自然循环预冷和低温热管耦合系统的初步实验研究

介绍的高效低温传热方法主要包括 :自然循环冷却法和基于自然循环预冷及低温热管的高效低温冷却方法。自然循环冷却法的特点是在大温差条件下实现物体的快速冷却。一旦被冷却物体到达或接近低温液体的温度 ,将产生循环动力不足的情况 ,必须采用诸如气体引射或容器自增压等方法加以解决。而低温热管的特点在于能在小温差条件下 ,传递大量的热能。文中将自然循环预冷法及低温热管技术有机结合 ,综合自然循环和低温热管的优点 ,取长补短 ,既可以在很短的时间内使被冷却物体的温度降低下来 ,又可以保证被冷却物体的温度波动较小。文中还详细给出了基于自然循环预冷及低温热管的高效低温传热单元的设计及试验结果

Experimental Study on Compound Heat Transfer System of Natural Circulation Cooling and Cryogenic Thermosyphon

A compound heat transfer system which consists of the natural circulation cooling and cryogenic thermosyphon is introduced in this paper. The natural circulation cooling can cool down the object in a large temperature difference, while the cryogenic thermosyphon can transfer more heat within a small temperature difference. In this paper, the compound heat transfer system takes advantages of natural circulation cooling and cryogenic thermosyphon, and eliminates the disadvantage of natural circulation cooling for its low thermodynamic efficiency. In order to verify its performance, a cryogenic heat transfer device was designed and fabricated. Experimental results are compared with those simply cooled by a natural circulation cooling, which show the potential for further applications.