cooling the terrace - heat transfer film
For more than one reason, summer in India is a hot topic.
This may be the same as the British often talk about their rainfall.
Imagine the book "summer in India"
Lutyens, Baker and Imperial Delhi' have nothing to do with India's climate data, a story written by Robert Grant Irwin about how New Delhi is planned and manufactured.
Another book with the same title "Indian Summer" is Alex von tozeman's secret history of the end of the Empire, which is far more distant from the idea of a season.
Even James Ivory's film, heat and dust, tries to mention our summer, even if it's metaphorical.
Summer is a hot topic in town.
Today, India's summer is making headlines for more direct climate reasons --
The highest temperature in about 10 years is set a new record every year.
There is very little discussion about how these of us and our consumption patterns have created this record, but soaring temperatures have always caused heated debate.
Air-conditioning sales are also soaring. The contradiction is that the outdoor temperature is further rising.
It seems that the temperature has exceeded the limit of passive cooling, and we have given up hope for simple measures.
Part is OK, but in many cities such as Bangladesh, there is only a few weeks of extreme conditions in the year, and there is actually no need to change to air conditioning.
Covering the roof in the hot summer can reduce the indoor temperature to an affordable level, if not as low as AC can achieve.
Direct solar radiation can be obtained from the terrace, so it has a high solar thermal gain, which is transmitted to the inner surface by conduction.
Imagine that we are trying to color the surface with a wooden pallet, which is a frame of board with gaps in the middle for packaging, especially in other places such as boats.
Google search can show a lot of pictures.
Once the packaging is opened, these are discarded for sale on the second market.
There is no heat transfer on the terrace, they allow direct light between the gaps in a short period of time, which does not allow the surface to get too much heat.
Of course, the air under the particles will be heated, but the hot air will enter the cooler air from the outside of the particles, so there is very little heat transmitted through convection.
These particles are usually made abroad with pine trees and this type of wood, and can withstand sunlight and rain for a long time if handled properly.
The gap between them can be kept fairly narrow;
So anyone can walk through them without any discomfort.
If there are any unexpected summer showers, the rain will be drained without hindrance.
After the end of the hot summer, the particles can be stored safely for reuse in the next season.
The theory behind this idea is rooted in a term that sounds great "ventilation cavity roof", but can be implemented within a very small budget. (
The author is an architect who works for eco.
Friendly design, can contact at varanashi @ gmail. com)