基于太阳辐射值的喷射制冷系统动态性能分析

为了了解气象参数对喷射制冷系统性能的影响,选取HCFC-134a作为制冷剂,基于EES软件建立了太阳能喷射制冷系统动态性能仿真程序,模拟研究了太阳辐射值对系统性能的影响。研究表明:一定运行工况下,随着太阳辐射量的增加,系统COP呈现先升高后下降的趋势;发生热量和发生温度均呈现递增趋势;制冷量则呈现先增加,当太阳辐射到达一定值时,系统的制冷量则基本不变的趋势。系统在相同蒸发温度和冷凝温度下运行时,存在一个最佳发生热量工作区,在该最佳发生热量区,系统COP最大,出冷量也最多。

Dynamic Analysis of Ejector Refrigerant System Based on the Solar Radiation

For understanding the performance of solar ejector refrigerant, based on the EES software, established a computation program of solar ejector refrigeration system, analyzed the influence of the solar radiation on the coefficient of performance (COP) using HCFC134a as refrigerant, the results showed that the COP increases first and then decreases with the solar radiation increasing, and the heat transfer capacity and the generator temperature increase with the solar radiation increasing, and the cooling capacity of the system is increasing at first, when the solar radiation reaches a certain value, the cooling capacity can almost keep constant. In addition, the results also indicated that there is an optimum area about heat transfer capacity of generator when the system runs at the same evaporator temperature and condenser temperature condition, and the system COP is the largest and the cooling capacity is also the most at the same time.