提出一种新型溴化锂制冷机发生器,该发生器以热管为热源,使用双螺旋形换热管进行喷淋式换热,具有很好的换热性能。对双螺旋形换热管的降膜蒸发换热进行了实验研究,证实了小倾角下降膜蒸发的稳定性和高效性,并获得了喷淋密度与表面传热系数的实验关联式以及Nu-Re的量纲一公式,为新型制冷机发生器的设计提供了理论基础。 A new lithium bromide refrigerator generator is proposed. The generator uses the heat pipe as a heat source and uses a double spiral heat exchange tube for showering heat exchange, which has good heat exchange performance. The experimental study on falling film evaporation heat transfer of double spiral heat exchange tube was carried out. The stability and high efficiency of film evaporation with small dip angle were confirmed. Experimental correlation between shower density and surface heat transfer coefficient was obtained and Nu- Re’s dimension formula, provides a theoretical basis for the design of a new refrigerator generator.