A novel hybrid solid sorption-compression refrigeration technology for refrigerated transportation and storage
| Autor: | L.W. Wang, P. Gao, Fangqi Zhu |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
Materials science
business.industry 020209 energy Mechanical Engineering Cold storage Refrigeration 02 engineering and technology Building and Construction Coefficient of performance 020401 chemical engineering Thermodynamic cycle Heat recovery ventilation Waste heat 0202 electrical engineering electronic engineering information engineering 0204 chemical engineering Process engineering business Condenser (heat transfer) Gas compressor |
| Zdroj: | International Journal of Refrigeration. 122:1-10 |
| ISSN: | 0140-7007 |
| DOI: | 10.1016/j.ijrefrig.2020.10.041 |
| Popis: | 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 SrCl2 NH3 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. |
| Databáze: | OpenAIRE |
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