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为了提高氨水吸收式太阳能制冷系统的COP,本文提出了用太阳能促使工质循环的方案,即无泵循环系统,主要利用系统中各单元之间的压力差和位差促使工质循环。系统设置两个吸收器,轮换地进行输送溶液或喷淋吸收。文章论述了无泵循环的机理,确定了工质循环所需的能量,经过多次的制冷试验,表明该系统能够成立。COP=0.12～0.18。
In order to improve the COP of ammonia-absorbing solar refrigeration system, this paper proposes a scheme of using solar energy to circulate working medium, that is, a pump-less circulation system, mainly utilizing the pressure difference and the difference of position between units in the system to promote the circulation of working fluid. The system sets up two absorbers that alternately transport solution or spray absorption. The paper discusses the mechanism of pump-less circulation, determines the energy required for working-medium circulation, and after several refrigeration tests, shows that the system can be established. COP = 0.12 ~ 0.18.