, and showers are installed with a 2% slope directing wastewater toward vertical drainage pipes and into the septic tank This setup promotes efficient waste removal and helps maintain a hygienic environment.
Septic tank: arrange one (01) septic tanks outside the house; capacity is 3 m 3 /tank The tank bottom is made of reinforced concrete, brick wall & waterproof cement mortar made of specialized materials
Secondary gate
Roof rain drainage: Use uPVC type of class 3 pipes
The water supply system involves pumping water from underground tanks to stainless steel tanks situated on the apartment roof These rooftop tanks, each with a capacity of 1m³, ensure a reliable supply of water to the sanitary fixtures The cold water supply is facilitated through PPR PN10 pipes, ensuring safety and efficiency in the distribution of water.
For effective wastewater drainage in residential settings, it is essential to utilize uPVC class 3 plastic pipes bonded with adhesive The drainage system should include branch pipes for latrines, washbasins, urinals, and showers, all designed with a 2% slope directing flow towards vertical drainage pipes that lead into the septic tank.
Septic tank: arrange one (01) septic tank outside the house; capacity is 3 m 3 /tank The tank bottom is made of reinforced concrete, brick wall & waterproof cement mortar made of specialized materials
Substation & Pumping station
Roof rain drainage: Use uPVC type of class 3 pipes placed in a technical box.
Water supply and drainage system outside the house
Leveling for rainwater drainage: Leveling is based on the leveling of the 1/2000 plan and approved detailed planning project with scale of 1/500 The leveling level is +13.00m
Ditch drainage features a rectangular design with apertures B400, B500, B600, and B800, topped with reinforced concrete lids It is installed with a vertical slope ranging from 0.15% to 0.7% along sidewalks, positioned 1.0 to 1.5 meters away from the road's edge.
The manhole system features dimensions ranging from 500x500mm² to 700x700mm², with a spacing of 30 meters between each manhole Constructed from unburnt bricks with a thickness of 220mm, the structure is finished with cement mortar of grade 75mm The foundation consists of reinforced concrete of grade 200, measuring 150mm in thickness, and is supported by a 4x6mm² stone foundation that is tilted at 200mm Additionally, the manhole cover is reinforced with concrete of grade 200 and is 100mm thick, ensuring durability and stability.
Domestic wastewater is processed in a septic tank and transported via a uPVC D200 wastewater collection pipeline, with the D315 pipeline directing it to the wastewater treatment plant After treatment, the wastewater complies with the standards set by column A of QCVN 14:2008 from the Ministry of Natural Resources and Environment, ensuring it is safe for discharge into the urban drainage network.
The domestic wastewater treatment station has a capacity of 150 m³ per day and night, ensuring that the treated water quality complies with QCVN 14: 2008/BTNMT (column A) The facility utilizes activated sludge technology, employing a microbiological technique that adheres to a moving bed biofilm reactor (MBBR) for effective treatment.
Equipment: Wastewater treatment plant is a composite plastic block equipment, placed across the dirt trench, under the grass
The water supply is sourced from a DN200 pipeline along National Highway 1A, utilizing a D90 overall flow meter This water is first directed into underground storage tanks, from which it is subsequently pumped to the rooftop tanks for distribution.
The water supply pumps have been installed indoors, including:
- One (01) water pump (P1) type CM50-200A-15kW capacity; 50m3/h, height H = 50m
- One (01) water pump (P2 backup) CM50-200A-15kW; 50m3/h, height H = 50m
- Water supply distribution pipeline uses HDPE PN16 pipes (High Density Polyethylene from D25 to D90 along the internal road connecting the pump to the buildings.
Calculation water supply and drainage system outside
Demand for domestic water supply for employees:
- 100 liter/person/day and night
For more details, see calculation sheet 1.10.1
1.11.2 Calculation of underground water tank
Wbc: capacity of regulating the amount of domestic water of water tank (m 3 )
Qsh: capacity of day water (m 3 )
For more details, see calculation sheet 1.10.1
The pump station is calculated to ensure sufficient water supply at the maximum hour of water use Maximum capacity of day water supply: ng.max ng *K
Q : Capacity for maximum day of water use
Water supply capacity for maximum hour of water use:
Q h max : Capacity for maximum hour of water use
Q ng max : Capacity for maximum day of water use
max max : Hour aperiodic coefficient (look up the standard table 33-
For more details, see calculation sheet 1.10.1
1.11.3 Height of delivery pressure head
H = Hhh + hb + hdd + hcb + htd + hdp
Hb: Pressure loss through pump (m)
Htd: Required pressure of the device
For more details, see calculation sheet 1.10.4
1.11.4 Calculation of water tanks on the roof
Q ketmai : Roof water tank capacity (m 3 )
Q ng : Day water supply capacity (m 3 /day and night)
For more details, see calculation sheet 1.10.5
1.11.5 Hydraulic calculation of water supply
N: Total sanitary equivalent in the calculated section α: functional dependency coefficient of toilet area (=2.5)
For more details, see calculation sheet 1.10.6
Each type of sanitary device has a certain drainage equivalent, shown in Table 7.3: Drainage equivalent of sanitary device (QC 47/1999/QD-BXD)
The minimum dimensions for vertical or horizontal drains should be based on the total equipment equivalents For vertical drains, it is essential to ensure that their length is suitable, as outlined in Table 7.5 of QC 47/1999/QD-BXD, which details the drainage equivalents of sanitary devices, including the maximum lengths for drains and air pipes.
1.11.7 Calculation of roof rainwater drainage
Calculated water capacity of the roof rainwater drainage system is determined by the formula:
The rain intensity, measured in liters per second per hectare (l/s.ha), is determined for a specific locality with a rainfall duration of 5 minutes and an intensity exceeding the calculated value by one year The criteria for selecting rainwater catchment systems are detailed in Table 11-1 of the Regulations on Domestic and Construction Drainage Systems No 47/1999/QD-BXD.
1.11.8 Calculation of infrastructure rainwater drainage network
Rainwater drainage system is calculated according to the method "Limit strength" as specified in the regulation TCXD 7957-2008
According to this method, rainwater capacity of sewer sections is calculated by the formula:
Q: calculated capacity of drainage sewer sections under consideration (l/s)
F: Area of basin served by the sewer line (ha) q: Calculated rain intensity(l/s.ha)
Calculated rain intensity is determined by the formula: q = n b t
In which: q - Rain intensity (l/s.ha)
P - Period of repeating rain calculation (sewer spillover period) in years, choosing P = 5 years t - Rain flow time (minutes)
A, C, b, n – Parameter is determined by the local rain condition (According to the Appendix table B.1: Climatic constant in the formula of rain intensity of some cities in TCVN 7957:2008)
1.11.9 Calculation of septic tank capacity
The project's septic tank capacity can be calculated as follows:
Wn : water volume of septic tank
Wn= tn * Q tn: wastewater retention time of septic tank tn=1 if Q>15m 3 /day and night tn=2 if Q15m 3 /day and night
Wb : sediment volume of the tank (m 3 ) is calculated according to the following formula:
The average sediment discharge per person is estimated at 0.5 to 0.8 liters per day During fermentation, a reduction in sediment volume is achieved with a coefficient of 0.7, indicating a 30% decrease Additionally, when extracting sediment to preserve microorganisms for an accelerated fermentation process, a coefficient of 1.2 is applied, which allows for 20% of the fermented sediment to remain.
N: Number of persons served by the tank
T: Time between two times of taking sediment in 180 days (6 months) W1, W2: Moisture of fresh sediment entering the tank and in case of fermentation, respectively as 95% and 90%.
Calculation of domestic wastewater treatment system
Average wastewater volume per day:
Average volume of wastewater per hour:
Pollution parameters calculated at treatment station input:
- Ammonium input concentration 60 mg/liter
- Concentration of Total Nitrogen input 80 mg/liter
- Water temperature in the tank: 20 0 C
- Maintained sludge concentration in the tank: Xtk = 5000 mg/l
- The treated water meets column A QCVN 14:2008/BTNMT
Collecting all domestic wastewater, pump to transfer wastewater into the conditioning tank of the wastewater treatment system
Selecting the water retention time in the collecting tank to be 0.25 hours
V = Qmax * t = 15,63 * 0,25 = 3,91 m3 The tank sizes are as follows:
Selecting the useful height of the tank hc = 1 (m)
Selecting the protection height of the tank hbv = 2,5 (m)
So the total height of the tank
Ht = hc + hbv = 1 + 2,5 = 3,5 (m) Selecting the width of the tank surface: B = 2 (m)
Selecting the length of the tank surface L = 2 (m)
The dimension of collecting tank construction:
1.12.3 Calculation of the conditioning tank
The conditioning tank with the effect of regulating the flow and concentration of pollutant in the wastewater
Selecting the water retention time in the conditioning tank t = 13.25 hours
The useful volume of the conditioning tank:
V = Q * t = 6.25 * 13.25 = 82.81 (m 3 ) Selecting the useful height of the tank hc = 3.1meters(m)
Selecting the protection height of the tank hbv = 0.4 (m)
So the total height of the tank:
Ht = hc + hbv = 3.1 + 0.4= 3.5(m) Selecting the tank width: B = 4.4 (m)
1.12.4 Calculation of the anoxic tank
Heterotrophic microorganism kinetic constant at 20 0 C
(Table 9.6 - Treatment of wastewater rich in N and P compounds - Le Van Cat)
Heterotrophic microorganism kinetic constant at 20 0 C (Table 9.6) (Le Van Cat) gBOD gSKHH
Calculating the maximum growth rate of Nitrosomonas bacteria:
Calculating the minimum retention time for oxidation:
→ Calculating the design cell retention time with a factor of safety of 2 and a coefficient of variation of 1.5 :
= Calculating the cell retention time of both aerobic and anoxic systems :
(Selecting the reaction volume of anoxic tank from 20 to 40% of reaction tank volume, here we choose 40%)
Calculating the concentration of ammonium consumed by heterotrophic microorganism for cell synthesis
Xe is the density of microorganism after settling (50 mg/l) The effective concentration of microorganism accounts for 75% of the total
Fn = 0,12 (Assuming that the nitrogen content in the cell accounts for 12%)
Calculating the concentration of ammonium after treatment:
Total amount of nitrogen in anoxic tank:
Calculating the concentration of nitrate returned to the anoxic tank from the backflow streams:
(where includes 1Q input, 1Q sludge circulation, 1.5Q water recirculation back from the aerobic tank)
Calculating the amount of oxygen equivalent to nitrate from the mixed muddy water recirculation flow (selecting 2Q sludge and water circulation flow) :
Calculating the amount of nitrate from the sludge - water and sludge backflow flow back to the anoxic treatment tank 1:
: Nitrate concentration after treatment in the settling tank: selecting equal to 0 mg/l
Total amount of nitrate must be treated
So the volume of anoxic tank at level 1:
Selecting the useful height of the tank hc = 3.2 meters(m)
Selecting the protection height of the tank hbv = 0.3 (m)
So the total height of the tank
Ht = hc + hbv = 3.2 + 0.3= 3.5(m) Selecting the anoxic tank length: L = 3.2 (m)
The dimension of anoxic tank construction:
NO = vào − ra − sk − = 80 − 20 − 14 , 95 − 0 , 88 = 44 , 17 / lit
The volume of aerobic tank 1 is calculated by the formula:
Ys = 0,6/0,75 = 0,8 due to the value of 0.6 caculated in terms of existing biomass
Selecting the useful height of the tank hc = 3,2meters(m)
Selecting the protection height of the tank hbv = 0,3 (m)
So the total height of the tank
Ht = hc + hbv = 3,2 + 0,3 = 3,5 (m) Selecting the aerobic tank length level 1: L = 3,2(m)
The dimension of aerobic tank construction:
(The F/M ratio is within the range of 0.2-0.6 kg/kg.day according to Metcalf and Eddy, 2003)
Qin: the flow into the settling tank;
The area of biological clarifier
The useful height of the tank hc = 2,53 (m)
The protection height of tank hbv = 0,3 (m)
The sludge storage height of tank hcb = 0,67 (m)
Ht = hc + hbv + hcb = 2,53+ 0,3 + 0,67= 3,5 (m) The square clarifier, side A = 3,7x3,7 (m)
The size of the biological clarifier is:
1.12.7 Calculation of sludge separation of biological clarifier
Selecting the volume of the sludge separation to match the building block
Construction volume of biological sludge separation :
1.12.8 Calculation of the MBR membrane tank
Selecting the useful height of the tank: hc = 3,1 (m)
Selecting the protection height of the tank: hbv = 0,4 (m)
In order to match the treatment system architecture we select:
Selecting the useful height of the tank: hc = 3 (m)
Selecting the protection height of the tank: hbv = 0,5 (m)
In order to match the treatment system architecture, we divide the sterilization tank into 2 compartments:
POWER SYSTEM
Code & Standard
No Code & Standard Number Description
1 QCVN 06: 2020/BXD National technical regulation on fire safety for houses and buildings
2 QCVN 09:2017/BXD National technical regulation on energy efficient construction works
3 QCVN 12: 2014/BXD National technical regulation on electrical system of housing and public works
National technical regulation on electrical engineering, volume 8: Technical regulations on low voltage
5 11 BC 18 ~ 21:2006 Electrical equipment regulations I, II, III,
6 TCVN 9206:2012 Place electrical equipment in houses and public works - Design standards
7 TCVN 9207:2012 Installation of electrical lines in houses and public works - Design standards
TCVN) Electrical installations of buildings
9 TCVN 9385:2012 Lightning protection for constructions -
10 TCVN 9888:2013 Lightning protection parts I, II, II, IV
11 TCVN 7114-1:2008 Ecgonomi - Workplace lighting - Part 1: In the home
Ecgonomi - Workplace lighting - Part 3: requires safe lighting and protection of outdoor workplaces
Artificial lighting outside public works and urban infrastructure engineering - Design standards
14 Cables IEC 60502 Power cables with extruded insulation and their accessories for rated voltages
15 IEC 60228 Conductors of Insluated Cables
16 Transformer IEC60076-1 Power transformers - General
17 Switchboard IEC 61439 A new standard on Switchgear and
18 Diesel IEC 60034 Rotating electrical machines
Protection of structrures and open areas against lightning using Early Streamer Emission air terminals
Design principles and objectives
Power system shall be designed for purposes as the following:
- Meet the latest energy and environmental assurance standards implemented using recent technologies in electrical design in combination with architectural and mechanical designs
- Minimizing electricity consumption in buildings during the operation phase, using various techniques to minimize loads, maximize the use of natural energy with highly efficient systems introduced
- Reliability, safety, operation in accordance with the scale of the project
- Combine backup and recovery for power distribution system to operate important equipment and ensure user comfort
- Easy to maintain and operate, minimizes lifecycle costs - Operate and maintain with minimal personnel and maintenance service.
Scope of Work
Design works for power system will be consisted of items as below:
- Design of power supply system
- Grounding and lightning protection system design
Design Solutions
The project is powered from two sources ensuring uninterrupted power supply:
The project draws its power from the 35kV medium voltage grid, supplying it to a transformer station with a capacity of 750kVA-35(22)/0.4kV This transformer is a medium-voltage two-level type, designed to serve as a backup during the transition from the 35kV grid to a 22kV system in the future.
To ensure continuous power supply, use one(01) backup generator with capacity of 750kVA-400/230V
The main mains and defense sources are interconnected and managed through a predetermined mode via an automatic transfer switch (ATS) for the installation of the low voltage cabinet of the main switchboard (MSB) Power is supplied from the MSB to work items using 0.6/1kV Cu/XLPE/PVC underground copper cables, which are encased in HDPE pipes and buried at a depth of 0.8 to 1 meter directly in the ground.
2.4.2.1 High voltage grid infrastructure (35kV)
The project involves the construction of one overhead transmission line (DDK) and a 35kV underground cable to establish a power supply connection The route will feature 16m centrifugal concrete columns, utilizing AC95 conductors supported by insulating porcelain Additionally, the underground cable will consist of a 35kV Cu/XLPE/PVC/DSTA/PVC 3x50mm² vertical waterproof configuration, linking the DDK power grid to the substation For grid management, Reclose line breakers and isolation breakers will be employed.
2.4.2.2 Low voltage grid infrastructure (0,4kV)
The electrical system operates at a voltage of 400/230 VAC with three phases and five wires, including a neutral and an earthing wire, where the rated voltage is 380 VAC and the allowable voltage drop (ΔU) is less than 5% The infrastructure includes low-voltage cabinets and substations, utilizing underground cables rated at 0.4kV, along with 0.6/1kV Cu/XLPE/PVC cables housed in HDPE pipes, which are directly buried in the ground These underground cable lines primarily run along pavements and beneath roads, connecting to the electrical engineering offices situated within the project site.
Transformer and power generation stations are designed as indoor equipment facilities, comprising three distinct areas: the medium voltage equipment room, the transformer room, and the MSB general low voltage cabinet room, along with a dedicated generator room.
- Transformer capacity 750kVA-35/0.4 kV-three (03) phases, four (04) wires, frequency 50Hz
To ensure effective switching and protection on the medium voltage side, it is essential to utilize an isolated breaker equipped with a 35kV fuse This setup should be connected to the transformer using a 35kV underground cable, specifically a 3x50mm² configuration made of Cu/XLPE/PVC/DSTA/PVC materials.
- Protection against lightning: Lightning protection using lightning protection valve Zno 35KV
- MSB low voltage cabinet, IP42 indoor cabinet, 600V-1250A-70kA/s
- Switching and protecting the low-voltage side using MCCB 1250A-70kA/s, lightning protection using lightning protection valve GZ-500
- Connection between the transformer and the MSB cabinet uses 0.6/1 kV cable on the floating cable ladder
- The transformer is an oil immersed transformer with oil volume of 686 Kg, and oil density at 20 0 C of 0.872 Kg/l, requiring an oil collecting pit of 0.6 m3
The substation equipment is grounded according to standards and grounded at the substation: using a mixture including beam spindles connected to a closed loop circuit
Ground piles are constructed using D16 copper-plated steel piles, measuring 2.4m in length and 0.8m in depth, interconnected with M70 bare copper cables through exothermic welding It is essential for the ground resistance (Rtđ) to remain below 4 ohms throughout the year, and measurements must be taken upon project completion If the resistance does not meet the required standard, additional piles or chemical treatments may be necessary The connection from the ground to the equipment should utilize Cu/PVC cables, with cross-sections tailored to each specific device.
A 750kVA diesel backup generator, operating at 400/230VAC and 50Hz, features a bottom oil tank design It is integrated with an Automatic Transfer Switch (ATS) in the Main Switchboard (MSB) cabinet to ensure seamless backup power for the project The generator automatically activates when mains power is lost, as per the installation settings Additionally, grounding is implemented with transformer stations to ensure safety and reliability.
The project incorporates an advanced lightning protection system featuring early streamer emission devices It utilizes three lightning rods with a protection radius of 109 meters, classified as level II These rods are securely connected using stainless steel couplers and pedestals atop steel columns, ensuring durability against severe weather conditions Positioned on the building's roof, the system provides effective protection classified as class II Detailed protection radius specifications for each house can be found in the design drawings.
Arrangement of lightning counters to check the operation of lightning rods, this device is activated in case of lightning impulse current from 250A
To ensure the safe and efficient conduction of lightning for the building, two copper cables are arranged with a lightning conductor and down conductor at each lightning rod location, as detailed in the accompanying drawing The down conductor features a cross-sectional area of 70mm², facilitating rapid lightning discharge to the grounding system from the roof.
Copper coated steel piles, linking copper cable 70mm 2 and linked piezothermal connectors are arranged according to grounding system consisting of many electrodes
The D16 copper-coated steel grounding pile, measuring 2.4 meters in length and buried 4.0 meters apart, is designed to dissipate lightning energy safely and efficiently It features a connection of 70mm² copper cable with piezothermal connectors, with the upper end of each pile driven 1.0 meter underground and the bare copper cable placed in a 0.5-meter gutter that is 1.10 meters deep This setup ensures a resistance of less than 10 ohms for the grounding system, complying with Vietnamese lightning protection standards The high conductivity between the piles, copper tape, and down conductor enhances durability, eliminating the need for periodic maintenance that traditional systems require.
Earth inspection housing is used to monitor and periodically check the value of ground resistance monthly, quarterly and annually
When the construction is completed, it is necessary to conduct measurement and inspection If not meeting the requirements, must proceed to add additional piles or pour chemical Gem
2.4.5 Indoor and outdoor traffic lighting
Indoor traffic infrastructure and external landscaping are designed with compliant lighting standards For roads wider than 12 meters, the average glare is set at 1 cd/m², while roads ranging from 7.5 to 11 meters have an average glare of 0.8 cd/m² For roads narrower than 7.5 meters, the average luminance is maintained at 0.6 cd/m².
Road lighting: Lighting uses outdoor steel pillar with single and double lever with height than 9m, thick than 3mm, rod length 1.5m, LED power 100W
For optimal lighting of landscapes and sports fields, utilize garden lights featuring single pillar lamps that are taller than 4.7 meters and have a thickness exceeding 3mm Additionally, consider installing fixtures with three bulbs positioned at a height of 5 meters, along with single-arm street lights that reach heights of 8 to 9 meters.
The power supply infrastructure features lighting cables encased in HDPE twisted plastic pipes, buried 0.5 to 0.8 meters from the pavement edge This lighting system is managed by time-controlled electrical cabinets, ensuring efficient operation and reliability.
The lighting system is efficiently managed through specialized cabinets equipped with a dual-mode switching mechanism for both summer and winter To ensure safety, the grounding system is meticulously designed with a resistance of less than 10 ohms, utilizing 2.5-meter long copper-coated steel piles for each grounding position These grounding poles are strategically placed near the columns, with all columns of the electrical cabinet interconnected by bare copper wire M10.
2.4.6 Power supply for the project
The project is powered by power from the transformer station, each project has one to two total electrical cabinets and each building has separate functional areas
The project mainly uses cables type of CXV/DSTA, Cu/XLPE/DSTA/PVC, CXV/FR, Cu/PVC, as follows:
Appendix calculations
The overall project capacity has been calculated according to current standards and the specific needs and loads of each item, as detailed in the table below For comprehensive load information on each item, please refer to the attached appendix.
Appendix 0.0 The spreadsheet of capacity of MSB Main Distribution Board and transformer
Name of Distributi on Boards
1 Load for family apartment 1 DB-F1 252.5 252.5 252.5 0.85 3P 451.80 1.25 564.75 MCCB 630A
2 Load for family apartment 2 DB-F2 252.5 252.5 252.5 0.85 3P 451.80 1.25 564.75 MCCB 630A
3 Load for managing house Manage 1 DB-QL1 64.92 64.92 64.92 0.85 3P 116.18 1.25 145.22 MCCB 150A
4 Load for managing house Manage 2 DB-QL2 64.92 64.92 64.92 0.85 3P 116.18 1.25 145.22 MCCB 150A
5 Load for multi- purpose building DB-TT 20.57 20.57 20.57 0.85 3P 36.82 1.25 46.03 MCCB 50A
6 Supermarket and restaurant load DB-CT 100.70 100.70 100.70 0.85 3P 180.21 1.25 225.26 MCCB 250A
7 Security house load DB-BV 29.58 29.58 29.58 0.85 3P 52.93 1.25 66.16 MCCB 80A
8 Substation & pump station load DB-TBA 12.40 12.40 12.40 0.85 3P 22.19 1.25 27.74 MCCB 32A
9 Domestic pump load DB-WP 16.05 16.05 16.05 0.85 3P 28.72 1.25 43.08 MCCB 50A
10 Load for waste water treatment station
11 Fire protection and fighting pump load DB-FP 114.00 114.00 114.00 114.00 0.85 3P 204.01 1.80 367.22 MCCB 400A
DESIGN CAPACITY OF DISTRIBUTION BOARD Pr = 832.26 (kW)
DESIGN CAPACITY OF MSB Ptt = 582.58 (kW)
DESIGN CAPACITY OF TRANSFORMER Stt= 712.05
2/ LOW VOLTAGE CUTTING MACHINE SELECTION FOR MSB BOARDS
DESIGN CAPACITY OF MSB BOARDS S = 750,00 (kVA)
NOMINAL VOLTAGE OF MSB U = 0,40 (kV)
CALCULATING CURRENT FOR CIRCUIT BREAKER Itt = 1.082,56 (A)
SAFETY FACTOR FOR CIRCUIT BREAKER k = 1,10
DESIGN CURRENT FOR CIRCUIT BREAKER Icb = 1.190,82 (A)
Note Note: The capacity of the fire pump is not included in the calculated capacity of the substation
EXTRA LOW VOLTAGE SYSTEM
Code & Standard
No Code & Standard Number Description
National technical regulation on lightning protection for telecommunication stations and outside cable network
2 QCVN 09:2016/BTTTT National technical regulation on earthing of telecommunication stations
National technical regulation on electrical safety of Telecommunications Terminal Equipments
ElectroMagnetic Compatibility (EMC) - Telecommunication network equipment- ElectroMagnetic compatibility requirements
5 TCXD 175-2005 Permissible noise level in public works
6 TCVN 4510: 1988 Sound studio Architectural sound technical requirements
7 TCVN 4511: 1988 Sound studio Building sound technical requirements
8 TIA/EIA-568-B.2-2 Commercial Building Telecommunications
Cabling Standard - Part 2: Balanced Twisted- Pair Cabling Components - Addendum 2 (ANSI/TIA/EIA-568-B.2-2-2001)
9 TIA/EIA-568-B.2-3 Commercial Building Telecommunications
Cabling Standard - Part 2: Balanced Twisted- Pair Cabling - Addendum 3 - Additional Considerations for Insertion Loss and Return Loss Pass/Fail Determination
10 EIA/TIA-568 Commercial Building Wiring Standard
11 TIA/EIA-568-A Commercial Building Wiring Standard
(superceded by TIA/EIA-568-B series)
12 TSB-75 Additional Horizontal Cabling Practices for
Open Offices (superceded by TIA/EIA-568- B.1, TIA/EIA-568-B.2, and TIA/EIA-568- B.3)
13 TIA/EIA-568-A-1 Commercial Building Wiring Standard,
Addendum 1 - Propagation Delay and Delay Skew Specification for 100 Ohm 4-pair Cable (superceded by TIA/EIA-568-B series)
14 TIA/EIA/IS-729 Technical Specifications for 100 Ohm
Screened Twisted-Pair Cabling (superceded by TIA/EIA-568-B.1, TIA/EIA-568-B.2, and TIA/EIA-568-B.3)
15 TIA/EIA-568-B.2 Commercial Building Telecommunications
Cabling Standard - Part 2: Balanced Twisted Pair Cabling Components (ANSI/TIA/EIA- 568-B.2-2001)
16 TIA/EIA-568-B.1 Commercial Building Telecommunications
Cabling Standard - Part 1: General Requirements (ANSI/TIA/EIA-568-B.1-2001
17 TIA/EIA-568-B.1-1 Commercial Building Telecommunications
Cabling Standard - Part 1: General Requirements - Addendum 1 - Minimum 4- Pair UTP and 4-Pair ScTP Patch Cable Bend Radius (ANSI/TIA/EIA-568-B.1-1-2001)
18 TIA/EIA-568-B.2-4 Commercial Building Telecommmications
Cabling Standard - Part 2: Balanced Twisted Pair Components - Addendum 4 - Solderless Connection Reliability Requirements for Copper Connecting Hardware
19 TIA/EIA-568-B.2-1 Commercial Building Telecommunications
Cabling Standard - Part 2: Balanced Twisted Pair Components - Addendum 1 -
Transmission Performance Specifications for 4-Pair 100 Ohm Category 6 Cabling
Cabling Standard - Part 1: General Requirements - Addendum 2 - Grounding and Bonding Requirements for Screened Balanced Twisted-Pair Horizontal Cabling
Cabling Standard - Part 2: Balanced Twisted Pair Cabling Components - Addendum 6 - Category 6 Related Component Test Procedures (ANSI/TIA-568-B.2-6-2003)
Cabling Standard - Part 1: General Requirements - Addendum 5 - Telecommunications Cabling for Telecommunications Enclosures (ANSI/TIA- 568-B.1-5-2004)
23 TSB-40-A Additional Transmission Specifications for
Unshielded Twisted-Pair Connecting Hardware (superceded by TIA/EIA-568-A)
Scope Of Work
- Data network system, Internet Protocol (IP) phone design
- Internet Protocol (IP) television system design
- Security camera system and security alarm around fence wall design
- Public sound system and functional sound for each zone
Design Solution
3.3.1 Data network, Internet Protocol (IP) phone system
The incoming communication cable point will be strategically situated near the project gate and guard house, while the Optical Distribution Frame (ODF) cabinet will be installed at the guard house to facilitate the distribution of connections to various functional areas within the project.
3.3.1.2 Indoor and outdoor cable infrastructure
The outdoor infrastructure includes a connection point with the service provider, featuring cable infrastructure at the ODF cabinet located in the guard room The project utilizes rack cabinets equipped with four core fiber optic (4Fo) Single Mode cables, which are threaded through HDPE pipes buried underground Additionally, the arrangement of HDPE pipes and cable manholes adheres to the project's traffic infrastructure plan and established standards.
The indoor infrastructure includes a primary rack cabinet that distributes signals to individual apartments, rooms, and functional areas It utilizes either two core fiber optic cables (2Fo) in Single Mode or four unshielded twisted pair Cat6 cables (4UTP) to connect the cable ladder system to small rack cabinets or points of use.
Figure 1 Block diagram of data network system Design solution:
The project features a point-to-multipoint network design, characterized by numerous small, dispersed works It utilizes ODF optical splitters and relies on Single Mode 4Fo cable for its transmission infrastructure.
- Entire network center and server are located in server room of each area Server systems, routers, core switches, and storage systems are not within design scope
- Network has a hierarchical structure according to subdivision back-born model
- Cable - optical cable lines - runs from the center to access switch at the floors, cable is installed in cable tray according to technical boxes
- UTP double twisted copper cable in connected areas according to star diagram UTP 4P Cat6 cable is used to connect from patch panel to outlet
37 located in different areas The cable is installed in hard PVC pipe to go underground to the floor wall or in cable tray
- Plugs use RJ45 jacks mounted in the wall at a height of 0.4 meters from the finished ground
Access switches: the access switches are located in connection cabinets in engineering room of the floor
- Wireless access point: in halls, corridors to arrange wireless access points to provide WLAN services, allowing users to access resources, internet
- Materials such as cables, sockets, distribution cabinets, etc will meet the latest standards and conditions
The cable will be fixed to normal distance and with fixed support to avoid force damage
Connection cabinet for each area, floor:
Connection cabinet is where all data network lines of each floor, each area are gathered The cabinet includes access switches, patch panels and a jumper management bar for the network
Floor connection cabinet is a closed rack with a front door, safety wings and locks
The cabinet includes front perforated and rear perforated doors to ensure good ventilation of the installed equipment
Side of the cabinet is closed with removable panels
All cable fixing accessories, equipment, etc are also included in this section
The cables are carefully held and fixed in the cabinet to ensure a balanced and reasonable distribution according to different sockets
Phone system in the project is an IP phone system, used in combination with data network switches, and used according to the needs and connection structure of service providers
Voice cable lines integrate fiber optic cables with data network systems, utilizing UTP 4P Cat6 cables that run through PVC pipes from the cabinet to the user outlet.
The office features RJ45 jacks as wall-mounted phone sockets, positioned at a height of 0.4 meters above the finished ground Additionally, socket boxes are installed on the floor to enhance connectivity throughout the workspace.
The television system utilizes an IP television solution integrated with a data network infrastructure to receive signals from external providers Terminal equipment is installed and configured based on the specifications of service providers, allowing for the accommodation of local TV channels and the potential addition of more channels.
TV lines from information cabinet to the outlet are the UTP 4P Cat6 cables that run in the PVC pipe to the outlet of the user
An IP surveillance camera system will be installed for the project
Surveillance cameras will be placed in the following locations:
- Each security door (refer to architectural profile's security control plan)
- Each entrance for guests and staff
- Entrance and fence surrounding the project
- Each store, supermarket, multi-function house…
CCTV system including monitor, video recorder and storage drive located in guard house at project gate
Cameras are color IP cameras, fixed type or with rotating, scanning, and zoom functions, depending on the installed location
Fixed camera is PoE IP camera, the power supply and signal transmission use one UTP 4P Cat6 cable Indoor cameras use shell type
Panning/Tilting/Zooming (PTZ) camera is IP type, transmits signal via UTP 4P Cat6 cable, Power suppled through POE switch
Camera image signals are sent to the designated controllers in the protection house, where they are monitored, managed, and recorded The control board enables comprehensive camera control, allowing for the recording and digital storage of images.
A battery system with backup power are equipped to ensure the system operates when the main power is interrupted
3.3.3.1 Structure and function of system
Public sound system is used as an escape guidance system and a notification system from the guard room
- Broadcast emergency news, public announcements when a fire occurs
- Broadcasters: Sufficient rescue around all indoor and outdoor areas
- Can broadcast by region, group, function zone
Equipment of the system includes:
The central cabinet, which includes the controller and amplifiers, will be set up in the guard room to transmit signals to the regional center cabinets Additionally, each functional area will have one set of sound center installed on-site.
- Area with imitating ceiling: Ceiling speakers (3W, 6W)
- Area without imitating ceilings: Wall mounted speakers (6W)
- Outdoor area sports field, multi-purpose house, garage: Ceiling speakers (30W)
3.3.3.3 Alarm system around the fence
An integrated alarm system along with a camera surveillance system will enhance security management for the project area, effectively monitoring and preventing unauthorized intrusions through the perimeter fence.
Integrated alarm system will be used as the system architecture, connecting all alarm devices deployed on a single system by dedicated network combined with security camera system
System equipment is located in the protection room: ray detectors, alarm center, alarm loudspeaker, connection modules and signal announcement
HEATING, VENTILATION AIR CONDITION SYSTEM
Code & Standard
Air conditioning system of the project is designed according to Vietnamese standards and regulations and references to British Standards, Australia Standards and practical standards, design guidelines, ASHRAE standards
No Code & Standard Number Description
Data on natural conditions used in Vietnamese construction regulations, Housing and Public Works - Safety of Life and Health
Data on natural conditions used in Vietnamese construction regulations, Housing and Public Works - Safety of Life and Health
4 QCVN 06:2020/BXD National technical regulations on fire safety for houses and buildings
5 QCVN 13:2018/BXD National technical regulations on car garage
6 TCVN 4088:1985 Climate data used in construction design
7 TCVN 5687:2010/BXD Design standards on Ventilation - Air conditioning
8 TCXDVN 323:2004 Design standards for high-rise buildings
9 QCVN 26:2010/BTNMT National regulations on noise
10 TCVN 232/BXD Standards for design, construction and acceptance of air-conditioning systems
11 TCXDVN 175:2005 Maximum noise level allowed in public works-
12 BS EN 12101-6:2005 British construction standards - Smoke and heat control systems
HVAC Systems Duct Design SMACMA 1981 Edition and second edition -1995 ASHRAE Handbook, 2005 to 2008
14 Vietnamese regulations on environmental protection.
Family apartment
The bedroom is equipped with a wall-mounted inverter heat pump air conditioner, featuring a cooling capacity of 9,000 BTU/h This system efficiently maintains a comfortable temperature, while a wall-mounted ventilator is utilized for fresh air circulation on cooler days and when additional ventilation is required.
The living room is equipped with a wall-mounted inverter heat pump air conditioner that has a cooling capacity of 18,000 BTU/h, ensuring efficient temperature control This unit not only provides cooling during warm days but also functions as a ventilator to maintain fresh air circulation in the living space when needed.
The WC room is equipped with a ceiling fan that effectively expels exhaust gases through the ventilation duct system The calculated airflow for the WC room is 160 CMH (Cubic Meters per Hour), ensuring proper ventilation and air quality.
The outdoor air conditioner is installed centrally at the balcony of each apartment.
Manager house
The bedroom is equipped with a wall-mounted inverter heat pump air conditioner, providing a cooling capacity of 9,000 BTU/h, as detailed in the HVAC calculation spreadsheet The outdoor unit is strategically placed on the roof at the rear of the building For improved ventilation on cooler days, a wall-mounted ventilator is utilized to maintain an airy atmosphere in the bedroom Additionally, the WC room features a wall-mounted exhaust fan with a flow rate of 288 CMH and a ceiling fan with a flow rate of 160 CMH, both of which discharge air through a duct system to the roof.
The living room is equipped with a wall-mounted inverter heat pump air conditioner that has a cooling capacity of 18,000 BTU/h, as detailed in the HVAC Calculation spreadsheet The outdoor unit is conveniently installed on the roof, while a wall-mounted ventilator is utilized for cooler days and to ensure proper ventilation of the space Additionally, the WC room features a wall-mounted ventilation fan with a flow rate of 288 CMH, also referenced in the HVAC Calculation spreadsheet.
Multifunction house
In our sports center and medical healthcare facilities, we specifically install air conditioners in key areas, including doctors' rooms, nurses' rooms, patient rooms, and minor surgery rooms We utilize single split air conditioners with inverter heat pump technology, featuring wall-mounted indoor units that offer cooling capacities of 9,000 BTU/h and 18,000 BTU/h, complemented by outdoor units installed externally.
WC room is ventilated by a wall fan with a flow rate of 546 CMH Sports areas are equipped with wall-mounted ventilation fans.
Supermarket and restaurant
For these two areas there is a large space and a large number of people in and out
The VRV (Variable Refrigerant Volume) air conditioning system is designed to provide efficient cooling for the entire space while enhancing the building's aesthetics Utilizing advanced inverter technology, the system automatically adjusts the compressor and cooling fan capacity based on the needs of the indoor unit Control is facilitated through a wall-mounted controller, allowing users to manage cooling capacity and airflow The indoor unit features a fan with three adjustable speeds: high, medium, and low Cooling capacity calculations are performed using a detailed spreadsheet for optimal performance.
The restroom features a ceiling-mounted exhaust fan that effectively vents air through a duct system In the supermarket and canteen areas, ventilation fans are installed to provide fresh air and expel CO2, maintaining a cool and comfortable atmosphere.
Guard House
Guardhouse No 1 is equipped with a wall-mounted, inverter-type split air conditioner, featuring a cooling capacity of 9,000 BTU/h, as detailed in the HVAC calculation spreadsheet The outdoor unit is installed externally, while a wall-mounted ventilator is utilized for cooling on mild days and for ventilating the bedroom Additionally, the WC room is fitted with a wall-mounted exhaust fan that has a flow rate of 288 CMH, as specified in the HVAC calculation spreadsheet.
Guardhouse No 2 features a wall-mounted ventilator designed for cooler days, ensuring proper ventilation in the bedroom area Additionally, the WC room is equipped with a 300 CMH wall-mounted exhaust fan, as detailed in the HVAC calculation spreadsheet.
Heat calculation
External calculated temperature for group of level II air-conditioning works with the number of unsecured hours is 150hours/year according to Appendix B of TCVN 5687:2010
Absolute humidity kJ/kg o C % o C kg(w)/kg
Main wind direction: East - South
Average wind speed: 2-3 m /s (meter/sec)
Absolute humidity kJ/kg o C % o C kg(w)/kg
(*) Estimate according to 50% of relative humidity
(**) Estimate according to 60% of relative humidity
Qth=Qkc+Qn+Qcs+Qbx+Qkk (Kcal/h)
Qkc: Heat transferred through cladding structures; (Kcal/h)
Qn: Heat from people working in the room; (Kcal/h)
Qcs: Heat from the lighting system and equipment in the room; (W/h)
Qbx: Heat in the house caused by the solar radiation passing through glass door into the room
Qkk: Heat from the outside air into the room; (Kcal/h)
No Symbol Name - Calculation (or choose by TC)
Coefficient of heat transfer of the structure: K=1/(1/n)+(1/t)+(n/n)
n,,t: the outside and inside heat transfer coefficient of cladding structures
n,n: thickness and coefficient of heat conductivity of cladding structures
3 Tn , Tt ( o C) Inside and outside temperature of the Heating, Ventilation and Air conditioning room
4 n Number of people working in the room (expected or taken according to applicable standards and regulations)
No Symbol Name - Calculation (or choose by TC)
Heat from 01 person (Taken by general standards for light work)
6 a = (0,65≥0,85) Coefficients include the influence of electrical equipment not working at the same time & thermal efficiency
7 N (kW) Total capacity of usage electricity
8 B (m 3 /h) Necessary clean air brought into the room
9 Coefficients include the relative position of cladding structures with outside air, indirect contact, then
