How Do Solar Thermal Panels Work?
There are two different types of Solar Thermal collectors
(panels) for domestic hot water...
- Flat Plate
- Evacuated Tube collectors
Both panels operate by using the sun’s energy to heat liquid contained within the panel or tubes.
A controller monitors the temperature of the liquid in the panel and the temperature of the water in the hot water tank.
Whenever the liquid in the panel is at a higher temperature than the water in the tank it is pumped through a heat exchanger which effectively increases the temperature of the water in the tank.
A typical Solar Thermal system will be able to supply 70% of your hot water needs. Your conventional boiler or immersion heater will operate in the normal manner to heat water whenever the required temperature is not reached.
For domestic hot water you will typically need between 2 to 4 panels using approximately 3 to 4 sqm of roof space. To make maximum use of the sun’s energy, Solar Thermal systems need to be positioned in a southerly aspect (South West through to South East).
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