The name of this project is Chengdu Dongyi Library.The building is like a cloud floating above the park.Firstly,we determined the air conditioning load of the library through calculation.The air conditioning system consists of two modular air-cooled vortex heat pump units.The cold water inlet and outlet temperature of the air conditioning unit is 12℃/7℃,and the hot water inlet and outlet temperature is 40/45℃.The air conditioning hot and cold water systems all adopt a closed two pipe primary pump with variable flow rate on the load side.We choose an air-cooled vortex heat pump unit with a built-in hydraulic module.The air conditioning water system is pressurized by an expansion tank in the hydraulic module,which mainly includes a water pump,filter,expansion tank,safety valve,pressure gauge,vent valve,flow switch,flow control valve,and makeup valve.In terms of air flow organization,the large space area of the library adopts a single air duct single return air fixed air volume all air system,with adjustable fresh and return air ratios,which can achieve fresh air operation during the transition season.The air flow organization is in the form of upward feeding and upward returning.We will evenly arrange the air supply vents based on the indoor seating arrangements.To ensure good on-site comfort and air conditioning effect,further comparison was made in the design and selection of air vents.Through on-site measurement of the pore size of the air vent filter mesh,a more optimal 3mm pore size filter mesh was selected.In the design of the smoke exhaust system,based on the structural form and curtain wall effect of the library itself,the form of natural smoke exhaust electric smoke exhaust windows is given priority.
HVACUnderfloor Air Distribution SystemLibraryEnergy wastage
NETL
NSTL
万方数据
