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Evaporation
This the water cycle on the Earth.
Loss of water (dehydration, evaporation).
The substantial reason of water loss is the evaporation.
Boiler feed is the fresh or treated water to replenish the water loss though evaporation or leak
Insensible
Insensible
Heat loss. Conduction, evaporation, and radiation.
Because that way it won`t loss the water it has already
For what?It requires a heat gain for the water,but a heat loss for whatever the water is in contact with.
Reduce loss of water through transpiration / evaporation.
They prevent excessive loss of water through evaporation.