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A novel hybrid solid sorption-compression refrigeration technology for refrigerated transportation and storage
International Journal of Refrigeration ( IF 3.9 ) Pub Date : 2020-11-09 , DOI: 10.1016/j.ijrefrig.2020.10.041
P. Gao , L.W. Wang , F.Q. Zhu

The conventional solid sorption refrigeration system could hardly utilize hot water below 90 °C as the driving heat source, and obtain a refrigerating temperature below -10 °C at a condensing temperature above 35 °C, which severely restricts its scope of application. Additionally, for vapor-compression refrigeration systems, low evaporating temperatures inevitably result in high power consumption and low coefficient of performance (COP). To solve these problems, a novel hybrid solid sorption-compression refrigeration cycle is proposed, and a compressor is added between sorption bed and condenser to control desorption pressure, allowing sorbent to regenerate at a lower heat source temperature. At a condensing temperature of 35 °C, the hybrid cycle utilizing the working pair of SrCl2single bondNH3 can operate even at a heat source temperature of 60 °C, while for the conventional one, heat source temperature must exceed 98.6 °C. Its COP is almost independent of the evaporating temperature, mainly benefiting from the constant pressure ratio and compressor power consumption at a given heat source temperature. Furthermore, the hybrid system can effectively recover the waste heat of engine jacket water, thereby providing refrigerating capacity for refrigerated trucks. Under the conditions of 50 °C condensing temperature and -25 °C evaporating temperature, its COP is up to 5.0, while the value of conventional system is only 1.3. Moreover, the hybrid system can utilize 60–90 °C solar hot water to provide refrigerating capacity for refrigerated warehouses. Ultimately, the novel hybrid cycle not only effectively extends the application range of the solid sorption cycle, but also features a higher COP compared to the vapor-compression one.



中文翻译:

冷藏运输和储存的新型混合固体吸附压缩制冷技术

常规的固体吸附制冷系统几乎不能利用低于90°C的热水作为驱动热源,并且在高于35°C的冷凝温度下无法获得低于-10°C的制冷温度,这严重限制了其应用范围。另外,对于蒸气压缩式制冷系统,低蒸发温度不可避免地导致高功耗和低性能系数(COP)。为了解决这些问题,提出了一种新型的混合固体吸附-压缩制冷循环,并在吸附床和冷凝器之间增加了压缩机以控制解吸压力,从而使吸附剂在较低的热源温度下再生。在35°C的冷凝温度下,利用工作对SrCl 2单键 NH 3的混合循环甚至可以在60°C的热源温度下运行,而对于常规温度,热源温度必须超过98.6°C。它的COP几乎与蒸发温度无关,主要受益于在给定热源温度下的恒定压力比和压缩机功耗。此外,混合动力系统可以有效地回收发动机套水的废热,从而为冷藏卡车提供制冷能力。在冷凝温度为50°C且蒸发温度为-25°C的条件下,其COP最高为5.0,而常规系统的COP仅为1.3。此外,混合系统可以利用60–90°C的太阳能热水为冷藏仓库提供制冷能力。最终,

更新日期:2020-12-16
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