Form and Applicability of a New Urban Sewage Source Heat Pump System with Freezing Latent Heat Collection

A key review of wastewater source heat pump (WWSHP) systems

“…Qian et al [22] reported that the temperature of urban WW was suitable while its mass flow rate was insufficient as a cooling/heating source. Because the building heat peak load could not be met by a conventional WWSHP, they proposed a special freezing latent heat exchanger and a HP system configuration.…”

“…Fig. 10 illustrates a schematic of the novel HP system discussed in [22]. The WWHE and the freezing latent heat exchanger operate in series while at the peak heat load two sets of HP units (the firstand second-stage HP units) with the different evaporation temperature are utilized.…”

“…In the heating mode, it runs similar to the cooling mode at a low heat load. But at the peak heat load, the end water cycle is heated by successive HP units while valves (XI and XII), and all pumps are open, and valve (XIII) is closed [22].…”

“…Schematic illustration of urban WWSHP system with freezing latent heat collection (modified from[22]). I. Wastewater system, II.…”

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

“…It is a promising and renewable when using urban sewage as the cooling and heating resource in the heat pump system in the fields of heating and air conditioning engineering [1~2]. But for different heat load in different areas and sewage discharge coefficient, the ration between general drainage construction area and heat supply area is 7~10:1 [3]. Many occasions, the load demand of users heat supply working condition is not often satisfied.…”