Study On Performance Analysis And Operation Optimiziation Of Heat Source Tower Heat Pump For Whole Year

A heat-source tower heat pump, as a novel integrated heating and cooling unit, has the advantages of high cooling efficiency and heating efficiency,meantime avoids the frosting problem of air source heat pump in winter,which gets lots of focuses.In order to solve the problem that operating under partial power running conditions causes the low efficiency because the heat source tower heat pump run under partial load for most time,the author proposed a new system performance evaluation method,namely entransy loss analysis method to launch a in-depth study on performance analysis and operation optimization for whole year based on entransy theory.First,it was proposed of extremum entransy loss principle of heat source tower heat pump system to theoretically verify the feasibility of application of entransy loss to evaluate the performance of heat source tower heat pump based on energy balance equation and entransy theory.and the entransy loss model was built to get the entransy loss calculation formula of each model and whole system..Second,based on entransy loss model,the entransy loss simulation program was compiled and the test bench was established to analyze the change regulations between the entransy loss rate of each model and operation parameters.Then,based on extremum entransy loss principle of heat source tower heat pump,the author studied the operation optimization of heat source tower heat pump for system heating load/refrigerating capacity fixed and system input power consumption fixed and got the operation optimization parameters of partial load under different outdoor meteorologic parameters,which realized the operation optimization of heat source tower heat pump system for whole year.Last,it was respectively studied of change regulations of liquid gas ratio and the entransy loss rate of heat exchanger(condenser,evaporator and heat source tower) under the optimized operation conditions in winter and summer.The results showed that the liquid gas ratio changed between 0.22-0.47 and the ratio of entransy loss rate among condenser,evaporator and heat source tower was about 1:1.2:2.5 under optimized operation conditions in winter,the liquid gas ratio changed between 0.8-1.17 and the ratio of entransy loss rate among condenser,evaporator and heat source tower was about 1.4:1:1.8 under optimized operation conditions in summer.