Economic analysis of urban untreated sewage source heat pumps

Analyses the characteristics of urban untreated sewage source and urban untreated sewage source heat pumps. By means of an actual project in Harbin, compares the economics and environmental protection of three systems, including urban untreated sewage source heat pump, gas direct-fired heat pump and coal boiler plus electric water chiller. The results indicate that urban untreated sewage source heat pump is the best among them.