In building design the concept of climate and the lighting play important role. Is there any co relation between them? Is the things simpler or complex? Can any one explain this nexus?
This is a question related to Green buildings - energy efficient buildings.
Types of climate could be classified as hot dry climate, warm humid climate and composite climate
in hot dry climate there is a strong direct sun light from the skies which are cloudless. Hot dry climate has its own problem. The clear sky has maximum luminescence near the horizon and the least at the right angle to the sun.Other building will therefore reflect much more light. The clear sky sometimes give rise to glaring or create haze with light dust suspensions.
In warm humid climate the sky is overcast. There are chances of getting diffused light in the building or sky light may be excessive causing glare which leads to dis -comfort and irritation.
In composite climates wide variations are possible in natural lighting.If I have understood correctly this is the answer probably you are looking for, Madam
This is a question related to Green buildings - energy efficient buildings.
Types of climate could be classified as hot dry climate, warm humid climate and composite climate
in hot dry climate there is a strong direct sun light from the skies which are cloudless. Hot dry climate has its own problem. The clear sky has maximum luminescence near the horizon and the least at the right angle to the sun.Other building will therefore reflect much more light. The clear sky sometimes give rise to glaring or create haze with light dust suspensions.
In warm humid climate the sky is overcast. There are chances of getting diffused light in the building or sky light may be excessive causing glare which leads to dis -comfort and irritation.
In composite climates wide variations are possible in natural lighting.If I have understood correctly this is the answer probably you are looking for, Madam
Thanks for your response.
Dr Sheth then what can be done to resolve the issue? Do you have any solution to avoid glare? may be louvers or grills?
The urban environment changes in localized climate where the way the buildings are distributed and their orientation towards the sun and their formation in space influences the creation of a localized climate for each location. In addition to the effect of construction materials and appearance of exterior and colors exposed surfaces and the way of design of open spaces such as streets, parks and squares and the interaction between construction and natural climate of the natural factors that affect the impact of human comfort: heat, humidity, light and wind
There is no doubt that some distributions create better climates than others and each region has a better spatial shape that every designer should discover and use as a standard reference for making appropriate design decisions.
Fundamental - Sun Light changes temperature , so does the lamps we use (flip side it consumes too) .
Yes Mittal Mam
Direct sun light needs to be excluded from the buildings by its proper design.
Windows in hot dry climate - sufficient sky will not be visible from any point (low luminescence blue sky) will give rise to glare. Similarly near the horizon luminescence is greater which may also cause glare.
So screening is the solution or high level window is good option (day lighting through internally reflected light)
Day lighting in a tropical climate is possibly using louvers or grills over the windows. This will help reducing excessive bright light causing glare or by appropriate (preferably white) painting of adjacent wall and inside of window frame etc.
Hi.
Light and climate can be seen as external conditions of buildings. From this perspective, to make it simple, light is part of the factors comprising our understanding of climate. A typical weather station will monitor radiation. If you multiply that with the luminous efficacy, which is a function of the spectral composition of incoming irradiation, you have light. What makes it complicated, and different from other aspects such as temperature or humidity, is the high frequency of temporal and spatial changes. So it makes a big difference if you have an average of, say, 20,000 lux on a horizontal plane constantly and equally coming from any sky region, or wether you have complete darkness and two hours of bright exposure to direct sun-light. Here it is worth to note that neither overcast nor clear sky exists. And three or four clouds on an otherwise sky result in a very different sky luminance distribution than if you would average their effect over the entire sky-dome.
You may find more information in literature about solar irradiation modeling. The "Perez all weather sky" model is e.g. an attempt to reconstruct the radiance (or luminance) distribution over the sky dome by only two parameters of irradiation, which are commonly found in weather data.
Of course, you can also regard light, and climate, as indoor conditions. Here there are interrelations between light admission by fenestration and light emission by artificial sources on the one, and e.g. thermal comfort on the other hand. As soon as light hits a surface, parts of it will become heat, and since artificial lighting performs below 100% efficacy, there will be additional loads due to heat supplied by ballasts, lamps etc. You will also find studies about effects of light exposure on perception of thermal comfort.
It may be good to further specify what aspect you are interested in. The field is broad, and a lot of research is going on in its different aspects.
Regards, Lars.
Thanks Dr Sheth , Issam Issa Omran and other colleagues for your answers. Enjoyed the session
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