不同气候区居住建筑机械通风热回收性能评估
Performance evaluation of heat recovery in mechanical ventilation of residential buildings in different climate zones
摘要：
采用EnergyPlus软件建立了不同气候区使用机械通风的住宅模型，通过实验测试验证了通风量和能耗模拟的准确性。模拟了不同额定热回收效率下无热回收、显热回收、全热回收的全年空调能耗及其运行费用，分析了不同热回收效率下的节能效果及采用热回收装置的回收期。研究发现：严寒、寒冷地区采用显热、全热回收均能降低20%左右的能耗，夏热冬冷地区和夏热冬暖地区显热回收无效果，温和地区不管采用何种热回收形式均无效果；基于当前热回收设备的初投资价格，5个气候区居住建筑采用机械通风热回收装置的初投资回收期均在15 a以上，从经济角度考虑不可行。
Abstract：
This paper adopts EnergyPlus software to establish a typical residential model with mechanical ventilation in different climate zones of China, and the accuracy of ventilation and energy consumption simulation is verified by experimental tests. The annual energy consumption and operating cost of the air conditioning system without heat recovery, sensible heat recovery and total heat recovery under different rated heat recovery efficiencies are simulated, and the energy saving effect under different heat recovery efficiencies and the payback periods of heat recovery facilities are analysed. It is found that the sensible heat recovery and total heat recovery in the severe cold and cold zones can reduce energy consumption by about 20%, sensible heat recovery in the hot summer and cold winter zone and the hot summer and warm winter zone has no effect, and no heat recovery method works in the mild zone. Based on the current initial investment of the household heat recovery facilities, the payback periods of heat recovery facilities for residential buildings in the five climate zones is all more than 15 years, which is not economically acceptable.
Keywords:mechanicalventilation;heatrecovery;climatezone;residentialbuilding;energyconsumption;operatingcost;energysavingrate;paybackperiodofinitialinvestment