过渡季节VAV空调系统送风温度的优化控制策略

变风量空调系统中，如何在良好室内空气品质与节能之间进行权衡一直是研究的难点．通过对多区域变风量空调及其控制系统进行分析研究，按照ASHRAE通风标准对新风量的要求，针对混和送风系统提出并在Tmsys仿真平台上分析了送风温度优化控制方案在不同负荷条件下的控制效果．研究结果表明，室外新风温度低于室内温度设定值时，送风温度的设定值受到设计风量和运行时刻各个空调区域风阀开度大小的限制．当过渡季节早晚的新风温度低于室内设定温度的工况时，若将送风温度由13℃升高到16℃，不但可以减少2．8％的空调系统能耗，而且有助于改善空气品质．

Optimal Control Strategy of Supply Air Temperature for VAV Air-Conditioning Systems Under Transition Season

For variable air volume （VAV）systems, it＇s a key issue to reduce the energy consumption while the indoor air quality （IAQ） remains good. Based on the study of multi-zone building and VAV air-conditioning systems and the requirement of ASHRAE Standard, a supply air temperature （SAT） reset control strategy for the mixing systems was presented and evaluated. The performance of outdoor air distribution of multi-zone and energy consumption of systems while using this strategy was analyzed. The results show that SAT is limited by the design capacity of supply air and the damper positions of air conditioned zones. When the temperature of outdoor air is lower than the indoor setting value, the SAT-reset control strat- egy can save 2.8% of the daily energy consumption and improve the indoor air quality.