LIFE CYCLE CLIMATE PERFORMANCE ANALYSIS OF SEWAGE SOURCE HEAT PUMP SYSTEMS

摘要

Sewage source heat pump (SSHP) systems recycle urban wastewater as a heat source, developing arnrenewable energy utilization pattern in the severe situation of global energy crisis and environmentalrnpollution. Life cycle climate performance (LCCP), is the most comprehensive assessment method torncalculate the cradle-to-grave warming impact in a quantitative form of the equivalent CO_2 emission. To aidrnthe research on the energy saving and emission reduction potential of SSHP, this paper focused on thernenergy comparison between SSHP and gas-fired and coal-fired boiler, and engineering data of typical casesrnin different cities of north China were tested. Accordingly LCCP model of SSHP was established to calculaternthe greenhouse gases that came from not only the unit but the heating system. Based on the results, indirectrnemission is dramatically higher than direct emission, and energy consumption especially played a key role.rnSSHP, substituting conventional heating ways, has remarkable benefits in ecology and economy. Besides,rnLCCP is supposed to be an index to evaluate refrigerant alternatives in view of the limitation of GWP.