LITERATURE CASE STUDY ON:

1. BIDANI HOUSE, FARIDABAD2.PEDA BUILDING, CHANDIGARH

NOKKHA WANGSASAMUEL D.TANDIN D.

INTRODUCTION AUR CONCLUSIONBANAU DE..HUM SOYEGAGUD NYTSUBHA UTHEGA BOLNE SE UTHA DENA

The Bidani house is a project that demonstrates a situation where a climate responsive form and design was achieved in an existing urban situation with a fixed site size and orientation. Faridabad, located in the ‘composite climate’ zone, has large climatic swings over the year, i.e. very hot and dry period of almost two and a half months and a colder period of a shorter duration. The hot dry period is followed by a hot humid, monsoon period of about two months with intervening periods of milder climate.

The site Located in Faridabad, near New Delhi, this house has been designed and built in the ‘composite climatic context’. The site of about 1000 m2 had a plan area in the ratio of 1:3 with the shorter side facing the road and oriented north 

Maximum exposure to south-east for living spaces and buffer spaces on south –west to eliminate heat gains during summer

Planning in response to climate The demand on building design was to respond to the extremes: eliminate(minimize) heat gain in hot dry period, maximize ventilation in hot humid period from zones/areas designed as heat sinks and maximize heat gain in the cold period. This has been achieved in this house entirely through the form and fabric of the building. A courtyard facing and opening onto north-cast has been designed as a heat sink. The entire house form has been developed around the courtyard with all the main living spaces wrapping around it and having maximum south-east orientation that is the ideal exposure for this context A large volume living space designed as a double height space is wrapped around the courtyard. Butler spaces Like the toilets and stores are located on the overheated south-western exposure to eliminate heat gain in summers.

Diurnal swings in temperature are attenuated by judicious design and placement of thermal mass, utilizing local stone as the major material of construction, The resultant building provides a comfortable environment with the temperatures humidity, and airflow levels remaining in the comfort zone during all seasons of the year.

Double-height living space for ventilation and day lighting.

• House form developed around courtyard (acts as heat Sink) • Large volumes of spaces coupled with courtyard for ventilation • Buffer spaces located on the overheated south- western exposure • Form of the building allows solar penetration according o seasonal changes • Pergola and louvers cut off unwanted radiation • Local stone used as major construction material, which provides thermal mass for attenuation of diurnal swings in temperature

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PEDA – Solar Passive Complex, Chandigarh is a unique and successful model of Energy Efficient Solar Building, designed on solar passive architecture with the partial financial support of Ministry of New & Renewable Energy, GOI and Dept. of Science, Technology, Environment and Non-conventional Energy, Govt. of Punjab

Design features • Floors Interconnected volumetrically to enable passive space conditioning of the entire volume of the building • Large cut-outs for light and ventilation wells• Building-integrated solar photovoltaic and solar water heating • Winter heating by direct solar gain through roof glazing and Summer cooling through wind tower • Thermal mass of floor slabs moderates diurnal swings

Water bodies with waterfalls and fountains have been placed in the central atrium of the complex for cooling of the whole complex in the hot and dry period.

The PEDA building is a series of overlapping floors at different levels in space floating in a large volume of air, with interpenetrating large vertical cut-outs. These vertical cut-outs are integrated with light wells and solar-activated naturally ventilating, domical structures. This system of floating slabs and the interpenetrating vertical cutouts is then enclosed within the envelope of the building. The envelope attenuates the outside ambient conditions and the large volume of air is naturally conditioned by controlling solar access in response to the climatic swings, i.e. eliminating it during hot-dry period and maximizing its penetration in cold period. The large volume of air is cooled during the hot period by a wind tower, integrated into the building design, and in the cold period this volume of air is heated by solar penetration through the roof glazing, generating a convective loop

While thermal performance of the building is a major parameter of design, adequate distribution of daylight within the entire working zone of the building is a major criterion for design. This has been achieved through the domical structures designed above the light wells, which are evenly distributed throughout the building.

Solar Power Plant: 25Kwp building integrated solar photovoltaic power plant has been set up to meet the basic requirement of electricity in the complex

Unique Shell Roofing on Central Atrium : The Central atrium of the complex having main entrance, reception, water bodies, cafeteria and sitting place for visitors constructed with hyperbolic shell roof to admit daylight without glare and heat coupled with defused lighting through glass to glass solar panels.  The roof is supported with very light weight space frame structure.

Landscape Horticulture: The space around the building, inside and outside of boundary wall and a big lawn in the south has been designed with trees, shrubs and grass.  The big trees along the boundary wall acts as a curtain to minimize air pollution, sound pollution and filter/cool the entry of air

Auditorium: A unique auditorium scientifically designed to control heat penetration, light & sound distribution is placed in the north under the shade of main building.

90% reduction in lighting consumption 50% saving in overall energy consumption Considerable reduction in recurring expenditure Clean and pollution free environment Considerable thermal comfort High Productivity