Shabestan
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A shabestan or shabistan (; is an underground space that can be usually found in traditional architecture of mosques, houses, and schools in ancient
Iran Iran, officially the Islamic Republic of Iran (IRI) and also known as Persia, is a country in West Asia. It borders Iraq to the west, Turkey, Azerbaijan, and Armenia to the northwest, the Caspian Sea to the north, Turkmenistan to the nort ...
. These spaces were usually used during summers and could be ventilated by
windcatcher A windcatcher, wind tower, or wind scoop () is a traditional architectural element used to create cross ventilation and passive cooling in buildings. Windcatchers come in various designs, depending on whether local prevailing winds are unidi ...
s and
qanat A qanāt () or kārīz () is a water supply system that was developed in ancient Iran for the purpose of transporting usable water to the surface from an aquifer or a well through an underground aqueduct. Originating approximately 3,000 years ...
s. During the
Sasanian Empire The Sasanian Empire (), officially Eranshahr ( , "Empire of the Iranian peoples, Iranians"), was an List of monarchs of Iran, Iranian empire that was founded and ruled by the House of Sasan from 224 to 651. Enduring for over four centuries, th ...
and the subsequent Islamic periods, ''shabestan'' also referred to inner sanctums of the
shah Shāh (; ) is a royal title meaning "king" in the Persian language.Yarshater, Ehsa, ''Iranian Studies'', vol. XXII, no. 1 (1989) Though chiefly associated with the monarchs of Iran, it was also used to refer to the leaders of numerous Per ...
s where their
concubines Concubinage is an interpersonal and sexual relationship between two people in which the couple does not want to, or cannot, enter into a full marriage. Concubinage and marriage are often regarded as similar, but mutually exclusive. During the e ...
resided. Later these structures came to be called '' zanāneh'' "women's residence" and '' andaruni'' "inner private zone".


Cooling

A shabestan can be cooled using a
qanat A qanāt () or kārīz () is a water supply system that was developed in ancient Iran for the purpose of transporting usable water to the surface from an aquifer or a well through an underground aqueduct. Originating approximately 3,000 years ...
in conjunction with a
windcatcher A windcatcher, wind tower, or wind scoop () is a traditional architectural element used to create cross ventilation and passive cooling in buildings. Windcatchers come in various designs, depending on whether local prevailing winds are unidi ...
. A windcatcher is a chimney-like structure positioned above the house; the one of its four openings opposite the wind direction is opened to move air out of the house. Incoming air is pulled from a qanat below the house. The air flow across the vertical shaft opening creates a lower pressure (see Bernoulli effect) and pulls cool air up from the qanat tunnel below the house. The air from the qanat was drawn into the tunnel at some distance away and is cooled both by contact with the cool tunnel walls/water and by the giving up of
latent heat Latent heat (also known as latent energy or heat of transformation) is energy released or absorbed, by a body or a thermodynamic system, during a constant-temperature process—usually a first-order phase transition, like melting or condensation. ...
of evaporation as water evaporates into the air stream. In dry desert climates this can result in a greater than 15 °C (27 °F) reduction in the air temperature coming from the qanat. Windcatchers and qanat cooling have been used in desert climates for over 1000 years.


See also

*
Iranian architecture Iranian architecture or Persian architecture (, ''Me'māri e Irāni'') is the architecture of Iran and parts of the rest of West Asia, the Caucasus and Central Asia. Its history dates back to at least 5,000 BC with characteristic examples distr ...


Footnotes

Iranian architectural elements Islamic architectural elements Iranian inventions Passive cooling {{Islam-stub