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首页> 外文会议>NATO Advanced Study Institute on Microscale Heat Transfer: Fundamentals and Applications in Biological and Microelectromechanical Systems >BINARY-FLUID HEAT AND MASS TRANSFER IN MICROCHANNEL GEOMETRIES FOR MINIATURIZED THERMALLY ACTIVATED ABSORPTION HEAT PUMPS
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BINARY-FLUID HEAT AND MASS TRANSFER IN MICROCHANNEL GEOMETRIES FOR MINIATURIZED THERMALLY ACTIVATED ABSORPTION HEAT PUMPS

机译：微通道几何形微型热激活吸收热泵中的二进制流体热量和传质

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International interest in the global climate change problem has focused renewed attention on the development of novel thermal systems that reduce the environmental impact of energy consumption in the space-conditioning, chemical processing and other energy-intensive industries. One response to this problem is the use of absorption heat pumps, which are environmentally sound and energy-efficient alternatives to CFC-based, ozone-depleting space-conditioning systems. These thermally activated systems are powered by recuperated waste heat or are gas-fired, as opposed to the electrical energy required for vapor compression systems, thus resulting in high energy efficiencies, They also have fewer moving parts. The principle of operation, illustrated in Figure 1, is as follows: thermal energy is used to boil a refrigerant from a concentrated refrigerant-absorbent solution in a generator at high pressure. The refrigerant is condensed using ambient air as the heat sink, and expanded to a low pressure across a valve. At this low pressure, the refrigerant is cold enough to effect space-conditioning as it evaporates in the evaporator, thus cooling room air. The evaporated refrigerant is combined with the dilute solution in an absorber releasing the heat of absorption, from where it is pumped back in liquid form to the generator, which requires orders of magnitude less electrical energy than the compression of the refrigerant vapor in conventional systems. This thcrmodynamic cycle can also be urn in the heating mode in winter, with the evaporator coupled to the outdoor air to withdraw heat from the ambient, and the condenser and absorber coupled to the indoor air to provide space heating.
机译：国际气候变化问题的国际兴趣重点关注新型热系统的发展，减少了空调，化学加工等能源密集型产业的能量消耗环境影响。对该问题的一个响应是使用吸收热泵，这些吸收热泵是基于CFC的臭氧耗尽空调系统的环保和节能替代。这些热激活的系统由恢复的废热供电，或者是燃气压缩系统所需的电能而通电，从而导致高能量效率，它们也具有更少的移动部件。图1中所示的操作原理如下：热能用于在高压下从发电机中的浓缩制冷剂吸收溶液中煮沸制冷剂。制冷剂使用环境空气作为散热器冷凝，并在阀门上扩展到低压。在这种低压下，制冷剂足够冷，以实现蒸发器中蒸发的空间调节，从而冷却室空气。蒸发的制冷剂与吸收热量的吸收剂中的稀释溶液组合，从将其以液体形式泵送到发电机的位置，这需要比传统系统中的制冷剂蒸汽的压缩更少的电能。该ThCrM动力学循环也可以在冬季加热模式中的URN，蒸发器连接到室外空气以从环境温度中取出热量，并且冷凝器和吸收器连接到室内空气以提供空间加热。

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