流体机械

2002, (09) 46-49

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小温差相变传热在太阳能溴化锂吸收式空调系统中的应用
Study on Little Temperature Difference Heat Transfer of Phase Change in Li-Br Solar Energy Absorbing Air-conditioning System

王强,张小艳,郑宏飞,吴裕远
Wang Qiang Zhang Xiaoyan Zheng Hongfei Wu Yuyuan

摘要(Abstract):

针对太阳能驱动的小型溴化锂吸收式空调系统中加热水温度要求较高的特点 ,将LiBr溶液提升管设计成弦月形通道 ,从通道内、外两侧同时加热溶液 ,减小了传热温差 ,降低了溶液过热度 ,使溶液在 70~ 80℃的加热水温度下沸腾并顺利提升 ;蒸发器中采用管外多级降膜蒸发技术 ,在小温差条件下实现相变传热 ,提高了冷剂水的蒸发率 ,解决了太阳能溴化锂吸收式空调系统中冷剂水蒸发不完全的问题。
A new type upgrading solution tube of lunate channel was used in miniature LiBr absorbing air conditioning system driven by solar energy in view of the requirement of higher temperature heating water. When the LiBr solution was heated from inside and outside of the lunate channel, the temperature difference of heat transfer minished efficiently, the superheat of solution decreased, and the solution boiled and upgraded successfully with the heating water of 70~80℃. Multi stage falling evaporation technology outside of the tubes was used in the evaporator. The evaporating efficiency has been increased and the problem of inadequate evaporating in solar energy Li Br absorbing air conditioning system has been solved.

关键词(KeyWords): 太阳能;吸收式空调系统;弦月形通道;降膜蒸发
solar energy;absorbing air conditioning system;lunate channel;falling film evaporation

Abstract:

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基金项目(Foundation): 中国博士后科学基金资助项目 (中博基 [2 0 0 0 ] 2 3号 )

作者(Author): 王强,张小艳,郑宏飞,吴裕远
Wang Qiang Zhang Xiaoyan Zheng Hongfei Wu Yuyuan

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