Thermal stores are used to store excess heat and are used alongside renewable heating technologies. There is a large variety of thermal stores available on the market that have been designed for different renewable technologies.
Solar Thermal Heating
Thermal heating stores work great with solar water heating systems as they can also allow the solar heat to be used for space heating as well as hot water. On a day with lots of solar power, the energy generated may be in excess of what is needed to heat the water, so the thermal store can use the energy for space heating and no other energy sources will need to be used.
Wood Fuelled Heating
The efficiency of biomass heating systems depends on thermal stores, especially log boilers. Instead of burning small quantities of wood throughout the day, using thermal stores means you can burn a large quantity of wood just once and the heat will be stored for use when needed. The store will also reduce the time waiting for heating or hot water once the boiler has been turned on as it will have stored heat from the last time it was on.
An air source or ground source will work more efficiently with a thermal store. This is because it does not have to continually turn on and off every time the demand is low, plus the wear on the pump and compressor will decrease. The thermal store will work as a buffer tank and store heat so the pump can work better and heat is transferred efficiently and effectively.