passive solar building

8/6/2019 Passive Solar Building

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PASSIVE

SOLAR

BUILDING

Rohit Chaurasia

71/08


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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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passive solar building

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