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层式通风是一种适用于中小空间的新型气流组织形式,有潜力用于高效夏季供冷冬季供暖。本文采用实验数据验证的标准k-ε模型,数值模拟分析送风角度对送回风口同侧布置的层式通风冬季供暖效果的影响。结果表明:送风角度能明显影响层式通风供暖室内空气速度和温度分布,能量利用效率以及室内热舒适水平。基于建立的能量利用效率与送风角度函数关系,得出最佳送风角度为水平向下约30°,此时能量利用效率高达1.28,热舒适评价指标PMV、PPD、PD以及头脚温差均满足标准ASHRAE 55-2013要求。
Layer ventilation is a new type of airflow organization suitable for small and medium-sized spaces, with the potential for efficient summer cooling and winter heating. In this paper, the standard k-ε model validated by experimental data is used to analyze the effect of air supply angle on the effect of winter ventilation in layered ventilation on the same side of return tuyere. The results show that air supply angle can significantly affect indoor air velocity and temperature distribution, energy utilization efficiency and indoor thermal comfort level. Based on the relationship between the energy utilization efficiency and the air supply angle function, the optimal air supply angle is about 30 ° downwards and the energy efficiency is as high as 1.28. The thermal comfort index PMV, PPD, PD and temperature difference between head and foot Meet the standard ASHRAE 55-2013 requirements.