低位空调应用于住宅建筑中的节能和舒适性实验

为研究低位送风的空调形式应用于住宅建筑的节能效应及舒适性水平，在模拟卧室的实验室里分别对传统的高位空调（CAC）和低位空调（FAC）在设定室内温度相同的情况下测量其温度场和速度场，通过ADPI指标评价两种空调形式的舒适性水平；同时，对利用功率测试仪器测得的功率以及送回风的干湿球温度计算得到的两种系统不同工况下的COP值进行了比较．实验结果表明，低位空调的送风温度要高于同等工况下高位空调送风温度2．6—8.3℃，而ADPI值在大多数工况下也能满足ASHRAE要求的室内舒适性水平，尽管在实验的极端工况下略低于传统的高位空调的ADPI值．功率测试及COP计算结果表明，使用低位送风的空调系统要比使用传统的空调系统耗功平均减少14．9％，COP平均值由2．5提高到3．25，提高了29．6％．

Energy Efficiency and Comfort Level of Floor-Based Air-Conditioning in Residential Buildings

To investigate the feasibility of locating the air-conditioner at low level in residential buildings, contrastive experiments were carried out in laboratory. The air temperature fields and the velocity fields were tested in a bedroom-type chamber equipped with ceiling-based air-conditioning （CAC） and floor-based air-conditioning （FAC） respectively. Furthermore, the air diffusion performance index （ADPI） was used to evaluate the thermal comfort level of the room, while energy efficiencies of the systems were compared by the power consumption and the COP. It is indicated that the supply air temperature of FAC is 2.6 -8.3℃ higher than that of CAC, while the ADPI of FAC can also meet the thermal comfort level recommended by ASHRAE in most conditions, although it is a little lower than CAC sometimes. The results of power measurement show that the average power consumption of FAC can save 14.9% than that of CAC, while the average COP increases by 29.6% from 2.5 to 3.25.