西安建筑科技大学学报(自然科学版)

模拟研究多层建筑太阳能烟囱全年热压通风效果并进行通风潜力评价. 基于设计平台搭载的性能模拟工具Honeybee和RhinoCFD构建耦合模拟工作流,计算太阳能驱动下烟囱逐时通风量; 根据房间最小新风量要求、通风时长等因素计算单位时间有效流量,并定义为烟囱的通风潜力值; 选取南京某办公建筑双入口太阳能烟囱进行了案例研究. 结果表明:该太阳能烟囱全年逐月通风潜力值呈现出“M”形波动,潜力值较大主要集中在4～6月和9～11月,其中10月份达到最大的637.7 m3/h; 烟囱通风存在流量分配失衡现象,一层入口流量满足房间新风量要求的时长远大于二层; 对比发现,独立式烟囱可实现更均衡的流量配置. 单位时间有效流量能够较好反映多层太阳能烟囱的通风潜力; 相关研究方法与结论可为设计阶段的烟囱性能评估与优化提供参考.

The present work aims at studying the annual stack ventilation of solar chimney in multi-storey buildings and evaluating the ventilation potential. A simulation workflow coupling Honeybee and RhinoCFD, performance simulation tools on design platform, is proposed to calculate the hourly ventilation rate of chimney driven by solar energy. Then the effective hourly ventilation rate, which is defined as the ventilation potential value, is determined according to the ventilation duration and the minimum fresh air requirement of each room. A case study of a double-inlet solar chimney in an office building in Nanjing was carried out. The results indicate that the monthly ventilation potential value of the solar chimney shows a "M" shape fluctuation. The value is higher mainly from April to June and September to November, and reaches the maximum, 637.7 m3/h, in October. The phenomenon of flow distribution imbalance exists in the chimney, and the duration of the first-floor inlet flow meeting the requirements of fresh air volume is longer than that of the second floor. The comparison shows that the independent chimney can achieve more balanced flow configuration. The effective hourly ventilation rate turns out to be a useful indicator for multi-story chimney's ventilation potential. The research method in this paper can provide reference for chimney performance evaluation and optimization in design stage.

引言
1 研究方法
2 案例研究
3 结论

图1 案例建筑模型<br/>Fig.1 Model of the case building

图1 案例建筑模型
Fig.1 Model of the case building

图2 网格及气流模拟结果<br/>Fig.2 Mesh and air flow simulation results

图2 网格及气流模拟结果
Fig.2 Mesh and air flow simulation results

表1 不同工况下烟囱入口1、2流量系数<br/>Tab.1 Flow distribution coefficients of inlet one and two of the chimney under different conditions

表1 不同工况下烟囱入口1、2流量系数
Tab.1 Flow distribution coefficients of inlet one and two of the chimney under different conditions

图3 功能房间新风流量<br/>Fig.3 Outdoor air flow rates of office rooms

图3 功能房间新风流量
Fig.3 Outdoor air flow rates of office rooms

图4 太阳能烟囱逐月通风潜力值<br/>Fig.4 Monthly ventilation potential values of the studied solar chimney

图4 太阳能烟囱逐月通风潜力值
Fig.4 Monthly ventilation potential values of the studied solar chimney

图5 功能房间新风流量<br/>Fig.5 Outdoor air flow rates of office rooms

图5 功能房间新风流量
Fig.5 Outdoor air flow rates of office rooms

图6 太阳能烟囱逐月通风潜力值<br/>Fig.6 Monthly ventilation potential values of the studied solar chimney

图6 太阳能烟囱逐月通风潜力值
Fig.6 Monthly ventilation potential values of the studied solar chimney

[1]张国强, 阳丽娜, 周军莉,等.自然通风潜力评估体系的建立与应用[J].湖南大学学报(自然科学版), 2006, 33(1):25-28.
[2]ZHAI X Q, SONG Z P, WANG R Z, A review for the applications of solar chimneys in buildings[J].Renewable and Sustainable Energy Reviews, 2011, 15(8): 3757-3767.
[3]查新彧, 秦孟昊.太阳能烟囱通风效果的实验研究与数值模拟[J].建筑科学, 2017, 33(4): 8-14.
[4]BANSAL N K, MATHUR R, BHANDARI M S.Solar chimney for enhanced stack ventilation[J].Building and Environment, 1993, 28(3): 373-377.
[5]ANDERSEN K T.Theoretical considerations on natural ventilation by thermal buoyancy[J].ASHRAE Transactions, 1995, 101(2): 1103-1117.
[6]ONG K S. A mathematical model of a solar chimney[J].Renewable Energy, 2003, 28(7): 1047-1060.
[7]MARTI-Herrero J, HERAS-Celemin M R. Dynamic physical model for a solar chimney[J].Solar Energy, 2007, 81(5): 614-622.
[8]GODOY-Vaca L, MANUEL A, KASTILLO J, et al. Dynamic-physical model to predict the performance of a solar chimney in a warm-humid climate with different absorbent materials[C]//Proceedings, 15th International Conference of the International Building Performance Simulation Association(Building Simulation 2017). USA, San Francisco:2017: 294-303.
[9]雷先鹏. 太阳能烟囱强化自然通风在多层建筑中的应用研究[D].长沙: 中南大学, 2011.
[10]赵爽. 绿色建筑太阳能烟囱强化通风设计及室内热环境模拟[D].天津: 天津大学, 2018.
[11]ASADI S, FAKHARI M, FAYAZ, R.et al. The effect of solar chimney layout on ventilation rate in buildings[J]. Energy and Buildings, 2016(123): 71-78.
[12]查新彧. 太阳能烟囱的通风效果与节能效果研究[D].南京: 南京大学, 2017.
[13]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.
[14]GERMANO M, ROULET C A. Multicriteria assessment of natural ventilation potential[J]. Solar Energy, 2006, 80(4): 393-401.
[15]LUO Z, ZHAO J, GAO J, et al. Estimating natural-ventilation potential considering both thermal comfort and IAQ issues[J]. Building and Environment, 2007, 42(6): 2289-2298.
[16]Ladybug Tools LLC. What is Honeybee?[EB/OL].(2020-09-08)[2020-09-08].https://www.ladybug.tools/honeybee.html/.
[17]CHAM. RhinoCFD, CFD plugin for Rhino3D[EB/OL].(2020-09-08)[2020-09-08].http://rhinocfd.com/rhinoCFD.php/.
[18]MEKKAWI G, ELGENDY R A. Solar chimney for enhanced natural ventilation based on CFD-simulation for a housing prototype in alexandria, Egypt[J].International Journal of Advances in Mechanical and Civil Engineering, 2016, 3(5): 5-10.

备注

引言

1 研究方法

2 案例研究

3 结论

期刊信息