CourtyardAs thermal regulator

Vaishali RajurkarBA07ARC012

Gayatri SaojiBA07ARC014

Principle of the courtyard

• High walls cut off the sun and larger areas of the inner surfaces and courtyard floor are shaded during the day.

• Due to the incident solar radiation in the courtyard, the air in the courtyard becomeswarmer and rises up. To replace it, cool air from the ground level flows through theopenings of the room, thus producing the air flow.

• During the night, the process is reversed. The cooled surface air of the roof sinks down to the court and this cooled air enters the living spaces through the low level openings and leaves through higher level openings.

• This system can work effectively in hot and dry climates, where day time ventilation isundesirable, as it brings heat inside and at night the air temperature becomes coolerand it can ventilate the building.

HOT AND DRY

WARM AND HUMID

A typical Kerala vernacular residential building

Legend : 1. entrance; 2. semi open space; 3. courtyard; 4. rooms; 5. kitchen;6. dining; and 7. religious rites

designed to deal with high temperature, excess of moisture in the atmosphere, intense solar radiation and heavy rainfall.

The presence of internal courtyard within the living spaces and optimum window openings provided for a continuous air movement, highly insulative building envelop for thermal protection, provision of verandahs for protection of external walls from solar radiation and the pitched roof for protection from heavy rain together contributefor a passive environment control system.

Takthabush

• In addition, in order to ensure a steady flow of air by convection, theconcept of takhtabush was introduced especially in North African countries like Egypt.• The takhtabush is a type of loggia. • It is a covered outdoor sitting area atground level that separates the courtyard from the back garden. • This disposition creates another case of ventilation by convection. • Since the back garden is typically less shaded than the courtyard, hot air rises from the floor and draws the cool air out from the courtyard through the takhtabush. • This creates a cool draft between the two spaces.

Thank You