Numerical study on heat blocking efficiency of non-recirculating air curtain and its optimal discharge velocity
Numerical study on heat blocking efficiency of non-recirculating air curtain and its optimal discharge velocity
复制标题
非循环风幕隔热效率及其最佳排出速度的数值研究
DOI：
10.1051/e3sconf/201911103042
复制
发表时间：
2019
期刊：
影响因子：
--
通讯作者：
Sihwan Lee
中科院分区：
文献类型：
--
作者：
Akashi;Y.;Miyazaki;T.;Maeda;H.;Shibata;Y.;Ishida H.;李時桓;Sihwan Lee
从降低能耗的角度来看，门开时空调运行对建筑物都有问题。为了解决这个问题，利用了前厅、旋转门、风幕等多种入口设施。在这些设施中，风幕通过排出开口周围的宽阔空气来切断室内外空气，从而防止室内的热量损失。本研究的目的是评估非循环气幕的阻热效率，并评估其最佳排风速度。为了实现这一目标，采用瞬态CFD模拟方法研究了单侧开口在不同区域空气温差下的入渗速率，并与稳态计算方法进行了比较。此外，为了评价非循环气幕的阻热效率，建立了计算模型，并对几种不同排风速度的情况进行了比较。结果表明：气幕排出的空气会引起高温区向低温区偏转，且偏转随排出风速的增大而减小；在本研究中，计算出非循环风幕挠度模量的安全系数为2.75。
From the point of view to reduce energy consumption, door open while air conditioner running on buildings have a problem. To solve the problem, many facilities for entrance with vestibule, revolving door, and air curtain are utilized. Among the facilities, the air curtain cuts off the indoor and outdoor air by discharging the wide air surrounding the opening, thereby preventing the heat loss from the indoor. The purpose of this study is to evaluate the heat blocking efficiency of non-recirculating air curtain and to evaluate its optimal discharge velocity. To achieve this goal, the infiltration rate across the single-side opening were investigated with air temperature differences between areas by transient CFD simulation and the results were compared with the steady-state calculation method. In addition, to evaluate the heat blocking efficiency of non-recirculating air curtain, the calculation model was set up and several cases with discharge velocity were compared. The results show that the discharged air from the air curtain causes a deflection from the high temperature area to the low temperature area, and the deflection decreases with increasing the discharge air velocity. In this study, the safety factor for deflection modulus of the non-recirculating air curtain was calculated 2.75.