Air conditioner of a museum aeration And water supply and drainage construction scheme
（1） The project is a XXX museum project, with 5 floors above the ground and 3 floors underground. The project includes the archives building, museum, staff canteen and other parts. The second and third floors of the project are peacetime garages (Grade V second-class personnel shelters and Grade VI civil air defense material warehouses in wartime) and supporting rooms. （2） Domestic water supply system. The water supply source of the project is municipal tap water, and two DN200 circular pipe networks are introduced from the place designated by the municipal department. The maximum daily water consumption of the project is 23m3/day, and the maximum time is 4m3/hour (excluding water for flushing toilets and watering green roads); The maximum daily cooling water supplement is 84 m3/day, and the maximum is 12 m3/hour. The water supply system is divided into two areas. The three floors underground to the three floors above the ground are low areas, which are directly supplied by the municipal pipe network; The fourth to fifth floors are high areas provided by water supply equipment, and the non negative pressure booster water supply equipment is located on the third floor underground. The municipal water supply pressure is 0.18~0.20Mpa. The project is equipped with remote water meters for metering according to functional zones. The museum, archives, restaurants, kitchens, armed police barracks, and cooling towers are equipped with separate water meters for metering. （3） Reclaimed water system. This project only designs the reclaimed water pipeline system, and the pipeline will be connected with the municipal reserved reclaimed water connection inlet in the future. The maximum daily consumption of reclaimed water is 25 m3/day, and the maximum time is 3.5 m3/hour (water for flushing toilets and watering green roads). The partition of the reclaimed water system is the same as that of the domestic water supply system, and the remote water meter is set for metering according to the functional partition. The outer wall of the reclaimed water pipeline shall be painted and marked according to relevant regulations, and the reclaimed water valve, water meter and nozzle shall have obvious "reclaimed water" marks. （4） Domestic hot water system. The domestic hot water of this project is supplied in a centralized way. The full-time mechanical circulation closed system is adopted. The maximum daily water consumption is 10 m3/60 ℃. The hot water is provided by the volumetric heat exchanger in the heat exchange room on the second underground floor. The heat source is provided by the municipal heat supply pipe network. The water supply zoning is the same as the domestic water supply system. Each zone is supplied with hot water by a system consisting of a positive displacement heat exchanger, an expansion tank and water supply equipment. The pipeline layout is of equal process design. The highest point of the pipe network is equipped with an automatic exhaust valve, and the hot water circulating pump is controlled by the return water temperature. The domestic hot water supply temperature is 55 ℃, and the return water temperature is 50 ℃. A self operated temperature regulating valve is installed on the heat medium inlet pipe of the positive displacement heat exchanger. The temperature bulb is inserted into the heat exchanger and opened by the water temperature control regulating valve in the heat exchanger. The hot water circulating pump is controlled by the return water temperature of the hot water system. A temperature sensor is set on the return water pipeline. When the return water temperature is lower than 45 ℃, the hot water circulating pump starts. When the return water temperature is higher than 50 ℃, the hot water circulating pump stops. Each heat exchanger is equipped with pressure gauge, thermometer and safety valve. In order to reduce scale, an electrostatic water processor is installed at the inlet pipe of the heat exchanger.
