【摘要】 由于氢气具有优越的传热和流动特性,有望减少脉管制冷机回热器的流动和传热损失,从而可获得高于纯氦工质的制冷性能。从氢组分对循环热力学性能、流体流动与传热性能等因素的影响角度出发,开展了氢一氦混合工质脉管制冷性能研究,并在30K温区进行了实验验证,获得了比纯氦更好的制冷性能。更多还原

【Abstract】 A better performance of pulse tube coolers ( PTC ) could be possibly achieved by usinghydrogen and helium mixture as working fluid than pure helium, because of the excellent heat transfer and flow characteristics of hydrogen, which improves the performance of the regenerator. Based on the effect of the hydrogen on the thermodynamic performance, heat transfer and flow characteristics of the regenerator, the performance of the PTC at 30 K with hydrogen and helium mixture is investigated both in theory and by experiments , and a better performance than that of pure helium has been obtained.更多还原