回热型吸附式空调系统三热源模型

THREE-HEAT-SOURCE MODEL ON HEAT-REGENERATIVE ADSORPTION AIR-CONDITIONING SYSTEM

该文着重于回热型吸附空调系统研究的第一部分工作———建模。基于回热型吸附空调系统工作原理和内可逆三热源循环概念 ,文中分析了该系统中热力系与外界相互作用和热力系各工作过程的热平衡 ,建立了该系统的三热源模型。该模型同时采用了热力学第一定律和第二定律 ,并考虑了有限速率传热导致的不可逆性因素 ,故解释了系统制冷系数COP远低于可逆循环的原因。文中给出了一个具体算例说明了此三热源模型的求解 ,并预测系统变工况特性 ,按模型设计的系统样机性能良好 。

This paper is the first part for the research of heat regenerative adsorption air conditioning system (HAAS) modeling.On the basis of the working principle of HAAS and the concept of endoreversible three heat source cycle,the relations between external heat sources and thermodynamic system and the heat balances of working processes are analyzed.A three heat source model for HAAS is established in the paper. The model adopts both the first law and the second law,while the irreversibility caused by finite rate heat transfer is also considered;so it explains clearly why the coefficient of performance (COP)of HAAS is much less than COP of reversible cycle.A typical calculating example for solving the model is presented.The performance of HAAS under varying operating condition is predicted according to the model.Experiment has proved the model agrees with the real system well.Detailed experimental research is introduced in second part of the same work.