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基于能量平衡分析,阐明了分层空调系统制冷机组所承担的冷负荷与排风温度的反比关系。将回风口与排风口分开布置,有利于排风气流带走更多室内对流得热量,从而提高排风温度,减少制冷机组所承担的冷负荷,提高系统的节能潜力。在人工气候室内,对不同回风高度下分层空调系统的性能进行了实验研究。结果表明:随着回风高度由房间顶部下降至人体活动区域,环境热舒适性变化不大,人体头脚高度的空气温差略有增大;同时,由于回风温度降低,排风温度升高,系统节能潜力显著提高。
Based on the energy balance analysis, the inverse relationship between cooling load and exhaust air temperature of the air-conditioning system refrigeration unit is expounded. The return air vents and exhaust vents are arranged separately, which is conducive to exhaust air flow to take away more indoor convection heat, thereby increasing the exhaust temperature, reduce the cooling unit bear the burden of cooling and improve the system’s energy saving potential. In artificial climate chamber, the performance of stratified air-conditioning system under different return air levels was experimentally studied. The results show that: with the return air height from the top of the room down to the human activity area, the environmental thermal comfort little change, human head and foot height of the air temperature slightly increased; the same time, as the return air temperature decreased exhaust temperature , The potential for energy saving of the system is significantly increased.