太阳能喷射式电冷联供系统的性能分析  

Performance Analysis of a Solar Ejector Power and Refrigeration Cogeneration System

作　　者：蔡向明[1] 翁一武[1] 郑彬[1] 

机构地区：[1]上海交通大学机械与动力工程学院,上海200240

出　　处：《动力工程学报》2010年第6期462-466,472,共6页Journal of Chinese Society of Power Engineering

基　　金：国家自然科学基金资助项目(90610019);上海市国际合作基金资助项目(06DZ07006)

摘　　要：提出了一种新型太阳能热有机物喷射式电冷联供系统,并建立了相应的热力学模型.在此基础上,选取R245fa作为工质,采用Matlab软件对系统进行了仿真计算,分析了发生温度、冷凝温度、蒸发温度、涡轮膨胀比及太阳辐照度对系统性能的影响.结果表明:在太阳辐照度为800W/m2的条件下,在57.3m2的集热面积上可以获得2.03kW的净发电功率和2.85kW的制冷功率,完全能满足普通家庭的日常用电和制冷;提高发生温度、提高蒸发温度、降低冷凝温度或增加太阳辐照度均有利于提高系统的工作性能;提高涡轮膨胀比可以提高系统的电冷比.A new solar ejector power and refrigeration cogeneration system containing organic Rankine cycle was proposed, while corresponding thermodynamic models established, on which basis, an analysis was made to the influence of generating temperature, condensing temperature, evaporating temperature, turbine expansion ratio and solar radiation intensity on the system performance by taking R245fa as the working medium and using Matlab for simulation and calculation. Results show that for a solar radiation intensity of 800 W/m^2 , if the collector area is 57.3 m^2 , then a net power capacity of 2.03 kW and a refrigeration capacity of 2.85 kW will be obtained, which can satisfy an ordinary family on the demand of power and refrigeration. The system performance can be improved by raising the generating temperature and evaporating temperature, lowering the condensing temperature and raising the solar radiation intensity, while the ratio of electrical power to refrigeration capacity can be raised by increasing the turbine expansion ratio.

关 键 词：太阳能 电冷联供系统 有机物朗肯循环 喷射式制冷循环 热力学模型 仿真计算 

分 类 号：TM615[电气工程—电力系统及自动化]