【作者】 林芃； 王如竹； 夏再忠；

【Author】 Lin Peng Wang Ruzhu, Xia Zaizhong (Institute of Refrigeration and Cryogenics, Shanghai Jiao Tong University, Shanghai 200240)

【机构】 上海交通大学制冷与低温工程研究所；

【摘要】 采用两级氨水吸收循环可以实现太阳能热水驱动与风冷冷却的结合,从而适应太阳能空调家用小型化需要。本文建立了系统的数学模型,从热力性能以及电力性能两个方面对系统进行评估,研究表明冷却空气串联流过冷凝器其次流过吸收器时系统性能系数较高,夏季极端工况下热力COP为0.34,电力COP大于25。变工况研究表明热源温度升高,蒸发温度升高,冷却空气温度降低时系统热力COP、电力COP均增大,系统在不利工况下性能波动较小。风冷两级氨水吸收循环发生的氨蒸汽浓度较高,无需精馏,并且热源进出口温差较大,能够充分利用低品位热能,某些工况能够回收低压级排出的部分吸收热用于发生。太阳能热水驱动氨水两级吸收风冷空调具有良好的应用前景。更多还原

【Abstract】 Combined Solar hot water driven and air-cooled air conditioning for small scale residential uses could be realized by two stage ammonia-water absorption refrigeration. In this paper both thermal and electrical performances are evaluated by mathematical models. The analysis showed that cooling air should cool condenser firstly and absorber secondly. Thermal COP about 0.34 and electric COP above 25 could be obtained in hot summer condition. The researches show that both the thermal and electrical COP increase with the increase of hot water and evaporation temperature, and with the decrease of cooled air temperature. Rectifier is not required in the system because the basic concentration of ammonia vapor could reach the standard. Low grade heat could be utilized efficiently due to large inlet and outlet temperature difference of the driven hot water. Absorption heat recovery of low pressure side could be used for generation to increase thermal COP in some working condition.更多还原