March 2022: PDF to download from EGEC Geothermal [Click Here]

Geothermal is:
• Cheaper than fossil and other renewable heat sources in many Member States according to the International Energy Agency ADEME, the French energy agency, found that the levelised cost of geothermal district heating was €15 MWh compared to €51 MWh from fossil sources already in 2019.
• Good for property values: In Sweden, household retail agencies found houses with Geothermal Heat Pumps increased property prices by about €10-12,000.
• The ‘go to’ solution for urban and rural cities: Cities all over Europe are opting for large-scale geothermal district heating systems.
• Grid balancing: Geothermal provides baseload electricity solving security of power supply threats by removing dependence on the import of fossil fuels from third countries.
• Available everywhere. Heat reservoirs and basins have only been mapped in some regions and in some countries. Over 25% of the EU’s population can be supplied by geothermal district heating by using resources mapped in 2013. Combined with geothermal heat pumps , nearly half of the EU’s heat demand can be met by 2030.

The term ‘geothermal energy’ refers to any heat derived from the ground, from depths of a few metres to multiple kilometres beneath the Earth’s surface.

 Low-grade heat stored in the shallow subsurface (<200 m) is largely derived from solar radiation that is absorbed by the ground and distributed via natural groundwater systems and artificial structures such as flooded coal mines. The ground acts as a solar battery and, for this heat, utilisation usually requires a heat pump. This energy is widely described as ‘ground-source energy’ or ‘shallow geothermal energy’.

There is no strict definition for ‘deep geothermal energy’, but the UK Government has adopted the term to refer to heat resources derived from depths of >500 m. The heat of the Earth increases with depth, a phenomenon described as the geothermal gradient. This heat is partly the primordial heat from when the Earth was formed and partly heat generated from within the Earth’s crust from the decay of mildly radioactive elements. This upward heat flux varies across the globe, but in the UK is around 27°C/km (Busby, 2014). Assuming an average annual air temperature of 12°C, this means that subsurface temperatures at 1000 m, 3000 m and 5000 m are around 39°C, 89°C and 139°C, respectively.

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heat pumpFor Commercial, Industrial and substantial private properties installations

With the ever rising costs of gas, oil and electricity, with attendant heating, hot water and cooling needs - now is the right time to consider [at long last - when we consider that Sweden has been installing heat pumps for over 50 years - heck I remember learning about them on my Construction Degree in 1972]

  • · Heat pumps for industrial and commercial use
  • · Heating power from 50 kW to 1000 kW (and more)
  • · Working fluid: R134a (alternative R407C)**
  • · Multistage options
  • · Bespoke according to your demand

*Can be powered by an ORC [Organic Rankine Cycle] THE RANKINE CYCLE The Rankine Cycle is a thermodynamic cycle that converts heat into work. The heat is supplied to a closed loop, which typically uses water as working fluid. The Rankine Cycle based on water provides approximately 85% of worldwide electricity production. The Organic Rankine Cycle's principle is based on a turbogenerator working as a conventional steam turbine to transform thermal energy into mechanical energy and finally into electric energy through an electrical generator. Instead of generating steam from water, the ORC system vaporizes an organic fluid, characterized by a molecular mass higher than that of water, which leads to a slower rotation of the turbine, lower pressures and no erosion of the metal parts and blades.

** A growing focus on the environmental impact of refrigerants is fuelling demand for refrigeration solutions that can provide satisfactory cooling performance with a lower impact on global warming. This is propelling environmentally friendly refrigeration solutions to the top of the corporate sustainability agenda. In addition, local legislation is increasingly targeting refrigerant gases with high Global Warming Potential (GWP). R134a and R407c