Abstract：

Taking an information industry park in Weinan as an example, the design points of the sewage-source heat pump system with the effluent from the sewage treatment plant as the cold and heat source are presented. According to the sewage quality report and requirements of the sewage source, the selection basis for the heat exchange method of the sewage-source heat pump system is provided. According to the requirements of the specification, the water intake and withdrawal temperature of sewage in the heating season/cooling season is selected. Combining the sewage treatment capacity of the sewage plant and the cooling and heating load of the building, the models of the special heat exchanger for sewage and the water-source heat pump are determined. To deal with emergencies and ensure system efficiency and energy saving, the project also sets up cooling towers and reserves the location of boilers on the roof, combined with the sewage-source heat pump to form a multi-functional complementary air conditioning system, providing four operating modes, which can achieve the purpose of heating operation in winter and standby in summer. In addition, a series of energy-saving measures are given according to the unique characteristics of the sewage-source heat pump system.