送风口间距对层式通风热舒适性能影响的研究

Investigations into the Influence of Air Inlet Spacing on Thermal Comfort of Stratum Ventilation

本文使用标准k-ε湍流模型对层式通风房间进行模拟计算,并对其进行实验验证,结合速度场,温度场及热舒适性分析,研究了六种不同送风风口间距层式通风性能的影响。研究结果表明:层式通风房间送风风口间距会影响多股送风射流间的相互作用,从而影响室内的气流组织分布,导致工作区内不同区域的热舒适差异。随着风口间距的增加,工作区的预测评价热感觉投票PMV和有效通风温度EDTS先减少后增加呈二次函数关系,即工作区内热舒适性先逐渐改善后降低。950mm风口间距下的PMV和EDTS绝对值均最小,工作区最接近于热中性环境,故可作为最佳送风口间距。

The standard k-ε turbulence model was used to simulate air distribution, which was validated by experiments. Combined with the analysis of velocity field, temperature field and thermal comfort, the influence of six different air inlet spacing on thermal comfort performance of stratum ventilation was studied. The results indicate that the air inlet spacing in a stratum ventilation room can affect the interaction between multiple air supply jets, thus affecting the indoor air distribution, resulting in thermal comfort differences in different areas of the occupied zone. With the increase of air inlet spacing, PMV and EDTS decreased firstly and then increased, showing a quadratic relationship,that is, thermal comfort in the occupied zone improved firstly and then decreased. The absolute values of PMV and EDTS are the smallest with the air inlet spacing of 950 mm, where the occupied zone is closest to the thermally neutral environment, so it can be used as the optimal air inlet spacing.