Soojusallika
Soojusallika is the Estonian term for a source of thermal energy used to heat a system or process. In thermodynamics, a heat source is a reservoir or device from which heat flows to a cooler system that requires heating.
Soojusallikas can be natural or artificial. Natural heat sources include geothermal reservoirs and solar thermal energy,
In practical energy systems, heat sources are used in district heating, residential space heating, hot water
Performance is described by metrics such as the coefficient of performance (COP) for heat pumps and efficiency
Examples include a geothermal heat source supplying a heat pump, a solar thermal system feeding a hot-water