复合空调系统三种运行模式的室内热环境研究  

Research on Indoor Thermal Environment under Three Operational Modes of Hybrid Air-conditioning System

作　　者：袁锋[1] 赵蕾[1] 

机构地区：[1]西安建筑科技大学环境与市政工程学院

出　　处：《建筑热能通风空调》2007年第5期35-38,共4页Building Energy & Environment

基　　金：陕西省教育厅专项科研计划项目(05JK252)

摘　　要：本文以办公室为研究对象,采用数值仿真方法研究了置换通风与顶板辐射复合空调系统三种运行模式在不同冷负荷条件下的室内热环境。结果表明,联合运行模式下,热舒适性最好,且冷板表面结露的危险小于顶板辐射单独供冷;在负荷较小的情况下,三种运行模式均能保证室内热舒适要求,且联合运行模式的通风效率与置换通风单独运行相当;在负荷较大的情况下,采用置换通风模式,室内垂直温度梯度增大,当负荷大到某一程度时,垂直温度梯度将超过3℃/m,表明其单独运行将无法满足热舒适性要求;顶板辐射单独运行可以满足热舒适性要求,但冷板表面结露的危险性增大;联合运行的通风效率小于置换通风模式,且随着室内冷负荷的增加,单独置换通风和联合运行模式的通风效率均有降低的趋势。Indoor thermal environment of an office was studied by numerical simulation under three operational modes of hybrid air-conditioning system of Displacement Ventilation （DV） and Chilled Panel （CP） with different loads. Result shows that the thermal comfort conditions of hybrid system operated jointly is the best, and the risk of condensation is lower than that in CP. If cooling load is low, then indoor thermal comfort can be ensured by any of the three operational modes, and the ventilation efficiency of hybrid system is about equivalent to that of DV. If the cooling load is high, indoor vertical temperature gradient increases as load increases, which will exceed 3℃/m and can not satisfy the desire of thermal comfort, when the DV operates individually. CP operates individually can meet the needs of thermal comfort, while the possibility of condensation improves. Ventilation efficiency of hybrid system is lower than that of DV operating individually in higher load, and they all will decrease while the load increases.

关 键 词：置换通风 顶板辐射 温度梯度 舒适性 通风效率 结露 

分 类 号：TU831.3[建筑科学—供热、供燃气、通风及空调工程]