Heat+Pump


 * __[[image:heat_pump.JPG align="right"]]Heat Pump__**

Below is a schematic of a heat pump:

Heat flows from a **//hot//** body to a **//cold//** body. But a heat pump is designed to pump energy from cold to hot.

Mechanical work is done on the heat pump (W)

The pump takes **Q** from the cold body and gives energy **Q** + **W** to the hot body.


 * //Refrigerators, freezers and air conditioners use heat pumps to pump internal energy from cold to hot.//**


 * Ever wondered how a fridge works?**

http://www.ior.org.uk/ior_/fantastic_fridges_site/science/fridge1/fridgediag.htm

See also Josie's page