TABLE OF CONTENTS - The Professional Green Building Council

Theme A: Connecting the Pearl River Delta RegionThis project is a large commercial district, and its target is to arrive the award ofthe gold LEED green building certification. The total construction area of thisbusiness community is 82472m2, including 52678m2 need air conditioning.According to the different architectural function, the whole region was divided intohotel and commercial areas. The hotel also needs cooling in winter to meetdifferent customers’ needs. According to the calculation of air conditioning load,the hotel use a centrifugal refrigerator with 1950kw cooling capacity, and thecommercial areas adopt four water source heat pumps with 1950kw as coolingcapacity and 2114kw as heating capacity. The water is taken from the centre of theJialing river which is one of the rivers around the whole Chongqing city by fourdeep water pumps. The river water is delivered into the plate heat exchanger aftertreatment in hydro cyclone and integral water cleaner. Fig.1 shows the schematicwork principles of the water purification system.River waterDeep waterpumpsHydro cyclonePlate heatingexchangerIntergral watercleanerFigure 1: Water purification system.2. THE FEASIBILITY ANALYSIS3.1 Analysis of river water qualityComparing with the Jialing River water sample and the Cooling water qualitystandards, we find that the PH, salinity, hardness, corrosion can meet the airconditioning water quality requirements except the turbidity can’t meet therequirement in summer. To solve this problem, we let the cooling water changeheat with river water by plate heat exchanger,avoid directly using river water.But in winter, the river water can be delivered into the air-condition units directly.53