Study on evaluation method for cross-ventilation environment taken account of steady ventilation flow rates and thermal comfort

考虑稳定通风流量和热舒适性的交叉通风环境评价方法研究

• 批准号: 18360278
• 负责人: OHBA Masaaki
• 金额: $ 10.88万
• 依托单位: Tokyo Polytechnic University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 2006
• 资助国家: 日本
• 起止时间: 2006 至 2007
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-18360278/
• 关键词: Cross-ventilation; Thermal comfort; Skin temperature of human body; Local dynamic similarity model; Infrared animation; Thermal image analysis; Coupled model; Airflow charcteristics; サーマルマネキン; 放射カメラ; 熱画像; ネットワークモデル

The field experiments, wind tunnel experiments and image analysis have been carried out. The findings of the study can be summarized as follows.(1) The local dynamic similarity model can predict discharge coefficients, which vary with wind direction and opening position, if some requirements are met. Four types of wind tunnel experiments were carried out in this study to investigate how strictly these requirements have to be met when the model is applied to inflow openings. There are no substantial problems in applying the model when the direction or profile of the tangential flow is changed or when there is a wall near the opening.(2) The local dynamic similarity model was coupled with a COMIS network model. The prediction accuracy of ventilation flow rates was verified for one-zone and two-zone building models. The coupled model achieved better predictions of discharge coefficients and ventilation flow rates than the conventional orifice flow model.(3) The airflow characteristics out … More side and inside a cross-ventilated room were measured by ultrasonic anemometers in summer 2006. The major contributions to the energy spectra of cross-ventilation are revealed in the frequency range less than 0.1Hz and that the energy spectra of cross-ventilation contain some region of wave numbers with an exponential decay of k-5/3.(4) When the air velocity was more than 0.5m/s, various air velocity changes and airflow fluctuations in time and space made subjects feel more comfortable under cross-ventilation than under airflows from the air-conditioning system.(5) The influence of air velocity fluctuations on surface temperature fluctuations of thermal mannequin was visualized in the experimental room under cross ventilated cases and under air conditioned cases. An image processing method to transfer the infrared animations to power spectrum images was proposed in order to clarify the frequency of surface temperature fluctuations.(6) The influence of building coverage ratio on ventilation performance was small rather on roofs than on walls. A roof window was found to be a very effective tool for increasing ventilation flow rates especially in densely populated area. Less

在现场实验中，可以总结研究的结果。这些时间是将模型应用于流入的，当更改切线流或隔离壁附近的壁上时，没有实质性的问题。 COMIS网络模型。与croptice流量相比，通风流量的预测流量验证了一个区域和区域构建模型的预测，而轿车模型的预测与流量的预测更好。 - 通过2006年夏季的超声波动脉仪测量通风的房间。频率范围内的creal能量光谱小于0.1Hz，跨境的能量和跨境的能量？ 。在交叉的情况下，提出了传递频谱图像的通风案例和有条件的情况。 OL，以增加通风速度，尤其是在较密集的区域。

项目成果

Experimental Study on Discharge Coefficient of Outflow Opening for Predicting Cross-Ventilation Flow Rate

预测交叉通风流量的出流口流量系数实验研究

• 发表时间: 2007
• 期刊: Proceedings of Indoor Air Quality, Ventilation and Energy Conservation in Buildings(IAQVEC) 1
• 作者: Tomonobu Goto;M.Ohba;T.Kurabuchi;T.Endo;Y.Akamine;T.Nonaka
• 通讯作者: T.Nonaka

A study on evaluation on cross-ventilation performance of openings Part 24 Experimental study on discharge coefficient of outflow opening

孔口交叉通风性能评价研究 第24部分 出水口流量系数试验研究

• 发表时间: 2007
• 作者: T. Goto;et. al.
• 通讯作者: et. al.

通風時と空調時における人体皮膚表面温度変動のパワースペクトルに関する熱画像解析 その1 クラスタ分類による周波数領域別パワースペクトル特性

通风空调过程中人体皮肤表面温度波动功率谱的热图像分析第1部分使用聚类分类的频域功率谱特征

• 发表时间: 2007
• 作者: 飯野 秋成;他4名
• 通讯作者: 他4名

Thermal image analysis of power spectrum of skin temperature change of human body under cross ventilation and air condition Part 2 Relations between power spectrum of skin temperature and wind Velocity

交叉通风空调条件下人体皮肤温度变化功率谱的热图像分析第2部分皮肤温度功率谱与风速的关系

• 发表时间: 2007
• 作者: T. Annaka;et. al.
• 通讯作者: et. al.

Study on proper design method of locating windows aiming at utilization of cross-ventilation in densely populated urban area

人口稠密城区利用交叉通风的合理开窗设计方法研究

• 发表时间: 2007
• 作者: T. Nonaka;et. al.
• 通讯作者: et. al.