摘要
为了考察四氢呋喃水合物作为蓄冷介质应用于间接接触换热式蓄冷系统的可行性,对四氢呋喃水合物在单根换热管外的结晶分解过程进行了研究,并与冰的结晶分解动力学特性进行了对比.研究表明:质量分数为19%的四氢呋喃溶液在垂直放置的反应器中被流向为由上向下的冷媒冷却时,其过冷度与诱导时间与水/冰相变过程近似,所需要的冷媒温度可以高于0 ℃,有利于提高蓄冷过程的制冷效率;质量分数高于或低于19%的四氢呋喃溶液,其结晶分解动力学特性不利于蓄冷过程.
In order to investigate if tetrahydrofuran hydrate is suitable to be used as a cool storage medium in indirect-contact heat transfer cool storage system, the kinetics of tetrahydrofuran hydrate formation-decomposition outside of a heat transfer tube was studied, and compared with those of ice formation-decomposition process. The research results show that stoichiometic tetrahydrofuran water solution (19%) has a similar super cooling degree and induction time to those of ice formation when cooled by coolant flowing from up to down in a vertically placed reactor. Since the coolant temperature can be above 0°C, the refrigeration efficiency will be improved comparing with ice. Kinetics of tetrahydrofuran water solution with concentration higher or lower than 19% would deteriorate the cool storage process.
出处
《西安交通大学学报》
EI
CAS
CSCD
北大核心
2005年第3期313-316,共4页
Journal of Xi'an Jiaotong University
基金
广东省自然科学基金重点资助项目
国家重点基础研究发展规划(子课题)资助项目(G2000026306) .
关键词
四氢呋喃
气体水合物
蓄冷
Energy storage
Gas hydrates
Heat transfer
Ice
Phase transitions
Reaction kinetics
