摘要
针对当前冷藏集装箱制冷系统中冷凝器换热效率低、耗铜量大及成本高等问题,为某冷藏车设计了管径为5.00mm的内螺纹铜管换热器,用于替代原管径9.52 mm圆形冷凝器。根据R404A制冷剂在小管径中的传热特性及其热力状态的变化,设计了替代换热器并做了优化流路设计;通过对5.00 mm小管径换热器样件与原冷凝器进行多个蒸发温度工况下的整机测试对比试验,检验设计的合理性。结果表明:小管径换热器耗电量有所增加,大、小管径换热器的整机制冷量偏差在10%以内,制冷性能系数偏差在6%以内;新的小管径圆形换热器耗铜量减少了37.7%。
Aiming at the problems of low heat exchange efficiency,high consumption of copper and high cost of condensers in the refrigerating system of refrigerated container,specially designed a inner threaded copper tube heat exchanger with 5.00 mm diameter for a refrigerated truck,which was used to replace 9.52 mm diameter circular condenser.According to the change of heat transfer and thermal state of R404 A refrigerant in small diameter,designed a heat exchanger to replace and optimized the design of flow path; compared the test under the conditions of multiple evaporation temperature based on 5.00 mm small diameter heat exchanger sample and original condenser,tested the rationality of the design.The results show that the power consumption of small diameter heat exchanger increases.The cooling capacity deviation of large and small diameter heat exchangers is less than 10% and the coefficient deviation of refrigeration performance is less than 6%.The consumption of copper in new small diameter circular heat exchanger is reduced by 37.7%.
作者
胡良玉
柳建华
张良
宋吉
HU Liangyu;LIU Jianhua;ZHANG Liang;SONG Ji(School of Energy and Power Engineering,University of Shanghai for Science and Technology,Shanghai 200093,China;Key Laboratory of Multiphase Flow and Heat Transfer in Shanghai Power Engineering,University of Shanghai for Science and Technology,Shanghai 200093,China;International Copper Association（China）,Shanghai 200020,China)
出处
《轻工机械》
CAS
2018年第3期85-88,共4页
Light Industry Machinery
基金
国家高技术研究发展计划(863计划)(2007AA05Z211)
上海市科委建设项目(13DZ2260900)
关键词
圆形冷凝器
内螺纹管换热器
换热效率
耗铜量
R404A制冷剂
circular condenser
inner spiral tube heat exchanger
heat exchange efficiency
copper consumption
R404A refrigerant
