某报告厅利用自然冷源被动通风降温的理论计算与模拟分析

摘要

该文拟利用被动复合式下向通风降温技术在过渡季节对武汉某高校报告厅室内热环境进行研究,首先根据武汉市气候条件确定过渡季节该报告厅的室内外设计参数,然后通过理论计算确定报告厅采用该技术通风降温的可行性,最后利用计算流体力学( CFD)软件Airpak对过渡季节室内气流组织进行模拟和分析,验证该设计方案的通风效果.由于报告厅进深较大,为了保证其室内温度和风速分布均匀,该文分别对单向和双向两种送排风方案进行了比较研究,结果证明该系统能够替代常规空调解决武汉地区过渡季节利用自然冷源对报告厅的通风降温,不仅节约了能源,还改善了室内空气品质.%Passive hybrid downdraught cooling technique is supposed to be used in a schematic design of university auditorium in Wuhan transition season . Firstly the indoor and outdoor design parameter is set; Secondly the feasibility of using PHDC technique is discussed according to theoretical arithmetic; Lastly, according to Airpak CFD simulation and analysis, the indoor ventilation effect is checked. Because the auditorium is deep-plan , single-sided and double-sided ventilation schemes were compared in this study in order to get evenness index of the indoor temperature and wind velocity . The result proves that PHDC system can replace conventional air-conditionings to solve auditoriums ventilation by using natural cold source during transition season in Wuhan.Not only can energy be saved, but also can indoor air quality be improved.