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Study On The Characteristics Of An Advanced Energy Storage System For Air-conditioning And Heating Using H2O-LiBr As Working Fluid

Posted on:2007-06-27Degree:MasterType:Thesis
Country:ChinaCandidate:C H XuFull Text:PDF
GTID:2132360182983785Subject:Refrigeration and Cryogenic Engineering
Abstract/Summary:PDF Full Text Request
A closed variable mass energy transformation and storage (VMETS) system for air-conditioning and heating using water-LiBr mixture as working fluid is studied in this paper. First the advanced VMETS system working principle is described and then the dynamic models of the system working process are established. Based on these dynamic models, the operation characteristics of the VMETS system according to a specific example are simulated by numerical simulation respectively under the full and partial storage strategies. The important basic data like the quantity of working solution charged into the system, the volume of the two storage tanks, the parameters of the working solution, and the changing rules like the working solution/refrigerant property at each status point, the power of the compressor, the load of heat exchange devices in the system, and so on are obtained by simulation under the full and partial storage strategies. All those are the basic data for the system design, control, economic estimate, equipment selection or design, and so on.According to the comparison of the simulation results between the full and partial storage strategies, the quantity of working solution charged into the system, the load of heat exchange devices, the maximal volume flow rate of the vapor sucked by the compressor under the partial storage strategy are far below the corresponding parameter under the full storage strategy. Thus the size of the devices under the partial storage strategy will be smaller than the full storage strategy.In this paper, the influences of the outdoor temperature and the air-conditioning load ratio variation on the parameters of working solution charged into the system and the COP of the system, the influence of the variation of the generating pressure on the COP and the maximal volume flow rate of the vapor sucked by the compressor of the thermal storage system under the partial storage strategy are also discussed. Those conclusions of the discussion can provide some theoretical references for deep research work. of the advanced VMETS system.
Keywords/Search Tags:Numerical simulation, Energy storage, Dynamic process, Models, Aqueous lithium bromide
PDF Full Text Request
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