Study Of Heat Transfer Coefficients Of LiBr Absorption Heat Pump

Among the many energy saving technologies, the absorption heat pumpheat recovery has a significant economic characteristics and is compelling.Especially it could upgrade the low-temperature heat capacity tohigh-temperature heat. And absorption refrigeration and heat pump systems havemany advantages such as low noise, stable operation, environmental pollution,etc. There is a trend to alternate the vapor compression refrigeration s in recentyears, which making the absorption refrigeration and heat pump systems havemore and more attention and application in the world.In the lithium bromide (LiBr) absorption heat pump design, the formulaselection of heat transfer calculation is difficult and the calculated accuracy islow. For this, the paper studies all the heat transfer coefficients. Firstly, theywere got when previous experimental data were discrete and dimensionalanalysis based on a large number of literature of the solution heat exchangertube surface heat transfer coefficient dimensionless correlation characteristicsand inner generator tube heat transfer coefficient correlations of lithium bromideabsorption heat pump using MATLAB tool fitting within. Secondly, because of the complexity of heat and mass coupling and Marangoni Effect, it is essential tostudy the outer absorber tube surface heat transfer coefficient through theestablishment of the experimental system. According to the theoretical basis ofabsorb condensation falling film, dimensionless heat transfer coefficientcorrelation was carried out. The average relative error of each correlation thesisgave is less than3%, which could meet the requirements of industrial design.The results show that the calculation precision can satisfy the needs ofengineering. These correlations will provide a high efficient and practical toolfor heat transfer calculation of lithium bromide (LiBr) absorption heat pump.