Post on 02-Jun-2018
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SOLAR PASSIVE TECHNIQUESName :- Deepali BafnaRoll No.:- 2012BARX1005
School Of Planning And Architecture
Submitted To :- AR. MANISH SIR
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WHAT DO I MEAN BY SOLAR
PASSIVE TECHNIQUES ??
In passive solar building design,
windows, walls, and floors are made to
collect, store, and distribute solar energy
in the form of heat in the winter and reject
solar heat in the summer.
The key to designing a passive solar
building is to best take advantage of thelocal climate.
http://en.wikipedia.org/wiki/Solar_energyhttp://en.wikipedia.org/wiki/Climatehttp://en.wikipedia.org/wiki/Climatehttp://en.wikipedia.org/wiki/Solar_energy8/10/2019 Solar Passive Techniques
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ELEMENTS INCLUDED
Window placement
and glazing type
Thermal insulation
Thermal mass
Shading
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ACTIVE AND PASSIVE SOLAR SYSTEMS ARE USED IN THESOLAR UMBRELLA HOUSE TO ACHIEVE NEARLY 100% ENERGYNEUTRALITY .
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TYPES
TROMBE WALL
CAVITY WALL
WATER WALL SOLAR CHIMNEY
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TROMBE WALL
A wall is built on the winter sun side of a
building with a glass external layer and a high
mass internal layer separated by a layer of
air. Trombe walls work on the basic greenhouse
principle that heat from the sun in the form of
near-visible shorter-wavelength higher-energy ultraviolet radiation passes through
glass largely unimpeded.
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http://en.wikipedia.org/wiki/File:Trombe_wall.jpg8/10/2019 Solar Passive Techniques
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1)Air flow in trombe wall
2) A northern hemisphere
trombe wall
http://en.wikipedia.org/wiki/File:Rammed_earth.jpghttp://en.wikipedia.org/wiki/File:Trombe_Wall_flow.png8/10/2019 Solar Passive Techniques
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CAVITY WALL
Cavity wallsconsist of two 'skins' separated
by a hollow space (cavity).
.The skins are commonly masonry such as
brick or concrete block. Masonry is anabsorbent material, and therefore will slowly
draw rainwater or even humidity into the wall.
. The cavity serves as a way to drain this waterback out through weep holes at the base of
the wall system or above windows.
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THE SCIENCE OF CAVITY
INSULATION
The reason cavity insulation keeps heat in
is that the polymer and air in the cavity are
good insulators. This is because the
distance between the particles in the air isgreater than in a solid. Other benefits of
cavity walls are their resistance to
moisture from the outer side to the innerwall and the increase of sound proofing.
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WATER WALL
Water wall passive solar buildings are
usually the most attractive type of passive
solar home. The key element for a passive
solar home is thermal mass and waterprovides this mass at a lower cost than
either concrete or phase change salts.
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REASONS WE SHOULD
USE WATER WALL They can be installed in new construction easily and economically
They are more effective than masonry for heating and cooling,particularly in areas with cool night temperatures.
They are more flexible than phase change storage because theywork for cooling as well as heating, and don't have a critical
working temperature They can be easily disguised to become practically invisible .
They can be smaller than an equivalent masonry wall, avoidingthe claustrophobic sensation of full masonry walls .
They are extremely comfortable because of the large radiant
surface exposed to the inside In many cases they can be retrofitted economically and easily.
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Solar chimney
A solar chimneyoften referred to as athermal chimneyis a way of improvingthe natural ventilationof buildingsby using
convectionof airheated by passive solarenergy.
A simple description of a solar chimney isthat of a vertical shaft utilizing solar energyto enhance the natural stack ventilationthrough a building.
http://en.wikipedia.org/wiki/Ventilation_(architecture)http://en.wikipedia.org/wiki/Buildinghttp://en.wikipedia.org/wiki/Convectionhttp://en.wikipedia.org/wiki/Airhttp://en.wikipedia.org/wiki/Passive_solarhttp://en.wikipedia.org/wiki/Energyhttp://en.wikipedia.org/wiki/Natural_ventilationhttp://en.wikipedia.org/wiki/Natural_ventilationhttp://en.wikipedia.org/wiki/Energyhttp://en.wikipedia.org/wiki/Passive_solarhttp://en.wikipedia.org/wiki/Airhttp://en.wikipedia.org/wiki/Convectionhttp://en.wikipedia.org/wiki/Buildinghttp://en.wikipedia.org/wiki/Ventilation_(architecture)8/10/2019 Solar Passive Techniques
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THE BASIC DESIGN
The solar collector area: This can be located in thetop part of the chimney or can include the entireshaft. The orientation, type of glazing, insulationand thermal properties of this element are crucial
for harnessing, retaining and utilizing solar gains The main ventilation shaft: The location, height,
cross section and the thermal properties of thisstructure are also very important.
The inlet and outlet air apertures: The sizes,location as well as aerodynamic aspects of theseelements are also significant
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http://en.wikipedia.org/wiki/File:Solarchimney.jpg8/10/2019 Solar Passive Techniques
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CAD(TAS) SOLAR
CHIMNEY MODEL
http://en.wikipedia.org/wiki/File:Solar_chimney_TAS_model.jpg8/10/2019 Solar Passive Techniques
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POSITIVE ASPECTS
Reduced reliance on wind and wind drivenventilation
Improved control of air flow though a building
Greater choice Improved ventilation rates on still,
hot days of air intake (i.e. leeward side of building)
Improved air quality and reduced noise levels inurban areas
Increased night time ventilation rates Allow ventilation of narrow, small spaces with
minimal exposure to external elements
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THANK YOU
-BY DEEPALI BAFNA