开式吸收式热泵降膜吸收器热质传输研究  被引量:8

ANALYSIS OF HEAT AND MASS TRANSFER OF THE FALLING FILM ABSORBER IN THE OPEN CYCLE ABSORPTION HEAT PUMP

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作  者:魏潘 肖云汉[1] 张士杰[1] 

机构地区:[1]中国科学院工程热物理研究所先进能源动力技术实验室,北京100080 [2]天津城市建设学院能源与机械系,天津300384

出  处:《太阳能学报》2009年第5期591-595,共5页Acta Energiae Solaris Sinica

基  金:国家自然科学基金(50606036);国家重点技术基础(973)研究计划(No.2007CB210102);国家高技术(863)研究发展计划(No.2007AA05Z238)

摘  要:针对开式循环吸收式热泵系统中的吸收器,建立了竖直管降膜式吸收器模型,分析了吸收器内部的热质传输规律,并将拟合的传质系数与实验结果进行了比较。计算结果表明,溶液浓度升高最利于水蒸汽吸收,溶液温度升高有利于热的回收利用,增大降膜管径及增加降膜管长度均利于吸收过程的进行。计算结果可为此类吸收器的设计提供参考。A falling film absorber was selected in this paper for the open cycle absorption heat pump which is used to recycle the latent heat and water in the flue gas from gas boiler or humid gas cycle (HAT cycle). A steady-state model was developed and the heat and mass transfer processes was simulated. Comparing to the experimental results, the heat and mass transfer coefficients predicted from empirical correlations was reasonable. A parametric analysis was also conducted, the results showed strong solution concentration is beneficial to water absorption and high solution temperature is beneficial to heat recycle. The absorption process would be strengthen by increasing the diameter or the length of the tube, which can give a reference to the absorption design.

关 键 词:开式吸收式热泵 降膜吸收器 传热传质 模型 

分 类 号:TK123[动力工程及工程热物理—工程热物理]

 

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