Research On The Solar Power Low Temperature Generation System

On the basis of all kinds of low temperature solar energy power generationsystem，extensive research and comprehensive theoretical analysis have set up aplatform system. This paper has discussed the effect of the eight different kinds ofworking fluid dielectric property to the power system efficiency and the theory hasanalysised and optimized the system parameters to set. For95degrees hot water ofordinary solar water heater, has optimized the system parameters such as theevaporation temperature, condensation temperature, importation pressure andexportation pressure. Prototype to R245fa as an example to verify the theory ofsystem parameters, the experimental and theoretical analysis show as follows:1) Without considering the heat transfer efficiency of heat exchanger, the higherevaporation temperature, the system output power and the thermal efficiency is thegreater and considering the heat exchanger, vaporizing temperature setting in themaximum of heat transfer temperature heat exchanger is suitable.2) Heat source temperature above240oC, the unit mass flow of the mediumpower capability is not vaporization temperature is bigger the better, but there is anoptimal temperature point.3) In the8kinds of working medium, work ability of R113is relatively larger,RC318is minimal.95degrees hot water provided by ordinary solar water heaters toR245fa as an example take the vaporizing temperature about67oC, can output thebiggest power system. Vaporization temperature continue to improve, the system ofthe net output power, power, and the thermodynamics efficiency will begin to decline.The bigger the temperature difference of heat exchanger can effectively reduce thecost, but should not be too large.4) Analysis of Aspen software simulation analysis of the power generationsystem, has validated organic medium heat transfer efficiency, and has reduced theexperimental cost, for the development of new media and new system.