Study on Operation and Parameters of Urban Sewage Source Heat Pump System with Freezing Latent Heat Collection

Abstract

Urban sewage is a renewable energy source in the fields of heating and air conditioning engineering, and urban sewage source heat pump system plays an important role on energy-saving and environmental protection. According to the differences of the sewage emission coefficient and heat load of the building, it is not able to satisfy the user heating demand only on the limited temperature difference sensible heat on many situations, especially for the sewage rate of flow in small trunk canals. Therefore, a new heat system named urban sewage source heat pump system with freezing latent heat collection is proposed, in which the freezing latent heat is used as the heating source of the heat pump system at peak heat load in winter as well as the temperature difference sensible heat. According to the status, the system form is brought out and the operation modes of this heat pump system are stated, then the characteristics of the design and operating parameters are discussed.