Geothermal - Low Enthalpy

Geothermal low temperature energy is that which is obtained from extracting heat from the earth subsurface and crust. This energy is contantly beind renewed by solar radiation, precipitation and heat produced at our planet's core, which may be seen as a non-depletable reactor.

Geothermal energy is a renewable source of energy, which may be harnessed and used for building climatization (both heating and cooling) as well as obtaining hot water for domestic or process use. A set of buried pipes conduct a working fluid (usually water) to exchange heat with the Earth's crust, which is then recovered and used.



A geothermal system is comprised of:
 
  • A geothermal well, which, depending on the application, may range from a few up to hundreds of meter in depth
  • A heat pump, which allows for the heat exchange and recovery from the subsurface energy
  • A set of pipes or circuit (usually made of polyethylene) through which water flows
  • A hydraulic pump, which enables recirculation of water through the piping system
Energy is extracted at low temepratures, and by means of a thermal cycle (similar to that taking place in refrigeration equipment) that consumes some electric power in the compressor, reaches higher temperatures, therefore enabling geothermal water to be used for heating, cooling, or DHW purposes.
 
Applications:
  • Power generation
  • Direct use of heat for processes or heating
  • Radiating floors
  • Cooling with absorbtion chillers
  • Pool climatization