摘要
研究表明 ,弦月形通道的特殊结构可以有效促进Li-Br溶液的沸腾 ,降低溶液过热度 ,强化传热、传质过程 ,相同工况下的换热量是环形通道的 2~ 3倍 ,使太阳能小型溴化锂吸收式空调系统在 70~ 80℃加热水温度下就可以正常运行。弦月形通道偏心特性尺寸S对通道内Li-Br溶液的流动与换热影响很大 ,实验结果表明 :di=19mm和d0 =32mm的铜管构成的弦月形通道的提升效果较好。
Researches indicate that the special structure for lunate channel can efficiently accelerate boil of Li-Br solution, decrease the superheat of solution, and enhance heat and mass transfer. The quantity of heat transfer is about 2~3 times higher with lunate channel than with round channel under the same conditions. This made it possible that miniature Li-Br absorbing air-conditioning system operates normally with the heating water of 70~80℃. The misalignment characteristics of the lunate channel greatly affect the flowing and heat transfer of Li-Br solution. The experimental results show that the lunate channel with d i=19mm, d 0=32mm has the better upgrading effects.
出处
《制冷学报》
CAS
CSCD
北大核心
2003年第1期18-22,共5页
Journal of Refrigeration
基金
国家自然科学基金资助项目 (5 0 1760 3 6)
关键词
弦月形通道
太阳能空调系统
强化传热
无泵溴化锂吸收式制冷机
refrigeration and cryogenic engineering, enhanced heat transfer, lunate channel, solar energy air-conditioning