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In most of water coolers, the atmospheric air is made to pass through a wet khas-khas or bamboo mat to render a surface cool in summer. Thermodynamically this process may be called
- a)sensible cooling
- b)cooling and humidification
- c)cooling and dehumidification
- d)adiabatic saturation
Correct answer is option 'D'. Can you explain this answer?
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In most of water coolers, the atmospheric air is made to pass through ...
Adiabatic saturation in water coolers
Adiabatic saturation is a thermodynamic process in which the temperature of air is reduced by adding moisture to it. This process is used in water coolers to cool the atmospheric air passing through a wet khas-khas or bamboo mat during summer. The process involves the following steps:
1. Air passes through a wet mat: In a water cooler, atmospheric air is made to pass through a wet khas-khas or bamboo mat. The mat contains water droplets which evaporate when the air passes through it. This evaporation process cools the air.
2. Evaporation cools the air: Evaporation is a cooling process which requires energy. This energy is obtained from the surrounding air which loses heat to the evaporating water droplets. As a result, the temperature of the atmospheric air passing through the wet mat is reduced.
3. Humidity increases: As the air passes through the wet mat, it picks up moisture from the water droplets. This increases the humidity of the air.
4. Adiabatic cooling: The process of evaporative cooling is an example of adiabatic cooling. In this process, there is no exchange of heat between the air and its surroundings. The energy required for the evaporation process is obtained from the surrounding air. As a result, the temperature of the air passing through the wet mat is reduced without any external heat input.
Conclusion
In conclusion, water coolers use the process of adiabatic saturation to reduce the temperature of atmospheric air passing through a wet khas-khas or bamboo mat during summer. The process involves evaporation of water droplets which cools the air and increases its humidity. Adiabatic cooling, which requires no external heat input, is the key principle behind this cooling process.
Adiabatic saturation is a thermodynamic process in which the temperature of air is reduced by adding moisture to it. This process is used in water coolers to cool the atmospheric air passing through a wet khas-khas or bamboo mat during summer. The process involves the following steps:
1. Air passes through a wet mat: In a water cooler, atmospheric air is made to pass through a wet khas-khas or bamboo mat. The mat contains water droplets which evaporate when the air passes through it. This evaporation process cools the air.
2. Evaporation cools the air: Evaporation is a cooling process which requires energy. This energy is obtained from the surrounding air which loses heat to the evaporating water droplets. As a result, the temperature of the atmospheric air passing through the wet mat is reduced.
3. Humidity increases: As the air passes through the wet mat, it picks up moisture from the water droplets. This increases the humidity of the air.
4. Adiabatic cooling: The process of evaporative cooling is an example of adiabatic cooling. In this process, there is no exchange of heat between the air and its surroundings. The energy required for the evaporation process is obtained from the surrounding air. As a result, the temperature of the air passing through the wet mat is reduced without any external heat input.
Conclusion
In conclusion, water coolers use the process of adiabatic saturation to reduce the temperature of atmospheric air passing through a wet khas-khas or bamboo mat during summer. The process involves evaporation of water droplets which cools the air and increases its humidity. Adiabatic cooling, which requires no external heat input, is the key principle behind this cooling process.
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In most of water coolers, the atmospheric air is made to pass through a wet khas-khas or bamboo mat to render a surface cool in summer. Thermodynamically this process may be calleda)sensible coolingb)cooling and humidificationc)cooling and dehumidificationd)adiabatic saturationCorrect answer is option 'D'. Can you explain this answer?
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