风口布置对分层空调系统节能潜力及头脚温差的影响
Effects of diffuser locations on energy saving potential of stratified air conditioning systems and temperature difference between head and foot
摘要：
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。
Abstract：
Based on the energy balance analysis of the cooling coil, demonstrates that the cooling coil load of stratified air conditioning system is inversely proportional to the exhaust air temperature. Separately setting the return and exhaust grilles is beneficial to increase the exhaust air temperature and expel more convective heat generated in the space to the outside directly, which will further reduce the cooling coil load and promote the energy saving potential of the stratified air conditioning system. Experimentally investigates the influence of return grille heights on the performance of stratified air conditioning systems in a climate chamber. The results indicate that when the air returning height decreases from ceiling level to the lower occupied zone, the environmental thermal comfort deteriorates slightly, and the air temperature difference between head and foot increases slightly. Because the return air temperature decreases and the exhaust air temperature increases, the energy saving potential is significantly improved.
Keywords:stratifiedairconditioning,diffuserlocation,energysavingpotential,airtemperaturedifferencebetweenheadandfoot,coolingload,exhaustairtemperature