【摘要】 喷射系数是喷射器最重要的性能参数之一,在喷射式空调系统中喷射系数的大小直接决定着太阳能喷射式空调系统的工作能力。通过研究发现,测得喷射器的进口、出口壁面的温度和压力,利用制冷剂工质的物性计算软件计算出测点的热工参数,根据热力学定律可以计算出喷射系数。通过喷射器的CFD模拟数据计算,并且把由质量流量计算的直接法所获得的喷射系数,与壁面测量法计算的间接法所获得的喷射系数进行了比较,比较结果验证了喷射系数的壁面测量法的可行性。更多还原

【Abstract】 The entrainment ratio is one of the most important performance parameter.The value of the entrainment ratio affect the performance of the ejector air-conditioner system powered by solar energy.The thermodynamics parameters can be calculate by the measurement of the temperature and pressure on the wall of the ejector inlet and outlet.And based on the parameters,the ejector entrainment ratio can be achieved through the thermodynamics laws.The simulation of ejector with CFD technique was done.On the base of the simulation,the value of the entrainment ratio was gained by the direct calculation method of the mass flow;the value of the entrainment ratio was also gained by the indirect calculation method of the temperature and pressure measurement.The result of the two different calculation method was compared,and the comparison proved the feasibility of the indirect calculation method.更多还原