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For cooling and dehumidification of unsaturated moist air, it must be passed over a coil at a temperature
- a)of adiabatic saturation of incoming steam
- b)which is lower than the dew point of incoming stream
- c)which lies between dry bulb and wet bulb temperature
- d)which lies between wet bulb and dew point temperature of incoming stream
Correct answer is option 'B'. Can you explain this answer?
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Verified Answer
For cooling and dehumidification of unsaturated moist air, it must be ...
Cooling and dehumidification : The dehumidification of air is only possible when the effective surface temperature of the cooling coil is less than the dew point temperature of the air entering the coil.
Most Upvoted Answer
For cooling and dehumidification of unsaturated moist air, it must be ...
Explanation:
To understand why the correct answer is option 'B', let's break down the different components of the options provided.
a) Adiabatic saturation of incoming steam:
The adiabatic saturation temperature is the temperature at which the air becomes saturated with moisture when it comes into contact with a wet surface. This temperature is typically higher than the dew point temperature. Therefore, passing unsaturated moist air over a coil at the adiabatic saturation temperature of incoming steam would not result in cooling and dehumidification.
b) Lower than the dew point of incoming stream:
The dew point is the temperature at which the air becomes saturated and condensation begins to occur. When unsaturated moist air is passed over a coil at a temperature lower than its dew point, the air temperature is reduced below the dew point, causing the moisture in the air to condense. This process results in both cooling and dehumidification of the air.
c) Between dry bulb and wet bulb temperature:
The dry bulb temperature is the temperature measured by a regular thermometer, while the wet bulb temperature is the temperature measured by a thermometer with a wet wick. The wet bulb temperature is always lower than or equal to the dry bulb temperature. Therefore, passing unsaturated moist air over a coil at a temperature between the dry bulb and wet bulb temperatures would not necessarily result in cooling and dehumidification.
d) Between wet bulb and dew point temperature of incoming stream:
Similar to option 'C', passing unsaturated moist air over a coil at a temperature between the wet bulb and dew point temperatures would not necessarily result in cooling and dehumidification.
In conclusion:
The correct answer is option 'B' - passing unsaturated moist air over a coil at a temperature lower than the dew point of the incoming stream. This allows for the air to be cooled and dehumidified as the moisture in the air condenses.
To understand why the correct answer is option 'B', let's break down the different components of the options provided.
a) Adiabatic saturation of incoming steam:
The adiabatic saturation temperature is the temperature at which the air becomes saturated with moisture when it comes into contact with a wet surface. This temperature is typically higher than the dew point temperature. Therefore, passing unsaturated moist air over a coil at the adiabatic saturation temperature of incoming steam would not result in cooling and dehumidification.
b) Lower than the dew point of incoming stream:
The dew point is the temperature at which the air becomes saturated and condensation begins to occur. When unsaturated moist air is passed over a coil at a temperature lower than its dew point, the air temperature is reduced below the dew point, causing the moisture in the air to condense. This process results in both cooling and dehumidification of the air.
c) Between dry bulb and wet bulb temperature:
The dry bulb temperature is the temperature measured by a regular thermometer, while the wet bulb temperature is the temperature measured by a thermometer with a wet wick. The wet bulb temperature is always lower than or equal to the dry bulb temperature. Therefore, passing unsaturated moist air over a coil at a temperature between the dry bulb and wet bulb temperatures would not necessarily result in cooling and dehumidification.
d) Between wet bulb and dew point temperature of incoming stream:
Similar to option 'C', passing unsaturated moist air over a coil at a temperature between the wet bulb and dew point temperatures would not necessarily result in cooling and dehumidification.
In conclusion:
The correct answer is option 'B' - passing unsaturated moist air over a coil at a temperature lower than the dew point of the incoming stream. This allows for the air to be cooled and dehumidified as the moisture in the air condenses.
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For cooling and dehumidification of unsaturated moist air, it must be passed over a coil at a temperaturea)of adiabatic saturation of incoming steamb)which is lower than the dew point of incoming streamc)which lies between dry bulb and wet bulb temperatured)which lies between wet bulb and dew point temperature of incoming streamCorrect answer is option 'B'. Can you explain this answer?
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