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首页> 外文期刊>International journal of green energy >Performance of a small-scale solar-powered adsorption cooling system
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Performance of a small-scale solar-powered adsorption cooling system

机译：小型太阳能吸附冷却系统的性能

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In this study, an experimental investigation on the performance of a small-scale residential-size solar-driven adsorption (silica gel-water) cooling system that was constructed at Assiut University campus, Egypt is carried out. As Assiut area is considered as hot, arid climate, field tests for performance assessment of the system operation during the summer season are performed under different environmental operating conditions. The system consists of an evacuated tube with a reflective concentration parabolic surface solar-collector field with a total area of 36 m(2), a silica gel-water adsorption chiller of 8 kW nominal cooling capacity, and hot and cold water thermal storage tanks of 1.8 and 1.2 m(3) in volume, respectively. The results of summer season field test show that under daily solar insolation varying from 21 to 27 MJ/m(2), the solar collectors employed in the system had high and almost constant thermal efficiency. The daily solar-collector efficiency during the period of system operation ranged from about 50% to 78%. The adsorption chiller performance shows that the chiller average daily coefficient of performance (COP) was 0.41 with the average cooling capacity of 4.4 kW when the cooling-water and chilled-water temperatures were about 31 degrees C and 19 degrees C, respectively. As the chiller cooling water is cooled by the cooling tower in the hot arid area, the cooling water is at a higher temperature than the design point of the chiller. Therefore, an experiment was carried out using the city water for cooling. The results show that an enhancement in the chiller COP by 40% and the chilling power by 17% has been achieved when the city water was 27.7 degrees C.
机译：在这项研究中，对在埃及阿西尤特大学校园建造的小型住宅用太阳能驱动的吸附（硅胶-水）冷却系统的性能进行了实验研究。由于Assiut地区被认为是炎热，干旱的气候，因此在不同的环境操作条件下，要对夏季系统运行性能进行现场测试，以进行评估。该系统由总面积为36 m（2）的反射式抛物面太阳能集热器真空管，标称制冷量为8 kW的硅胶-水吸附式冷却器以及冷热水储罐组成分别为1.8和1.2 m（3）的体积。夏季野外测试的结果表明，在日照强度从21到27 MJ / m（2）不等的情况下，系统中使用的太阳能收集器具有很高且几乎恒定的热效率。在系统运行期间，太阳能集热器的日效率介于50％到78％之间。吸附式制冷机的性能表明，当冷却水温度和冷却水温度分别约为31摄氏度和19摄氏度时，制冷机的平均每日性能系数（COP）为0.41，平均制冷量为4.4 kW。当冷却器冷却水被热干燥区域中的冷却塔冷却时，冷却水的温度高于冷却器的设计点。因此，进行了使用城市用水进行冷却的实验。结果表明，当城市供水温度为27.7摄氏度时，制冷机的COP提高了40％，制冷能力提高了17％。

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