太阳能热虹吸自喷射制冷系统喷射系数的计算

The Calculation of Entrainment Ration of the Solar Thermo-siphon Self-injection Refrigeration System

本文根据气体动力学方法和定压混合理论,以Visual Basic为工作平台编制了太阳能热虹吸自喷射制冷系统的喷射器喷射系数的计算程序。计算出了以水为制冷工质的各种工况下喷射器的喷射系数。根据计算结果分析得出:喷射系数随发生温度升高而增大,发生温度每升高1℃,喷射系数增加0.007;随蒸发温升高而增大,蒸发温度每升高1℃,喷射系数增加0.031;随冷凝温度的升高而减小,冷凝温度每升高1℃,喷射系数减少0.033。这为提高制冷系统喷射系数提供了有效的途径。

Based of gas dynamics and constant pressure mixing theories, the entrainment ratios of the solar thermo-siphon self-injection refrigeration system are calculated by Visual Basic. The entrainment ratios of the refrigerant water have been gained in different conditions. The calculation results show： the entrainment ratio will increase with the increasing of evaporator temperature. The entrainment ratio increasing is 0.007 at increase of 1℃. It will increase with the increasing of generator temperature. The ratio increasing is 0.031 at increase of 1℃. And it will decrease with the increasing of condenser temperature. The ratio decreasing is 0.033 at increase of 1 ℃. It offers the effective way to higher entrainment ratio of the refrigeration system.