HVAC is a classified name of work in construction equipment, which mainly includes three aspects: heating, ventilation and air conditioning. Here, I will take you to understand the model essay of the power of attorney for HVAC design, hoping to help you!

Power of Attorney for HVAC design

1. Heating, ventilation and air conditioning

This project is heated by the municipal heating network pipeline, and the heat exchange station is designed by the heating company. Party A is responsible for providing the return water temperature of the primary network, and the design institute provides the pressure flow, lift and heat load parameters of each district of the secondary network.

1. The heating system in the residential area is planned to be divided into four systems. The standard floor residential area is divided into high, middle and low areas, and the geothermal heating system is adopted. The water supply temperature is 6℃ and the return water temperature is 5℃. Radiator heating system is proposed for commercial service and basement heating, with water supply temperature of 8℃ and backwater temperature of 6℃.

2. each building and each system are planned to be equipped with a household inlet device and a heat metering device, and the household inlet device shall be equipped with bypass pipes, drain valves and exhaust valves. Every household and every set of commercial clothing heating is equipped with a set of household heat metering device. Some residential heat metering devices are installed in the pipe diameter, and each set of commercial clothing heat metering device is installed in the sleeve, which is convenient for operation and maintenance. Consider adding a filter before heating the meter.

3. Welded steel pipes are proposed for the main pipes and risers of the heating system. It is planned to set up a main branch pipe in some pipe wells of the residence, with a valve at the joint between the main branch pipe and the main riser, and a main branch pipe behind the valve. Each household branch pipe is connected to the main branch pipe and connected to the indoor water separator by each household branch pipe. Hot water PPR pipes are planned to be used for the main branch pipes of residential buildings and the pipes from the branch pipes to the water separator, indicating the grade. Detailed drawings of tube wells are required. PERT pipe is proposed for geothermal coil. There is no geothermal heating in the balcony connected with the kitchen of the standard floor residence, and geothermal heating is used in the balcony connected with the living room.

4. It is recommended to use radiator for heating in the underground parking lot. Hot air curtain is set at the entrance and exit of basement. The temperature of the parking lot shall be kept above 5℃. On the premise of meeting the requirements of fire protection and civil air defense, the main pipe is given priority in the basement.

5. Load, flow and lift shall be indicated at the entrance of each building and each system.

6. The heating temperature of the equipment room is as specified in the design, and the light-row tube radiator is adopted. The average room temperature is 16℃. It is suggested that electric heating should be used for heating in the fan room.

7. The underground parking lot shall be equipped with mechanical smoke exhaust system according to the fire control requirements, and it shall be considered to be combined with sanitation, air defense exhaust and ventilation systems. If the basement floor is low, can you consider using diagonal flow fan for air intake and exhaust in normal garage ventilation, and using two-speed fan for air intake and exhaust in cooperation with jet induced fan steering flow?

8. The diesel generator room shall be equipped with smoke exhaust and air supply system as required.

9. The heat exchange station shall be located as close as possible to the load center of the community and the primary network, and the noise reduction shall be considered as much as possible.

1. Design of heat exchange station

The design of heat exchange station shall be entrusted separately, and the design institute shall cooperate.

11. The pipeline in the system diagram shall be marked with elevation and pipe diameter.

12. The pressurized air supply outlet, smoke exhaust outlet and structure of each floor in the basement and standard floor are not allowed to be located in short legs and hidden columns, and the structure should be treated in advance. Reserve a hole in the structural drawing.

13. The heating pipes in the basement and transfer floor should be aligned with the structure, and it is forbidden to cross and be located in short legs and concealed columns.

ii. water supply, drainage and fire fighting

the municipal government provides the pipe diameter and pressure for the primary domestic water supply network, and the municipal government designs the primary domestic water supply network.

1. The living water tank room and the secondary pressurization equipment room are planned to be located in the basement, and the noise problem should be considered as much as possible. The location is as close as possible to the center of the community and the location close to the primary network. Considering that this project is divided into two phases, it must be located in the basement of the first phase project to ensure the water supply for the first phase project and reserve the position of water supply pipeline for the second phase project.

2. Food grade stainless steel S34 is proposed as the material of domestic water tank.

3. It is planned to set up three zones in the water supply system of the residential area, namely, high zone, middle zone and low zone.

4. It is planned to use plastic-lined steel pipes for the main water supply pipe and main pipe, and PPR pipes for the branch pipes at home, indicating the grade.

5. Centrifugal cast iron pipes and clamps are proposed for the following drainage pipes; U-PVC double-walled inner spiral pipe is proposed for residential drainage riser, U-PUV solid wall pipe for branch pipe and U-PUV solid wall pipe for ventilation pipe.

6. Separate sewage and rainwater system in the residential area.

7. Underground parking lot and equipment room

(1) Underground parking lot and equipment room shall be equipped with fire sprinkler system and indoor fire hydrant according to fire control requirements.

(2) The underground parking lot and the first floor road should be provided with sanitary and clean water, and the ground should be provided with open drains, collecting wells and sewage pumps.

(3) The equipment room shall be equipped with water supply and drainage according to the process requirements. Equipment layout details and piping system diagram of the equipment room;

(4) The elevator shaft is provided with a sump and a sewage pump, and the sump of the elevator shaft can be used together with the sump of the underground garage.

(5) On the premise of meeting the requirements of fire control and civil air defense, indoor and outdoor fire hydrant ring pipes, main sprinkler pipes and main water supply pipes are preferentially located in the basement.

8. Business service part on the first and second floors

(1) The business service part is equipped with fire sprinkler system and indoor fire hydrant according to fire control requirements.

9. Residential part

(1) Kitchen and bathroom: Sanitary ware shall be set according to the building plane, and the user's decoration shall be considered for pipeline laying and water meter setting, and the drainage of washing machine shall be considered for floor drain setting. It is planned to reserve the pipeline interface of electric water heater, but the kitchen treasure socket.

(2) It is planned to set up a household main branch pipe in the tube well, and lock valves, gate valves and water meters are set on each household branch pipe. Provide detailed drawings of tube wells.

(3) consider the height of the transfer floor.

1. (1) The elevation of all pipelines shall be set in the water supply and drainage and fire fighting system diagram.

(2) Check the position and structural diagram of the bathroom, and it is forbidden to have beams under the bathroom.

11, the basement spray system in the case of basement heating wet system is proposed.

third, the external network pipeline of the community

1. The outdoor water supply and drainage pipeline, gas pipeline, heating network pipeline, power pipeline and communication pipeline of the community are designed and constructed by relevant professional companies, and the design institute will cooperate with them.

2. The roads in the residential area shall be drained in an organized way and discharged into the municipal management.

3. The outdoor septic tank shall be cleaned once every six months.

note: the above-mentioned unknowns shall be subject to the current national standards.

model power of attorney for entrusted design task of the project

Party A: _ _ _ _ _ _ _ _ (hereinafter referred to as Party A)

Party B: _ _ _ _ _ _ _ _ _ _ (hereinafter referred to as Party B)

After friendly negotiation between Party A and Party B. Party a agrees to entrust party b with the construction drawing design of the

single building project of arcadia Phase II project, and party b shall carry out the design work according to the requirements of party a, with the specific design points as follows:

1. Architectural specialty:

1. The absolute elevation of . is determined according to the vertical elevation of the general plan.

2. The height difference between the entrance hall of the entrance unit and the outdoor road is

① It is suggested to change it to +8 mm;

② aproll is level with the elevation of the bottom hall; The height difference between the stairwell and the room is -15 mm

3. Lighting in the basement: the semi-basement uses high windows for lighting.

4. The number of floors, the number of units and the combination of apartment types shall be subject to the apartment type and general plan provided by Party A, and the relevant requirements are

details of apartment type: only openings are reserved for indoor doors, but no doorframes are made, and steel safety doors are uniformly installed for entrance doors, and the size of safety doors is 1? 21; The unit door is a visual intercom electronic security door, and the power supply is reserved.

5. Elevator: 8kg Mitsubishi elevator; Do a good job of reserved design according to the technical standards of strategic partner products of the head office; The elevator doesn't reach the underground garage.

6. The detailed design of kitchen and bathroom shall be examined and approved by Party A;

7. Air-conditioning panel and its correlation: the size and position of air-conditioning panel should meet the installation requirements of air-conditioning, and the position and height of air-conditioning socket, air-conditioning hole and air-conditioning panel should be reasonable. The height of air-conditioning hole in the living room is .1m from the ground, and that of other rooms is 2.1m (the hole is low); Outdoor air conditioning panel is equipped with aluminum alloy louver guardrail.

8. cloakroom requirements: the wall thickness is 1mm (light partition wall).

9. Piping and related: Water supply should pass through the pipe well as much as possible. When the pipe well is set, the size should be reduced as much as possible, occupying the public space as much as possible, which will not affect indoor use, especially the kitchen.

1. windows: windows of different sizes should be made in large details, with uniform forms, and the sizes of windows in the same room should be uniform. Open as many parts as possible. The window is made of colored aluminum alloy, the color of which is to be determined by Party A, so as to increase the facade effect. The opening method is push and pull.

11. The facade of the building should be consistent with the renderings provided by Party A..

12. Floor construction method:

(1). Floor construction method is

(1) 2-thick 1: 3 cement mortar leveling +SBC waterproofing+4-thick C25 fine stone concrete surface layer is pressed and calendered;

② The floor of the indoor building is 3cm thick and 1:2.5 cement mortar is leveled and embossed.

(2) The thickness of the owner's decoration practice is reserved to be 2cm.

13. ceiling practice: no plastering, white cement scraping putty once, and ordinary putty once.

14. Practice of interior wall surface: mix mortar wall surface, scrape ordinary putty twice, and render the bathroom and kitchen with 1: 3 cement mortar.

15. Exterior wall practices; External wall thermal insulation mortar is 2~3 thick; 6mm thick 1: 2.5 cement mortar plastering and calendering mixed with anti-crack fiber; Neutral elastic coating.

16. Interior wall of stairwell: mixed mortar plastering+common interior wall coating.

17. Stair floor practices: the stair treads on the first, second and third floors, the front room of the elevator and the stair rest platform are made of granite, and the stair treads and stair rest platforms on the third floor are calendered with cement mortar. The elevator front room is made of granite floor (ground), and the granite floor (ground) is pasted with black granite edging and skirting, with the width and height of 15MM, and the elevator doors are made of marble door covers and door covers.

18. Roofing practice: sloping roof is adopted, and a south rest platform is left for each household. Flat roof practice: rigid and flexible waterproof, (2 thick 1: 3 cement mortar leveling +FSG insulation brick insulation and slope finding +2 thick 1: 3 cement mortar leveling +SBC rolling waterproof +4 thick C25 fine stone concrete rigid waterproof (with? 4@25 two-way mesh, roofing tile); Inclined roof practices: celadon

tile (the variety of tile is determined by Party A), 1: 2.5 cement mortar hanging tile, polyurethane coating waterproof, 1: 2.5 cement mortar leveling and calendering, 5 thick FSG thermal insulation, and 5 thick 1: 2.5 cement mortar bonding layer. The style and practice of roof modeling must be unified, and the overall effect shall not be destroyed.

19. Roof insulation: FSG waterproof perlite insulation brick insulation.

2. Waterproofing of basement and external wall: SBC coiled material is waterproof with 2cm cement mortar protective layer (anti-leakage measures should be considered for construction joints of basement external wall).

21. Waterproof practice of toilet: polyurethane coating is waterproof twice.

22. Floor height: the staggered floor height is 45mm, and the standard floor height is 2.8m (adjusted according to the structure).

23. Wall material: The multi-layer wall material is 24mm thick KP1 clay brick; High-rise, small high-rise external wall masonry material is 2 mm thick KM1 clay hollow brick, internal wall masonry material is 2 mm thick KM1 clay hollow brick, kitchen and bathroom partition material (non-load-bearing) is 12 mm thick clay hollow brick (the wall should be based on Jiangsu Province's "Standard for Control of Common Quality Defects in Residential Engineering" to develop anti-cracking measures).

24. The external wall thermal insulation material is external wall thermal insulation mortar.

25. The French window guardrail is set indoors, made of wrought iron, and the design is designed by the design unit and confirmed by Party A; The height should meet the specification requirements, and the height of the floor-to-ceiling window platform and the node practices should be unified.

26. Implement energy-saving design standards and carry out energy-saving design.

27. Other requirements:

① Door and window glass is made of insulating glass, and its specifications and performance comply with relevant regulations;

② The kitchen is equipped with a smoke exhaust duct, and the large pipes of the kitchen and bathroom are arranged outside by the small pipes in the corner.

28. The design style and size of the unit hall should be unified.

29. In the underground storage room of each building, a parking space of 3M2 for public bicycles should be reserved, and the convenience of getting up and down the ground should be considered.

3. According to the actual situation in Nanjing, the specific requirements and practices of basement waterproofing should be specified in detail.

Second, structural specialty

1. Structural form: multi-storey brick-concrete structure, with short supporting wall structure for small and high-rise buildings based on economy and practical aesthetics; (The type of foundation and pile foundation shall be agreed with Party A)

2. The steel content of the structure is multilayer: 3 ~ 35 kg/㎡; Small and high-rise buildings are 45 ~ 5kg/㎡

3. ① Meet the requirements of codes and aseismic structures, and reasonably set structural columns and cast-in-place concrete belts to avoid cracks in walls;

② design the prevention and control of common quality diseases according to the requirements of Jiangsu Province's Standard for Control of Common Quality Diseases in Residential Engineering.

4. Other requirements:

① Set the concrete waterproof guide wall in the bathroom, and indicate the construction technology;

② When designing the main and secondary beams and cornices of the balcony, attention should be paid to their beauty and structural safety;

③ The national standard design atlas is indicated in the structural design, and the designers must complete the relevant design contents if it is not clear in the atlas and make necessary recheck according to the practical requirements of the atlas.

3. Water supply and drainage:

1. Water supply system zoning: natural water supply for multiple floors; High-rise, small high-rise 1 to 5 floors are low-pressure areas, which are directly supplied with water by municipal pipe network; The 6 ~ 11th floors of the small high-rise building are pressurized areas, and the pressurized water supply is provided by the residential pressurized pump station.

2. Location of the top-floor fire water tank: it is placed on the 11th floor residence, and the water pump should be designed for freezing and rain prevention.

3. The water supply and hot water pipes are cold and hot PPR pipes respectively, and the heating pipe is hot PPR pipe; Small and high-rise drainage pipes are PVC spiral muffler pipes.

4. Well setting:

① Pipeline well: fire-fighting pipeline, water supply pipeline and fire control line threading riser (PVC4 pipe).