| Heat-source tower heat pump is a system that to solve the water cooled chiller idle and air source heat pump's frost problems of in winter,while tower's design is according to the winter's working conditions,heat pump system is running in the summer,excess heat source tower would have been idle,cause a waste.we proposed a hybrid vapor compression refrigeration system based on liquid desiccant dehumidification and evaporative cooling technology.will spare energy effective utilization,heat pump system's performance will be improve in summer while increasing the heat source tower,tower of heat source heat pump air conditioning system of double run efficiently during summer and winter seasons.Based on the predecessors existing research results,conducted a more in-depth study by through the experiment and simulation of the system.First of all,I have analyzed the feasibility of of the refrigeration system energy saving ability,design and build the test bench.the key influence to the system parameters:flow solution heat exchanger(mshe),the circulation flow rate of regeneration and desiccant and regeneration and desiccant solution since the circulating flow rate were studied,research shows that when the other conditions constant,should increase the desiccant solution as the circulation flow rate,the to increase superheat degree of the refrigeration system,compared with conventional chiller,the system's COPch increased by 19.59%,COPsys increased by 11.85%.Then,this article wants to use Aspen plus as the tool to explore the performance of the system,in view of many scholars in the refrigeration system mainly use Aspen plus for absorption refrigeration system,this paper explores the Aspen plus' Ratefrac model using numerical simulation and experimental data used in counter-current dehumidification and regeneration of the accuracy of the models,in order to use Aspen plus to simulate the large system,we developed the cross flow dehumidification/regeneration and direct evaporation cooling model with Fortran language in Aspen plus.In order to use the Aspen plus tools inquiry based on the parameters of the experimental system have more make the experiment control,compared with the previous scholars,heat and mass transfer correlations of dehumidification and regeneration process,and combined with the experimental data using the least squares fitting out of the direct evaporation cooling process of heat transfer,mass transfer correlations.Laid a solid foundation for later simulation.And then by means of Aspen plus explores the outdoor environment conditions:the outdoor environment temperature,relative humidity and condensation temperature of cooling system will affect the performance of the system.Under the condition of the reference,condensation temperature of 35?,the system can be better than the conventional vapor compression refrigeration system COPch rise by 33.11%,with the fans' and pumps' power load,the COPsys will rise by 22.02%of the system. |
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