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Micro technology in heat pumping systems

机译:热泵系统中的微技术

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Micro heat pumps, with dimensions in the order of centimetres, may in the future be utilised for the heating and/or cooling of buildings, vehicles, clothing, and other products or applications. A number of issues have yet to be solved, including the construction of a microscale compressor, and determination of micro heat exchanger heat transfer capacities. Test samples of micro heat exchangers and a corresponding test apparatus have been built. Some two-phase experiments have been conducted. Preliminary results for a micro condenser with 0.5 mm wide trapezoidal channels of 25 mm length showed that a heat flux of 135 kW/m~2, based on the refrigerant-side area, was attainable. The corresponding overall heat transfer coefficient was 10 kW/(m~2K), with a refrigerant-side pressure drop of 180kPa/m.
机译:将来,尺寸约为厘米的微型热泵可用于建筑物,车辆,衣物和其他产品或应用的加热和/或冷却。许多问题尚未解决,包括微型压缩机的构造以及微型热交换器传热能力的确定。已经建立了微型热交换器的测试样品和相应的测试设备。已经进行了一些两阶段实验。对于具有25 mm长的0.5 mm宽梯形通道的微型冷凝器的初步结果表明,基于制冷剂侧面积,可达到135 kW / m〜2的热通量。相应的总传热系数为10 kW /(m〜2K),制冷剂侧压降为180kPa / m。

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