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They are called zeer, hence the name of the pot cooler. Despite being developed in Northern Africa, the technology appeared to have been forgotten since the advent of modern electrical refrigerators. However, in the Indian subcontinent, ghara, matka and surahi, all of which are different types of clay water pots, are in everyday use to cool ...
The percentage of free cooling achieved mid-season is dependent on seasonal temperatures although partial free cooling commences when the ambient air temperature is 1 °C below the process return water temperature. The water is partially cooled through the free cooler, then flows through the chillers to achieve the required set point temperature.
Passive cooling covers all natural processes and techniques of heat dissipation and modulation without the use of energy. [1] Some authors consider that minor and simple mechanical systems (e.g. pumps and economizers) can be integrated in passive cooling techniques, as long they are used to enhance the effectiveness of the natural cooling process. [7]
An evaporative cooler (also known as evaporative air conditioner, swamp cooler, swamp box, desert cooler and wet air cooler) is a device that cools air through the evaporation of water. Evaporative cooling differs from other air conditioning systems, which use vapor-compression or absorption refrigeration cycles.
Evaporative cooling chambers (ECCs), also known as "zero energy cool chambers" (ZECCs), are a type of evaporative cooler, which are simple and inexpensive ways to keep vegetables fresh without the use of electricity. Evaporation of water from a surface removes heat, creating a cooling effect, which can improve vegetable storage shelf life.
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A matki or matka (Hindi and Urdu: maṭkī, maṭkā) in South Asia is an earthen pot used as a home "water storage cooler". It has been in use since ancient times and can be found in houses of every social class.
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