scholarly journals Ventilation Rate and Thermal Environment Properties of Double Skin Façade Considering Wind Profile and Direction

2017 ◽  
Vol 16 (3) ◽  
pp. 675-682
Author(s):  
Geum-Hee Kim ◽  
Hyuk-Min Kwon ◽  
Jeong-Hoon Yang
Keyword(s):  
Wind Profile ◽  
Thermal Environment ◽  
Ventilation Rate ◽  
Double Skin

Numerical Simulation of Indoor Thermal Environment of a Double-Skin Facade Office with Different Shutter Angles

2014 ◽  
Vol 694 ◽  
pp. 256-259
Author(s):  
Xin Zhan ◽  
Hua Yang ◽  
Feng Yun Jin
Keyword(s):  
Heat Transfer ◽  
Thermal Environment ◽  
Ventilation Rate ◽  
Air Distribution ◽  
Indoor Thermal Environment ◽  
Double Skin ◽  
Computational Fluid Dynamics Cfd ◽  
Heat Transfer Simulation ◽  
Shading Devices ◽  
Rng Turbulence Model

Airflow and heat transfer simulation was conducted for a double-skin façade (DSF) system equipped with shading devices in the cavity, using computational fluid dynamics (CFD) with RNG turbulence model and PISO algorithm, for five conditions of slat angles (θ=0°, 30°, 45°, 60°, 90°). The present study indicates that the presence of shading devices influences the temperatures, the ventilation rate and the air distribution in the DSF system. Besides, the different angles will make different influences.

Reducing Roof Solar Heat Gain by Using Double-Skin Ventilated Roofs

2020 ◽  
Vol 38 (3A) ◽  
pp. 402-411
Author(s):  
Mohannad R. Ghanim ◽  
Sabah T. Ahmed
Keyword(s):  
Inclination Angle ◽  
Convection Heat Transfer ◽  
Ventilation Rate ◽  
Channel Length ◽  
Air Gap ◽  
Galvanized Steel ◽  
Heat Gain ◽  
Solar Heat ◽  
Double Skin ◽  
Solar Heat Gain

Double skin ventilated roof is one of the important passive cooling techniques to reduce solar heat gain through roofs. In this research, an experimental study was performed to investigate the thermal behaviour of a double skin roof model. The model was made of two parallel galvanized steel plates. Galvanized steel has been used in the roof construction of industrial buildings and storehouses in Iraq. The effect of inclination angle (ϴ) from the horizontal and the spacing (S) between the plates was investigated at different radiation intensities. It is found that using a double skin roof arrangement with a sufficient air gap (S) can reduce the heat gain significantly. The higher the inclination angle (ϴ) the higher the ventilation rate, the lower the heat gain through the roof. In this study, increasing the air gap from 2 cm to 4 cm reduced the heat gain significantly but when the gap was further increased to 6 cm, the reduction in the heat flux was insignificant. A dimensionless correlation was also reduced between Nusselt number () and the single parameter  where L is the channel length. This correlation can be handily utilized for designing of engineering applications dealing with high temperature difference natural convection heat transfer.

scholarly journals Thermal Environment Dynamic Simulation of Double Skin Façade with Middle Shading Device in Summer

2016 ◽  
Vol 146 ◽  
pp. 251-256
Author(s):  
Hua Yang ◽  
Ying Zhou ◽  
Feng-yun Jin ◽  
Xing Zhan
Keyword(s):  
Dynamic Simulation ◽  
Thermal Environment ◽  
Double Skin ◽  
Shading Device

A Review of Research Development of Ventilated Double-Skin Facade

2014 ◽  
Vol 587-589 ◽  
pp. 709-713
Author(s):  
Xin Feng ◽  
Hua Yang ◽  
Xi Yang Feng ◽  
Feng Yun Jin ◽  
Guo Qiang Xia
Keyword(s):  
Heat Transfer ◽  
Temperature Distribution ◽  
Solar Radiation ◽  
Building Energy ◽  
Ventilation Rate ◽  
Channel Width ◽  
Visual Comfort ◽  
Research Development ◽  
Building Energy Conservation ◽  
Double Skin

Demands for the building energy conservation, thermal and visual comfort make the ventilated double-skin facade (DSF) more attractive and more popular in commercial buildings. This paper reviews the recent research development of ventilated double-skin facade in China. The velocity and temperature distribution in the double-skin facade (DSF) are reviewed, together with the effects of glass types, channel width, intensity of solar radiation and shading methods on the heat transfer of ventilated double-skin facade (DSF). This paper also describes the effect of the different combinations of glass, blinds settings, ventilation rate and the channel width, intensity of solar radiation and shading. Furthermore, the methods to improve the energy saving of ventilated double-skin facade (DSF) are also reviewed.

scholarly journals Factors Affecting Trailer Thermal Environment Experienced by Market Pigs Transported in the US

Animals ◽  
2018 ◽  
Vol 8 (11) ◽  
pp. 203
Author(s):  
Yijie Xiong ◽  
Richard Gates ◽  
Angela Green-Miller
Keyword(s):  
Quality Assurance ◽  
Spatial Distribution ◽  
Temperature Rise ◽  
Thermal Environment ◽  
Management Strategies ◽  
Weather Conditions ◽  
Ventilation Rate ◽  
Factors Affecting ◽  
The Us ◽  
Ventilation Pattern

Extreme weather conditions challenge pig thermoregulation during transport and are addressed by the National Pork Board (NPB) Transport Quality Assurance® (TQA) program that provides guidelines for trailer boarding, bedding, and misting. These guidelines are widely applied, yet very little is known about the microenvironment within the trailer. In this study, TQA guidelines (V4) were evaluated via extensive thermal environment measurements during transport in order to evaluate spatial variability and implications on ventilation pattern. Effects of trailer management strategies including bedding, boarding, and misting were examined and the trailer was monitored for interior temperature rise and THI responses within six separate zones. The trailer thermal environment was not uniformly distributed in the colder trips with the top front and bottom zones were the warmest, indicating these zones had the majority of outlet openings and experienced air with accumulated sensible and latent heat of the pigs. Relatively enhanced thermal environment uniformity was observed during hot trips, suggesting that ventilation patterns and ventilation rate were different for colder vs. warmer weather conditions. Misting applied prior to transport cooled interior air temperature, but also created high THI conditions in some cases. Neither boarding and bedding combinations in the TQA nor boarding position showed impacts on trailer interior temperature rise or spatial distribution of temperature inside the trailer.

Simulation and Analysis of Thermal Performance of Internal Recycle Double Skin Facades

2014 ◽  
Vol 580-583 ◽  
pp. 2415-2420 ◽  
Author(s):  
Cun Hui ◽  
Yuan Qing Wang ◽  
Bin Wang ◽  
Wei Tao ◽  
Sheng Lin Zheng
Keyword(s):  
Heat Transfer ◽  
Heat Transfer Coefficient ◽  
Transfer Coefficient ◽  
Ventilation Rate ◽  
Heat Transfer Process ◽  
Comfort Level ◽  
Curtain Wall ◽  
Double Skin ◽  
Computational Fluid Dynamics Cfd ◽  
Double Skin Facades

Simulation and analysis of heat transfer process in internal recycle double skin facades (DSF) of the established standard model were carried out by computational fluid dynamics (CFD). Comprehensive heat transfer coefficient under the condition of different ventilation rate of DSF with and without blinds was studied. The results show: the increase of the ventilation rate can not only improve the comprehensive heat transfer coefficient, but also improve the temperature of inner surface of the inner curtain wall. Double skin facades can improve the comfort level of the indoor environment, reduce the energy loss of the palisade structure and reduce energy consumption.

Optimal Design of the External Respiration Double Skin Facade

2011 ◽  
Vol 374-377 ◽  
pp. 257-262
Author(s):  
Shi Feng ◽  
Wang Wei
Keyword(s):  
Optimal Design ◽  
Natural Ventilation ◽  
Thermal Environment ◽  
External Respiration ◽  
Indoor Temperature ◽  
Temperature Changes ◽  
Indoor Thermal Environment ◽  
Double Skin ◽  
Computational Fluid Dynamics Cfd ◽  
Cfd Method

An optimal design is taken on the external respiration double skin facade (DSF) of a office building in Wuhan. The indoor thermal environment of the office units in the building have been simulated by taken computational fluid dynamics (CFD) method, and then the paper analyzes the indoor temperature changes under the condition that the internal airflow status of the DSF for natural ventilation, without shade, vents closed and other cases, discusses the influences of different inner glazed skin’s thermal properties, DSF for active ventilation and different wind speed on indoor thermal environment, according to the simulation results we obtain parameters of relevant optimal design.

Sign in / Sign up

Export Citation Format

Share Document