液冷和冷媒直冷动力电池包冷却性能数值分析

采用数值模拟的研究方法，对比分析了某纯电车型在高速超速以及驱动耐久工况下动力电池包采用液冷和冷媒直冷两种方案的冷却性能，研究结果表明，对于高速超速工况，相对于液冷方案，采用冷媒直冷电池包温度降低了约10%；对于驱动耐久工况，采用冷媒直冷方案电池包温度降低了约 16%，与此同时，电池包均温性也有所改善。在相同工况条件下，动力电池包冷媒直冷的冷却性能优于液冷。     

船舶制冷系统的清洁船舶标志应用

介绍了法国船级社规范中有关船舶制冷系统的附加环保标志CLEANSHIP(清洁船舶)的内容,以及在某型化学品船上实施的情况。对中央空调和冷藏设备的制冷剂选用、回收再利用和泄漏报警等方面作了论述,为后续新船设计和建造提供了借鉴。     

中国航运界关于限制CFCs对策研究

正当近期内，氯氟烃物质（ＣＦＣｓ和ＨＣＦＣｓ）面临着被限制使用或被替代的严峻形势，本文分析了禁用氯氟烃的实质，及其对我国航运界的影响，特别对于远洋运输业的影响。并通过对国内外ＣＦＣｓ替代技术的进展的分析研究，提出我国航运界关于限制ＣＦＣｓ的对策。     

DETERMINATIONSOFREFRIGERANTCHARGEOFAREFRIGERATORWHENREFRIGERANTISREPLACEDBYR134aORR152a

ＤＥＴＥＲＭＩＮＡＴＩＯＮＳＯＦＲＥＦＲＩＧＥＲＡＮＴＣＨＡＲＧＥＯＦＡＲＥＦＲＩＧＥＲＡＴＯＲＷＨＥＮＲＥＦＲＩＧＥＲＡＮＴＩＳＲＥＰＬＡＣＥＤＢＹＲ１３４ａＯＲＲ１５２ａ＊ＤｉｎｇＧｕｏｌｉａｎｇＷａｎｇＸｉａｎｆｅｎｇＺｈａｎｇＣｈｕｎｌｕＣｈ...     

Two Phase Pressure Drop Performance of Refrigerant in a Small Horizontal Smooth Tube with 2.5 mm inside Diameter

Two-phase flow pressure drop measurements were made during the phase change heat transfer process of R22 in a small horizontal smooth tube with 2.5 mm inside diameter. Conclusions can be drawn that the quality corresponding to the pressure gradient peak value of small tubes became higher than that of large tubes. The effect of quality to pressure drop becomes weak as the mass flux increases. The experiment data were compared with the predicated values of the state-of-the-art correlations from the open literature. The comparisons between the data and the predictions indicate that most of the state-of-the-art correlations fails to predict the experimental data.Chisholm model shows a relatively better predictive ability than the other empirical correlations although it has a mean deviation of 26.7%. But the predicated values of Chisholm model are lower by 50% than the experimental data when the quality becomes larger.     

R407C取代R22的工况计算及分析

围绕制冷剂发展历程和制冷剂技术更新进行了讨论.着重介绍制冷剂R407C替换制冷剂R22的工况计算,基于生产实践提出了制冷剂替换对系统的影响以及系统需要做出的改变.     

A New Experimental Rig of Testing Flow Boiling Heat Transfer of Refrigerant and Lubricant Mixture

This paper proposed a new experimental rig of testing flow boiling heat transfer of refrigerant and lubricant oil mixture. The quantity of oil in the test section can be controlled and regulated conveniently and accurately by connecting separate lubricant oil circuit with test section in parallel. It was built up by retrofitting a multiple air-conditioner and installing three oil-separators in serials at the compressor outlet. And so the lubricant oil in the discharged refrigerant gas of compressor can be removed completely. The refrigerant flow rate through test section can be bypassed by the by-path circuit of indoor unit. This experimental rig has advantages such as on-line and continuous oil injection, short time of obtaining stability, flexible operation, simple control, which lead to high efficiency in the research of flow boiling heat transfer of refrigerant and lubricant oil mixture.     

汽车空调制冷剂R134a取代R12的分析研究

R134a是一种对大气臭氧层没有破坏作用且化学性质稳定的制冷产品，R134a替代R12是可行的、必须的。通过对R12与R134a性质的对比，可总结出制冷剂替换后对汽车空调系统产生的影响及相对应的一些改变。     

船舶伙食冷藏库的设计

简述浙江某船业公司16500t货轮伙食冷藏库工程设计的过程,介绍船用冷库工作特性和常规的工艺设计方案,以及设计技术参数和冷量的选定等,供有关设计、使用人员参考.     

汽车空调制冷剂回收机理及方法的实现

介绍了国家环保总局汽车空调CFC-12制冷剂回收培训项目的背景、意义,及广东交通职业技术学院在该项目中所做的工作。阐明了汽车空调CFC-12制冷剂回收的机理与方法,经实践证明,该回收方法具有良好的操作性及较大的推广价值。