Liquids called working fluids are used by heat pumps

These fluids have a boiling point that is much less than that of the temperature of the heat source. The fluids are also used to transmit the resultant heat created into the area intended to be heated. This is done by passing the fluid through a heat exchanger where the existing heat is removed from the fluid. This extraction is work and causes the temperature of the liquid to go up to the point that it boils and evaporates.
Read more:
此条目发表在 About 分类目录。将固定链接加入收藏夹。