带引射循环的HFC134a气体水合物蓄冷实验研究  

Experiments on Cool Accumulation with HFC134a Gas Hydratein Injection Circulation

作　　者：杨颖[1] 童明伟[1] 吴治娟[1] 王勇[1] 

机构地区：[1]重庆大学动力工程学院,400030

出　　处：《制冷学报》2004年第4期1-4,共4页Journal of Refrigeration

摘　　要：气体水合物蓄冷是一种安全高效的、适用于空调工况的蓄能技术,为加快HFC134a气体水合物的生成速度,采用一种新型引射器装置来增强反应物混合和扰动。通过对有引射循环与无引射循环两种不同蓄冷工况的实验对比,证实了引射比对成核过冷度和成核引导时间有应变关系,当引射比范围在0.3～0.4之间时,引射循环能有效减小成核过冷度1.5℃,水合物生成时间缩短20～30min,最佳引射比与形成气体水合物的物质质量比接近。水的初始状态对成核过冷度和成核时间有明显影响,形成过水合物的水再次生成水合物的成核时间缩短6～8min,成核过冷度减少1～2℃。The cool accumulation with gas hydrates, suitable for the working mode of air conditioning, is one kind of the safe and high efficient energy storage technologies. In order to speed up the creation of HFC134a gas hydrate, a new kind of injecting device was proposed to enhance the mixing and stirring for reactants. The experimental comparisons on two different cool accumulation operation modes with and without injecting loop, verify that the injecting ratio affects the supercooling degree and induction time for nucleation. When the injecting ratio is given in the range of 0.3-0.4, injecting loop can effectively reduce the nucleation supercooling degree by 1.5℃ and shorten the creation time of hydrate by 20-30min. The optimal injecting ratio is close to the mass ratio of hydrate forming gas materials. Further, the initial state of water also exerts an obvious influence on the supercooling degree and induction time for nucleation. In addition, the re-usage of hydrate formed water can reduce the nucleation time by 6-8min and decrease the nucleation supercooling degree by 1-2℃ for a new turn of gas hydrate forming.

关 键 词：气体水合物蓄冷 空调工况 过冷度 引导时间 显影 成核 循环 增强 新型 量比 

分 类 号：TB657.2[一般工业技术—制冷工程] TB64