Experimental Investigation on an Absorption Heat Transformer for Production of Hot Water or Steam Generation  

作　　者：LIU Feng JING Yang LIU Taixiu SUI Jun XU Yujie 

机构地区：[1]Institute of Engineering Thermophysics,Chinese Academy of Sciences,Beijing 100190,China [2]University of Chinese Academy of Sciences,Beijing 100049,China [3]Shandong Urban and Rural Planning Design Institute,Jinan 250013,China

出　　处：《Journal of Thermal Science》2021年第2期574-584,共11页热科学学报（英文版）

基　　金：The authors gratefully acknowledge the support of the National KeyR&D Program of China(No.2018YFBO905103);the National Natural Science Foundation of China(No.51806213);the Beijing Key Laboratory of Distributed Combined Cooling Heating and Power System;Guangdong Provincial Key Laboratory of Distributed Energy Systems(No.2017DESO5).

摘　　要：The absorption heat transformer is widely used to utilize low-temperature waste heat in the field of distributed energy,industrial processing,and long-distance indoor heating,because it can upgrade energy level and deliver heat to heated medium.In this work,an experimental system of a vertical single-stage LiBr/H2O absorption heat transformer was established to study its performance in the case of producing high-temperature water or low-pressure steam generation under different heating water flow rates.The useful output heat,coefficient of performance,exergy coefficient of performance,and gross temperature lift of the single-stage heat transformer have all been tested.The results show that the absorber cannot directly generate low-pressure steam under the condition of counter-flow heat exchange but can obtain more useful output heat.The largest useful output heat is 20.3 kW,which is higher than that in the case of parallel-flow heat exchange.The generation of low-pressure steam has certain requirements on the mode of heat transfer.The largest internal gross temperature lift of 28.1℃corresponds to the smallest coefficient of performance of 0.22 when the heating water flow rate is 2.1 m3/h.The performance of the single-stage absorption heat transformer can be improved to some extent by increasing the heating water flow rate.

关 键 词：vertical falling film absorber counter flow and parallel flow high-temperature water low-pressure steam exergy coefficient of performance 

分 类 号：TK17[动力工程及工程热物理—热能工程]