办公建筑碰撞射流通风室内热环境特征研究  

Numerical Study of Thermal Environment Characteristics with Impinging Jet Ventilation System in Office Buildings

作　　者：叶梅 陈童 钟珂[2] YE Mei;CHEN Tong;ZHONG Ke(China Haisum Engineering Co.,Ltd.;School of Environmental Science&Engineering,Donghua University)

机构地区：[1]中国海诚工程科技股份有限公司,上海200031 [2]东华大学环境科学与工程学院

出　　处：《建筑热能通风空调》2021年第12期30-34,共5页Building Energy & Environment

摘　　要：利用数值模拟方法研究分析了办公建筑碰撞射流通风的室内温度分布,热舒适性和能耗等热环境特征。结果表明,碰撞射流送风参数L_(m)从1.73减小至0.76时,室内温度分布存在从均匀分布到温度分层的变化过程,且L_(m)越小,温度分层现象更加明显。送风口附近的人员具有较强吹风感,人员工位布置应避免正对送风口,并尽量保证1.2 m以上的送风口距离。此外,本文建立了能量利用率η的拟合公式,可用于评估不同送风参数下办公建筑碰撞射流通风系统的节能潜力。The air temperature distributions,thermal comfort and energy utilization efficiency of impinging jet ventilation(IJV)in office buildings are studied by employing numerical simulations.The results show that the indoor air temperature distribution changes from uniformmixing to thermal stratification with the air supply parameters(L_(m))of IJV decreasing from 1.73 to 0.76,and the smaller the L_(m) is,the more thorough the thermal stratification is.The personnel desk should be arranged to avoid facing the air supply inlet,and a straight distance of more than 1.2 m away from the inlets shall be ensured.Moreover,the fitting formula of energy utilization efficiency is developed in present work,which can be used to evaluate the energy saving potential of IJV system with different air supply parameters in office buildings.

关 键 词：碰撞射流通风 办公建筑 温度分层 PD 能量利用率 

分 类 号：TU834[建筑科学—供热、供燃气、通风及空调工程]