Latent Heat

The heat required to change the state of substance, without change in temperature, is called latent heat, or latent heat. Theoretically, any substance can be gaseous, liquid or solid, depending on its temperature and pressure. He takes heat change of a substance from solid to liquid or from a liquid to a gas.

For example, it takes 144 BTU latent heat until the change of 1 kg of ice in 32Вєf up to 1 pound of water on 32Вєf. It takes 180 BTU sensible heat to raise the temperature of 1 kg of water 180С”F from 32Вєf to 212Вєf. He takes 970 BTU latent heat until the change of 1 pound of water to steam when 212Вєf. When the opposite is equal to the amount of heat taken out or refused substances.

This exchange of heat, or the ability of a medium, such as water, to take and give heat, is the basis for most systems, heating and Air conditioning industry. Most of the features of the industry concerned about adding or removing heat at a Central point and distribution of heated or cooled medium whole structure, warm or cold space.