风压通风中排风风帽的影响

doi:10.3785/j.issn.1008-973X.2023.03.017

浙江大学学报(工学版)

2023, Vol. 57

Issue (3): 591-597 DOI: 10.3785/j.issn.1008-973X.2023.03.017

土木工程

风压通风中排风风帽的影响

何国青(

),唐艺甜

浙江大学建筑工程学院，浙江杭州 310058

Influence of exhaust wind cowls on wind driven ventilation

Guo-qing HE(

),Yi-tian TANG

College of Civil Engineering and Architecture, Zhejiang University, Hangzhou 310058, China

全文: PDF(1381 KB) HTML

摘要：

为了研究建筑高位排风口排风时风压影响因素以及风帽的作用，设计太阳能烟囱建筑缩尺模型，通过风洞试验，对比普通弯管出口和2种风帽（百叶型和挡板型）对建筑风压分布及烟囱内通风量的影响. 结果表明：在梯度风下，进出口高度差对风压通风的影响不可忽视，当出口位置高于入口位置时，出口处风压往往大于入口处风压. 当屋顶普通弯管出口遇到迎面风向时，产生的与烟囱热羽流方向相反的倒灌通风会破坏烟囱的气流组织设计. 2种风帽均可阻止气流倒灌，其中挡板型风帽综合性能更优. 通风量除了在侧风向低于弯管出口28%外，在迎风和背风方向上均为三者最大，并分别高出弯管出口57%与33%. 在包括太阳能烟囱在内的建筑高位排风设计中，除了入口应尽量处于主流风向的迎风面外，出口应布置在高位，并推荐使用挡板型风帽.

关键词： 风帽; 太阳能烟囱; 风压通风; 风洞实验; 梯度风; 开口布置

Abstract:

A scaled model of solar chimney building was designed and tested in a wind tunnel, to investigate the impact of wind pressure related factors and wind cowls on the discharging performance of high exhaust of a building. A comparison study between a common elbow outlet and two wind cowls (a louver type and a baffle type) was conducted to investigate their influences on wind pressure distributions and the resulting ventilation rate. Results show that under the gradient-profiled wind, the influence of the net height difference between the inlet and outlet on the ventilation rate cannot be ignored. The resulting wind pressure at the high exhaust was in general greater than that of the lower inlet. When the roof-mounted elbow outlet was facing the wind, the reverse flow occurred, which was against the chimney flow and weakened the stack ventilation design. Both wind cowls prevented the reverse flow. However, the baffle type was superior to the other. It produced the largest ventilation rate among the three outlets except for the side-wind case, where its flow rate was 28% lower than that of the elbow outlet case. The flow rate of the baffle type outlet was 57% and 33% higher than that of the elbow outlet in the windward and leeward directions, respectively. In the design of building ventilation systems with high exhaust, such as solar chimneys, the inlet needs to be placed at windward side as much as possible, while the outlet needs to be placed as high as possible. And the baffle type wind cowl is recommended.

Key words: wind cowl solar chimney wind driven ventilation wind tunnel test gradient wind openings arrangement

收稿日期: 2022-02-21 出版日期: 2023-03-31

CLC:

TU 18

基金资助: 国家自然科学基金资助项目（51678518）

作者简介: 何国青（1975—），男，教授，博士，从事建筑环境和节能研究. orcid.org/0000-0002-7667-2335. E-mail： guoqinghe@zju.edu.cn

	服务
	把本文推荐给朋友
	加入引用管理器
	E-mail Alert
	作者相关文章
	何国青
	唐艺甜

引用本文:

何国青,唐艺甜. 风压通风中排风风帽的影响[J]. 浙江大学学报(工学版), 2023, 57(3): 591-597.

Guo-qing HE,Yi-tian TANG. Influence of exhaust wind cowls on wind driven ventilation. Journal of ZheJiang University (Engineering Science), 2023, 57(3): 591-597.

链接本文:

https://www.zjujournals.com/eng/CN/10.3785/j.issn.1008-973X.2023.03.017 或 https://www.zjujournals.com/eng/CN/Y2023/V57/I3/591

图 1 风洞实验布局

图 2 太阳能烟囱建筑模型及测点分布

图 3 风帽模型及测点分布

图 4 风洞实验中的5种风剖面 (参考高度为0.45 m)

表 1 进出口中心位置处的风压比较(参考风速为5 m/s)

图 5 梯度风作用下2种模型的表面风压系数比较

图 6 均匀流作用下正方体模型表面风压系数[21]

图 7 房间进出口布置以及4个风向角

图 8 进出口不同方位布置下的体积流量

表 2 不同出口形式的房间进出口处内侧压强（参考风速为5 m/s）

图 9 3种排风口下体积流量和参考风速的关系

1	HONG S, HE G, GE W, et al Annual energy performance simulation of solar chimney in a cold winter and hot summer climate[J]. Building Simulation, 2019, 12 (5): 847- 856 doi: 10.1007/s12273-019-0572-y
2	KONG J, NIU J, LEI C A CFD based approach for determining the optimum inclination angle of a roof-top solar chimney for building ventilation[J]. Solar Energy, 2020, 198: 555- 569 doi: 10.1016/j.solener.2020.01.017
3	张明杰, 郜志多层建筑太阳能烟囱的全年通风潜力评价[J]. 西安建筑科技大学学报: 自然科学版, 2021, 53 (2): 283- 288 ZHANG Ming-jie, GAO Zhi Evaluation of the annual ventilation potential of solar chimneys for multi-story buildings[J]. Journal of Xi'an University of Architecture and Technology: Natural Science Edition, 2021, 53 (2): 283- 288
4	HIRUNLABH J, KONGDUANG W, NAMPRAKAI P, et al Study of natural ventilation of houses by a metallic solar wall under tropical climate[J]. Renewable Energy, 1999, 18 (1): 109- 119 doi: 10.1016/S0960-1481(98)00783-6
5	BANSAL N K, MATHUR R, BHANDARI M S Solar chimney for enhanced stack ventilation[J]. Building and Environment, 1993, 28 (3): 373- 377 doi: 10.1016/0360-1323(93)90042-2
6	SANDBERG M. Cooling of building integrated photovoltaics by ventilation air [EB/OL]. [2022-04-07].　https://www.aivc.org/sites/default/files/airbase_12533.pdf.
7	CHEN Z D, BANDOPADHAYAY P, HALLDORSSON J, et al An experimental investigation of a solar chimney model with uniform wall heat flux[J]. Building and Environment, 2003, 38 (7): 893- 906 doi: 10.1016/S0360-1323(03)00057-X
8	HE G, ZHANG J, HONG S A new analytical model for airflow in solar chimneys based on thermal boundary layers[J]. Solar Energy, 2016, 136: 614- 621 doi: 10.1016/j.solener.2016.07.041
9	HE G A general model for predicting the airflow rates of a vertically installed solar chimney with connecting ducts[J]. Energy and Buildings, 2020, 229: 110481 doi: 10.1016/j.enbuild.2020.110481
10	HE G, WU Q, LI Z, et al Ventilation performance of solar chimney in a test house: field measurement and validation of plume model[J]. Building and Environment, 2021, 193: 107648 doi: 10.1016/j.buildenv.2021.107648
11	ZAMORA B, KAISER A S Numerical study on mixed buoyancy-wind driving induced flow in a solar chimney for building ventilation[J]. Renewable Energy, 2010, 35 (9): 2080- 2088 doi: 10.1016/j.renene.2010.02.009
12	CHIU Y H, ETHERIDGE D W Experimental technique to determine unsteady flow in natural ventilation stacks at model scale[J]. Journal of Wind Engineering and Industrial Aerodynamics, 2004, 92 (3/4): 291- 313
13	HOSIEN MA, SELIM S M Effects of the geometrical and operational parameters and alternative outer cover materials on the performance of solar chimney used for natural ventilation[J]. Energy and Buildings, 2017, 138: 355- 367 doi: 10.1016/j.enbuild.2016.12.041
14	NEVES L O, MARQUES DA SILVA F Simulation and measurements of wind interference on a solar chimney performance[J]. Journal of Wind Engineering and Industrial Aerodynamics, 2018, 179: 135- 145 doi: 10.1016/j.jweia.2018.05.020
15	SHI L Impacts of wind on solar chimney performance in a building[J]. Energy, 2019, 185: 55- 67 doi: 10.1016/j.energy.2019.07.056
16	李丹. 风口、风帽强化自然通风效果的理论基础研究 [D]. 西安: 西安建筑科技大学, 2004. LI Dan. The scientific basis about efficient shutters and hoods for natural ventilation [D]. Xi'an: Xi'an University of Architecture and Technology, 2004.
17	KALANTAR V Numerical simulation of cooling performance of wind tower (Baud-Geer) in hot and arid region[J]. Renewable Energy, 2008, 34 (1): 246- 254
18	吕维勋, 吴妍, 臧建彬基于捕风器的建筑被动通风性能研究[J]. 建筑科学, 2021, 37 (6): 137- 142 LYU Wei-xun, WU Yan, ZANG Jian-bin Study on passive ventilation performance of buildings using wind catcher[J]. Building Science, 2021, 37 (6): 137- 142
19	郭春信风帽的合理设计可强化地下空间自然通风[J]. 地下空间, 1994, 14 (1): 33- 37 GUO Chun-xin The reasonable design of hood can strengthen the natural ventilation of underground space[J]. Underground Space, 1994, 14 (1): 33- 37
20	FRANKE J, HELLSTEN A, SCHLÜNZEN H, et al. Best practice guideline for the CFD simulation of flows in the urban environment: action 732 [R]. Brussels: COST Office, 2007.
21	CASTRO I P, ROBINS A G The flow around a surface-mounted cube in uniform and turbulent streams[J]. Journal of Fluid Mechanics, 1977, 79 (2): 307- 335 doi: 10.1017/S0022112077000172
22	任秀宏. 热压驱动太阳能烟囱与室内空气多元对流特性 [D]. 武汉: 武汉大学, 2017. REN Xiu-hong. Multi-component convection in the solar chimney and ventilated enclosure driven by thermal buoyancy [D]. Wuhan: Wuhan University, 2017.

[1]	何国青,吕达. 透明插板对太阳能烟囱通风的增强效应[J]. 浙江大学学报(工学版), 2021, 55(12): 2260-2266.
[2]	肖宝兰, 俞小莉,韩松,陆国栋,夏立峰. 翅片参数对车用中冷器流动传热性能的影响[J]. J4, 2010, 44(11): 2164-2168.
[3]	朱炜, 王竹, 田轶威, 等. 夏热冬冷地区民居夏季环境实测及构造分析——以湖州市为例[J]. J4, 2009, 43(8): 1526-1531.

Viewed

Full text

Abstract

Cited

Shared

Discussed