Download - Passive Solar Building
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PASSIVE
SOLAR
BUILDING
Rohit Chaurasia
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WHAT IS
PASSIVE SOLAR BUILDING?
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PASSIVE SOLAR BUILDING RULES OF
THUMB
The building should be elongated on an east-west axis.
The buildings south face should receive sunlightbetween the hours of 9:00 A.M. and 3:00 P.M. (suntime) during the heating season.
Interior spaces requiring the most light , heating andcooling should be along the south face of the building.Less used spaces should be located on the north.
An open floor plan optimizes passive system operation.
Use shading to prevent summer sun entering theinterior. Sustainable by design has an online calculatorfor Sun Angles and from that you can figure theoverhang calculations.
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SOLAR BUILDING
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Direct heat gain in winter
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PRIMARY ELEMENTS OF PASSIVE SOLAR
HEATING
DIRECT GAIN:
SPACE IS USED AS SOLAR COLLECTOR AND
DISTRIBUTER SOUTHFACING GLASS
THERMAL MASS FLOORS ANDWALLS ARE THE
FUNCTIONAL PARTS IN DAY TIME THEY ABSORB SUNLIGHT AND
RADIATES IN NIGHT
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INDIRECT GAIN
Thermal mass located between sun and living space
THERMAL STORAGEWALL SYSTEM: Thermal mass located immediately behind the glass
ROOF POND SYSTEM: 6 to 12 inches of water layer
Best for low humid areas but in high humid areas it can bemodified
INTERIORW
ATERW
ALLS: Water has good convective properties
Widely fluctuating temperature is not often a problem wheninterior water walls are used as heat storage
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Thermal Mass Wall or Trombe Wall
Day and Night Operation
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ISOLATED GAIN
This part is seperated from living areas
Utilize 15 to 20 % of sun light
Isolated gain is combination of direct and indirectgain
Heating is done by convection process though air
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Sunroom function in summer
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PASSIVE SOLAR COOLING
uses in removing the unwanted heat from building
Primary strategy for cooling building, without any mechanical
or electrical source
VENTILATION AND OPERABLEWINDOWS:
Employ natural ventilation
Place operable windows on the south exposure If a room can
have windows on only one side, use two widely spaced
windows instead of one window.
Place operable windows on south exposure
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Wing wall
Panel placed along side the window
perpendicular to the wall
Wing wall will accelerate natural wind speed
View ofWingWalls Airflow Pattern
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Thermal chimney
Uses to draw hot air out of building
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OTHER VENTILATION STRATEGY
Make the outlet openings slightly larger than
the inlet openings.
Place the inlets at low to medium heights toprovide airflow at occupant levels in the room
SHADING:
It is done in south direction
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Thermal Chimney Effect Built into
Home
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PASSIVE SOLARWATER HEATING
Heated water can be used for domestic
purpose
It involves no pump or electrical device In swimming pools
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COST AND ECONOMICS
Same or slightly more than conventional
building
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CONCLUSIONS
Passive solar building is eco friendly as well as
it cost is almost same as conventional
building
It is less costly in lighting purpose
Beneficial for health
So people should be encouraged for the use ofpassive solar buildings.
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