不同建筑分层空调系统风口布置的优化研究
Diffuser layout optimization of stratified air distribution system in different types of buildings
摘要：
通过实验数据验证数学模型后，模拟研究了分层空调系统应用于不同类型建筑空间时风口布置对环境热舒适性和系统节能潜力的影响。结果表明：当分层空调系统应用于小型建筑空间时，需要注意回风口的诱导作用对室内气流组织的影响，避免形成“冷量短路”现象而引起热舒适问题；当分层空调系统应用于水平跨度较大的高大建筑空间时，应尽可能将送风口围绕人体活动区域均匀布置，以提高建筑下部空间气流组织的均匀性和环境热舒适性；将回风口布置在人体活动区域温度较低的位置，能够有效减小分层空调系统的制冷机组负荷；同时，增强室内空气沿外围护结构的贴附热羽流流动，也有利于提高系统的节能潜力。
Abstract：
With a validated simulation model, investigates the influence of diffuser layout on the thermal comfort and energy saving potential of stratified air distribution (STRAD) systems applied to different types of building spaces. The results indicate that for small buildings, the induction effect of the return air inlets on the indoor air distribution should be noticed to avoid the thermal comfort problems caused by “short circuit” phenomenon of the cold air. But for large space buildings with wide horizontal span, air supply diffusers should be arranged surrounding the occupied zone as uniform as possible, so as to improve the uniformity of the indoor air distribution and the thermal comfort in the lower zone. The return air inlets should be designed to the low air temperature area of lower occupied zone, in order to reduce the cooling load and improve the energy saving capacity of the STRAD systems. Furthermore, the enhancement of the thermal plume flow along with exterior walls is beneficial for further energy conservation of the STRAD systems.
Keywords:stratified air distribution, building space, diffuser location, thermal comfort, cooling load, energy saving