考虑不同服装热阻的层式通风供暖运行优化研究

Study on Optimization for Operation of Stratum Ventilation for Heating Considering Different Clothing Insulations

摘要:

为满足室内人员在不同着装时的热舒适需求,以某层式通风供暖办公室为研究对象,在考虑不同服装热阻的前提下,通过改进TOPSIS法优化了送风参数(即送风角度、送风速度和送风温度)；在优化过程中,将PMV/PPD、垂直温差、空气龄和能量利用效率作为通风性能评价指标,以送风温度、送风速度、送风角度和服装热阻为设计变量,通过CFD模拟分析,采用中心复合设计响应面法得到通风性能与设计变量间的函数关系,然后用于改进TOPSIS法评估所有可能方案的通风性能以达到提高计算效率的目的；结果表明：基于改进TOPSIS法优化层式通风供暖送风参数可以显著改善通风性能,PPD、空气龄和垂直温差分别平均降低了37.08%、22.46%和48.17%,能量利用效率平均提高了20.42%。

Abstract:

In order to satisfy the requirements of thermal comfort of occupants with different clothes, taking a room heated by stratum ventilation as the research object, and optimizing the ventilation parameters (i.e., supply air velocity, supply vane angle, and supply air temperature) via an improved TOPSIS method under considering different clothing insulations. To reduce costs of computational, the energy utilization coefficient, PMV/PPD, mean age of air, and vertical air temperature difference of head and ankle were taken as ventilation performance evaluation criteria, and supply vane angle, supply air velocity, supply air temperature, and clothing insulation were design parameters. The CFD simulation analysis is performed by means of the central composite design response surface method to obtain the functional relationship between the ventilation performances and the design parameters and was then used to evaluate the ventilation performance of all possible operations. The results demonstrate that optimization on the ventilation parameters via the improved TOPSIS method can significantly improve ventilation performance. The vertical air temperature difference between head and ankle levels, the mean age of air, and the PPD decreased by 48.17%, 22.46%, and 37.08% on average, respectively, and an average increase in the energy utilization coefficient by 20.42%.