Geothermal

Question 1

What is geothermal Energy

Answer 1

Exploiting the large amount of heat under the earths surface to create steam which will drive a turbine.

Question 2

How is it the heat extracted from the ground

Answer 2

A bore hole is drilled deep into the ground and then cold liquid is pumped into the ground which displaces hot liquid gas to rise to the surface.

Question 3

Explain the key components of a heat pump

Answer 3

Water pipes are passed through an evaporator which transfers heat to a refrigerant. This then passes through compressor which changes the liquid to a gas and adds heat. This is then pumped to the condenser which transfers heat from the gas to the central heating system.

Question 4

Disadvantages of heat pumps

Answer 4

• Increased strain on electricity network with demand for heat pumps increasing
• Poor performance if incorrectly installed.
• ASHPs perform badly in cool or humid climates.