Do aluminium awning windows provide enough natural light

2013

Exterior window shades are considered an effective option for passive energy efficient design in hot dry climates such as Los Angeles. Many types are used on the USC campus including block shading plus side fins, overhangs plus side fins, and louvers plus overhangs. These three were modeled and then simulations were run in DesignBuilder. They were evaluated for their comparative effectiveness in reducing annual energy consumption compared with a base case. Because the “louvers plus overhang” performance exceeded the other two strategies, it was disassembled into its two separate components in order to gauge the impact of these individual elements. Each of the strategies was then simulated for all four major orientations in order to evaluate their effectiveness under varying conditions. The results show that energy performance did vary based on shading strategies and their orientations. The results re-emphasize that the type of shading should be dependent on orientation.

International Journal of Engineering and Technology, 2016

The aim of this research is to quantify the daylight autonomy and the useful daylight illuminance produced inside a room for different models of windows, and to conduct an analysis of the results obtained. The shape, size and position of the window are variable, as is the reflectance of the inner surfaces of the room. A total of 28 simulations are provided by the lighting simulation program DaySim 3.2. After trials it was concluded that the daylight autonomy is directly proportional to the glass surface in the back of the room, while its influence in the zone near the faç ade is negligible. However, the energy saving does not depend on the window shape. It is also concluded that the windows in the upper position allow higher luminance at the back of the room than those in centered locations.

2003

Building and Environment, 2011

a b s t r a c t Solar shades are efficient architectural elements in order to reduce the thermal loads inside buildings. In one way, they can reduce significantly the energy needs of cooling systems. But in other way, they can decrease the visual comfort and increase the energy consumption of artificial lighting. Actually, the sizing of shading devices is mainly a thermal optimization process. The efficacy of solar shades must be assess taking into account both thermal and visual point of view.

Proceedings of IEECB'10, 2010

Daylighting in tropical and sub-tropical climates presents a unique challenge that is generally not well understood by designers. In a sub-tropical region such as Brisbane, Australia the majority of the year comprises of sunny clear skies with few overcast days and as a consequence windows can easily become sources of overheating and glare. The main strategy in dealing with this issue is extensive shading on windows. However, this in turn prevents daylight penetration into buildings often causing an interior to appear gloomy and dark even though there is more than sufficient daylight available. As a result electric lighting is the main source of light, even during the day.

Renewable Energy, 2015

The aim of this research is to quantify the daylight factors produced inside a room for different models of windows, and to conduct an analysis of the results obtained. All trials were performed under overcast sky conditions, as these represent the worst case scenario for calculation. The shape, size and position of the window are variable, as is the reflectance of the inner surfaces of the room. A total of 28 simulations are provided by the lighting simulation program Daylight Visualizer 2.6, validated by the CIE test cases. After trials it was concluded that square windows produce daylight factors slightly higher than those obtained with horizontal windows and noticeably higher than those measured with vertical windows, considering the same surface of openings. It is confirmed that the daylight factors are directly proportional to the glass surface, except in the area near the window. It is also concluded that the windows in the upper position allow higher luminance at the back of the room than those in centered locations. Finally, the energy savings produced by the different models of windows is calculated.

"Glazing materials have a significant impact on the energy efficiency of the building interior. Poorly designed skylights, windows and glazed surfaces can create an uncomfortable environment. The effect of heat gain through an un-shaded glass can be 100 times higher compared to the same area of an insulated wall. Currently, various alternative glazings with different performances are being used daily. There are many choices and alternatives to consider, and careful selection is significant to meet the design requirements. The optical features of glazing materials influence daylighting quality, the thermal characteristics and the potential of energy savings. The increasing interest of skylights as an effective strategy among building professionals and building owners implies that they are keen to know about the performance and energy efficiency of various glazing materials used on skylights. The aim of this study is to review the glazing performance and glazing types that are applied in the skylight roofing system. The review targets at two important factors in glazing performance, namely, solar light and solar heat. The review emphasises this general relationship during the design stage to ensure greater visibility in the product selection, also to ensure various other advantages improved comfort in perimeter zones, reduced mechanical loads and improved energy performance."

MATEC Web of Conferences, 2018

Glass is the major component of the building envelope to provide visual comfort to inside the buildings. In général clear and bronze glass was used as a main building envelope for both residential and commercial buildings to provide better day lighting into the buildings. If we use more glass area as a building envelope more radiation allows into the buildings. So that it is necessary to reduce more solar radiation and provide sufficient daylight factor inside the building's through glass windows with the help of external devices called shading devices. In this work four shading devices was tried on bronze glass window to find the heat gain and daylighting into buildings. This paper presents the experimental measurement of spectral characteristics of bronze glass which include transmission and reflection in entire solar spectrum region (300nm-2500nm) based on ASTM standards. A MATLAB code was developed to compute visible and solar optical properties as per the British standards. A building model was designed by design builder software tool. 40% window to wall ratio was considered for building models, thermal and day lighting analysis of buildings through windows was carried out in Energy plus software tool for hot and dry climatic zone of India.

The world today is faced with climate change issues and due to the activities man has been involved in over the years. World leaders have become very concerned with this and lot of measures are been laid down to mitigate this. The built environment is a major contributor since its construction process, materials used and even the daily operation uses a lot energy which is a major concern. Architects are therefore challenged with creating a balance between their traditional aesthetics of buildings and energy efficiency. This research therefore seeks to find out how this balance can be achieved in the tropics through the use of different window pane properties. The study therefore sought to identify developments of windows with regards to their pane properties to see how both aesthetics and energy efficiency can be achieved. Literature was reviewed to find out the current situation and then a case study building analysed for results. The case study buildings were then modified to see the effect of each modification. Comparative analysis was done with the original buildings and the modified buildings and it was found that reflection was a key to achieve both aesthetics and energy efficiency. Other factors had impact and influence on the aesthetics and energy efficiency but reflection stood out of the lot.