TABLE OF CONTENTS - The Professional Green Building Council

Theme A: Connecting the Pearl River Delta RegionIn the summer, the cooling water will be cooled by the Jialing River water, than itwill be send into the refrigerators. Fig.3 is the air-conditioning system’s schematicsin summer.Refrigeratingunit in the hotelPlate heatexchangerRiver waterintake pipeHeat pumps in thecommercial districtPlate heatexchangerWater purificationsystemFigure 3: Air-conditioning system’s schematics in summer3.1.2 The strategy of air conditioning’s operation in winterIn the winter, it use four water source heat pumps extract heat from river forheating and use free cooling method to meet the need of winter cooling in the hotel.The average river water temperature is at 9℃ to 12℃. The temperature of outletwater ranges from 4℃ to 7℃, which is appropriate as chilled water for hotel’scooling. This free cooling method can achieve the effect without using airconditioning.So it can reduce greatly the energy consumption. Fig.4 is the airconditioningsystem’s schematics in winter.Cooling forthe hotelPlate heatexchangerRiver waterintake pipeHeating for thewhole districtHeat pumpsWater purificationsystemFigure 3: Air-conditioning system’s schematics in winter3.1.3 The strategy of air conditioning’s operation in transition seasonIn transition season, we still use the same strategy like that is in winter. But duringthis period, the average river water temperature is from 14℃ to 19℃. The outletwater temperature may not achieve the necessary free cooling temperature. So wemake the outlet water temperature fall to 8℃ by reducing the cooling water flux. If55