What is it?

 

Thermal energy storage systems use sunlight or excess thermal energy to provide heat or electricity.  

 

 

What are some examples?

 

Solar ponds are a common collection system of the sun's rays. The pond is comprised of water divided into three layers; each layer has a different salt content. This allows the lowest level (with the highest salt concentration) to reach near boiling point temperatures. This water can then be run into a building for hot water or used for heating or electricity production.

 

Rock heat storage systems use the thermal properties of rock to provide heated insulation for buildings. The rock can be warmed by the sun and then further heated by electric heaters. The rock retains this heat for a longer duration than water and can provide heating for buildings.

 

 

Advantages:

• low cost, low maintenance systems

• zero-emission

• solar ponds can be used for hot water, heating, or electricity

• rock heat storage provides natural insulation

 

 

Disadvantages:

• solar pond requires land area for a body of water

• rock heat storage is only for heating