The Optimization Research On The Evaporation Side Of Heat Pump And Hot Water System Based On Compound Condensation Technique

The compound condensation technique adopts air and water condensation mode orall water condensation mode which replaces the single air condensation mode or lwater condensation mode of the traditional building heat and cold source to chargeheat and aquire cold and hot water with the needless heat.This technique makes largeeffect to environment,energy resource and economy.In this paper,on the basis ofresearch on the heat pump and hot water system based on compound condensationtechnique,the optimization on the evaporation side of the system is proposed.In this paper,the new system form which is optimized on the condensation side ofthe heat pump and hot water system based on compound condensation technique isproposed firstly. The operation conditions and advantages of the optimized system areexpounded. The optimized system adopts water evaporation mode which charges coldby the outdoor pool.The evaporation temperature has gone up in this mode.Further,acold accumulation tank is added in the new system.Due to the cold accumulationtank,the optimized system realizes cold accumulation during the off-peak electricityhours at night and charging accumulated cold through cold water during the peakelectricity hours in the daytime.By the software CYCLEPAD,simulation of the optimized heat pump and hotwater system based on compound condensation technique is realized in this paper.It iscan be gotten that:both the new added water evaporation mode and cold accumulationmode do not make bad effect to the condensation side of the system.The condensationheat recovery function of system still can be realized smoothly.The COP of the systemhas rised due to the raised evaporation temperature in the water evaporation mode.Thenew added cold accumulation function makes COPlappears based on COPaandCOPw..So,COPa+w+lreplaces COPa+wand the performance of the sytem is better by6%.Exergy analysis method is adopted by the research in the paper.The traditionalsystem,heat pump and hot water system based on the compound condensationtechnique and optimized system are all analyzed by exergy method.The exergyanalysis modelings are completed and the evaporation and condensation temperaturevarying goal exergy efficiency of three systems diagram is gotten.This diagram showsthat goal exergy efficiency the optimized system on the evaporation side has risedby3%to8%. All in all,viewed from both COP and energy analysis, the optimized system onthe evaporation side is more stable,energy-saving and effective than the heat pumpand hot water system based on the compound condensation technique.