关于排风热回收节能量计算的一个问题

摘要

In the techno-economic analysis of exhaust air heat recovery systems,if the heat exchange between the outdoor air and exhaust air is directly used to calculate energy saving quantity without considering the influence of cooling/heating load and air handling process,there will be a large deviation on calculated value of heat savings in winter.By the analysis of a simulation case,points out the improved calculation method.Proposes that actual reduced heat consumption should be hourly calculated before and after setting heat recovery device,where the air handling process should be considered according to the different air conditioning systems.The energy saving effect of the heat recovery device should be analysed based on the actual amount of heat savings.%在对排风热回收系统进行技术经济分析时，如不考虑房间负荷情况和空气处理过程，视通过热回收装置的新风与排风的换热量为节能量，将导致冬季节热量的计算结果存在较大偏差。通过案例进行分析，提出了改进的计算方法，建议根据空调系统形式，考虑空气处理过程，逐时计算设置热回收装置前后空调系统实际减少的热量消耗，并基于此实际节热量进行热回收装置的节能效果分析。