| 摘要: |
| 本文分析了对R290直接接触冷凝制冷循环的性能，并与R290常规单级压缩制冷循环的热力性能进行比较，得出：在最佳的主循环冷凝温度下，R290直接接触冷凝制冷循环可获得最大的性能系数和最低的冷凝器热负荷。主循环过冷液体的过冷度增大，最佳主循环冷凝温度升高，最优性能系数降低、最低冷凝器热负荷增加、蒸发器的制冷剂质量流量减少。当蒸发温度为﹣15~﹣6 ℃范围内，R290直接接触冷凝制冷循环相比R290单级压缩制冷循环的性能系数提高了7.5%~14.9%，冷间供冷设备蒸发器的制冷剂质量流量减少了26.5%~36.7%，冷凝器热负荷减少了1.5%~3.7%。结果表明R290直接接触冷凝制冷循环具有很好的发展前景。 |
| 关键词: R290 直接接触冷凝 制冷循环 性能 |
| DOI： |
| 投稿时间：2017-09-07
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| 基金项目:天津市自然科学基金(18JCYBJC22200)项目资助。 |
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| Analysis and Comparison of the Refrigeration Cycle Performance of R290 Direct Contact Condensation |
|
Ning Jinghong, Zhu Kai, Liu Shengchun, Dong Qiang
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| (Tianjin Key Laboratory of Refrigeration Technology, Tianjin University of Commerce) |
| Abstract: |
| In the study, thermal performances of direct contact condensation refrigeration cycle with R290 were analyzed and compared with conventional one stage compression refrigeration cycle with R290. The following conclusions are obtained. The maximum coefficient of performance and minimum condenser heat load of direct contact condensation refrigeration cycle with R290 are obtained at the optimum condensation temperatures of the main cycle. With the increases in the supercooling degree of the supercooled liquid in the main cycle, the optimum condensation temperature of main cycle is increased，the maximum coefficient of performance is reduced, the minimum condenser heat load is increased, and the refrigerant mass flow rate of evaporator is decreased. When compared with conventional one stage compression refrigeration cycle with R290 in the range of evaporating temperature from ﹣15 ℃ to﹣6 ℃, the coefficient of performance of direct contact condensation refrigeration cycle with R290 is increased by 7.5%–14.9%, refrigerant mass flow rate of evaporator in cold room cooling equipment is reduced by 26.5%–36.7%，and condenser heat load is reduced by 1.5%–3.7%. The results indicate that the direct contact condensation refrigeration cycle with R290 is promising. |
| Key words: R290 direct contact condensation refrigeration cycle performance |
