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根据郑州地区夏季太阳辐射和空调负荷特点,以HFO1234yf为制冷剂,基于实验测试和模拟计算,针对某一太阳能喷射制冷空调系统运行性能进行研究,该系统供冷对象为200 m~2别墅,采用40 m~2真空管式太阳能集热装置和一个带有辅助加热装置的集热水箱作为热源,计算分析冷负荷、辅助加热量以及太阳能集热量的关系。结果表明:5~9月份,郑州地区典型气象条件下,太阳能集热效率、系统喷射系数、系统COP、太阳能喷射制冷系统综合性能COP_0随月份呈波动变化,均在7月份达到最小值;在5~9月份期间,太阳能制冷系统制冷月贡献率在0.46~0.95间波动,9月份制冷贡献率最大达到0.95,7月份制冷贡献率最小达到0.46。
According to the characteristics of solar radiation and air-conditioning load in summer in Zhengzhou, taking HFO1234yf as refrigerant, the performance of a solar-jet refrigeration and air-conditioning system was studied based on the experimental test and simulation calculation. The cooling object was 200m ~ 2 villas, 40 m ~ 2 vacuum tube solar collector and a collector with auxiliary heating device as a heat source, calculate and analyze the relationship between cooling load, auxiliary heating and solar collector heat. The results show that under typical weather conditions in Zhengzhou from May to September, the COP_0 of solar thermal collector efficiency, system injection coefficient, system COP and solar injection refrigeration system fluctuate with the month, all reaching the minimum value in July; During the month of September, the monthly contribution rate of solar refrigeration system fluctuated between 0.46 and 0.95, the maximum contribution of refrigeration reached 0.95 in September, and the minimum contribution of refrigeration reached 0.46 in July.