NEWS

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May
27
2014

Cooling buildings in a tropical country like ours

Now that we "know and understand” the climate conditions in our country from our last issue, we have even better knowledge and understanding that are climate is almost never "comfortable”. So, if this is the way it’s got to be, are there any guidelines for making the buildings where we work and live more comfortable?Are air conditioners only our option for staying cool? Before all else, we need to know..How do our buildings get so hot?And where does the heat come from?

The heat occurring inside buildings
makes us feel uncomfortable. A factor is
the heat comes from weather, temperature and humidity in the air of the
buildings that are almost never \"comfortable” as we discussed in our last
issue. And this heat increases due to
accumulation in the floor, wall and glass materials serving as building
\"envelopes” to help protect us from sunlight and rain. Consequently, the heat accumulated in those
materials brings heat into the buildings.And this is what makes the inside of these buildings gain more heat than
the weather outside.


Extra heat is the main reason we need to
set our air conditioners at such low temperatures until it is cooler than
necessary. No matter how low we set the
temperatures, we feel no cooler because part of the coolness of the air
conditioner is used to cool down the materials.Another part is used to compensate for the warmth radiated from the
materials or the building envelops (Once the floor,
walls, roof and glass have higher temperatures than the outside weather, the
heat will radiate to Area with where has temperatures).


 


With
this understanding, we will use the following three key guidelines to make our
buildings cooler:


1.Environmental
Conditions and Building Envelopes


Building envelopes can be improved
with lower temperatures by reducing accumulated heat in the area surrounding
the buildings, so the building temperature is no higher than the weather
temperature and trying to keep the temperature low by many methods, such as using
a few concrete material to surround the building as low as possible in order to reduce heat absorption and accumulation then
planting grass and large trees with as much shade as possible, so the area
around the building is shady. Water is evaporated by several methods to lower
temperatures in the areas surrounding the building with, e.g. fountains, waterfalls
and other water sources. Therefore the breezes in the area around and through
the building are lower in temperature than the weather or what we call \"cool
breezes”.


 


2.Building Placement and
Shape


Our buildings will have maximum
shade from the sunlight by shaping them with as little as exposure of wall, roof and glass surface to sunlight. Then
turning the buildings face away from the sunlight, e.g. designing
the western and eastern walls with as little surface area as possible,
particularly on the western side which is the side most affected by the
sunlight, and designing wall area with
as many as possible open windows on the north and south sides. This is because
the north and south are the sides least affected by sunlight. Breezes are usually found on the south side,
which can help to feel cooler. In
particular, when the wind blows from a conditioned environment, this will make more comfortable and cooler.


Figure 2 shows
the planning concepts for the Magnolia 1 project where each home is placed so
it can be shaded from the sun by other homes to the east
and west and opened front of houses face to the north and south, which are the orientation
with the least sunlight with breezes blow.The areas surrounding the homes are planted with trees and grass.


Figure 3 shows the building
placement in the Whizdom, the Exclusive condominium project with the narrow
sides facing the east and west, while windows are opened to let the breezes through to the south, where
the wind is needed to bring for making morecomfortable during the hottest months of the year.



3. Building Envelop
Design and Materials


The building envelop is composed of
the walls, roof and glass, which are key components to have our homes either
hot or cool. Selecting good materials
means choosing materials that do not absorb heat or humidity, but having the
quality of good heat protection enables them to reduce heat accumulation in the
materials, while decreasing heat ventilation from outside to inside the
building and lowering the density of mold and mildew-causing water droplets for
the comfort and health of everyone in the house.


With these three concepts, we can make
our buildings cooler. Our next issue
will discuss each part in detail so our readers can learn DIY
style.



Share Information: Research & Development Department


D I Designs Co., Ltd

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