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Heat and mass transfer through spiral tubes in absorber of absorption heat pump system for waste heat recovery

Propulsion and Power Research 2017年第2期6卷 140-146页

作者： Yoshinori Itaya Masatoshi Yamada Kenji Marumo Nobusuke Kobayashi Environmental and Renewable Energy System Division.Graduate School of Engineering.Gifu University 501-1193 GifuJapa Research and Development Section Morimatsu Research Institute Co.Ltd.1057-1 Yai501-0417 MotosuJapan

Heat and mass transfer of a LiBr/water absorption heat pump system(AHP)was experimentally studied during working a heating-up *** examination was performed for a single spiral tube,which was simulated for heat transfer tubes in an *** inside and outside of the tube were subjected to a film flow of the absorption liquid and exposed to the atmosphere,*** maximum temperature of the absorption liquid was observed not at the entrance but in the region a little downward from the entrance in the *** steam absorption convective heat transfer coefficient between the liquid film flowing down and the inside wall of the temperature and the film temperature at the maximum temperature location and the *** film heat and mass transfer coefficients rose with increasing Reynolds number of the liquid film *** coefficients showed opposite trend to the empirical correlation reported for laminar film flow on a straight smooth tube in a refrigeration mode in the past *** fact can be caused due to a turbulent promotion effect of the liquid in a spiral tube.

关键词： Absorption heat pump a single spiral tube Heat and mass transfer Lithium bromide/water Film heat transfer coefficient Mass transfer coefficient Waste heat recovery

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