The combination of Geothermal System and Photovoltaic reduce energy consumption of a building to nearly zero
The combination of Geothermal System and Photovoltaic they can turn a building into an NZEB i.e. a building with almost zero energy consumption. It is worth noting that both systems are part of the RES (Renewable Energy Sources) family.
But in a building these are used for a different purpose:
The Photovoltaic installation has the role of the electricity producer (Producer)
The Geothermal System has the role of the Heating/Cooling system (Consumer)
At this point you raise the reasonable question
“Since the Geothermal system consumes energy why does it belong to the RES family?”
The following tables give the answer to this question
According to the above data, the Geothermal system:
- With just 1Kw it returns 3.5-5Kw for Heating or Cooling. It is clarified that the range 3.5-5 is given due to the variation in undisturbed soil temperature which is a characteristic of each region (e.g. Greece 16-21oC while Sweden 8-13oC)oC ενώ Σουηδία 8-13oC)
- It doesn’t change its performance as it is not affected by external conditions as is the case with Air Source Heat Pump or A/C . Therefore, Geothermal system performs the same in all climatic conditions (eg very high temperatures or very low).
- It reduces the required installed power and therefore the size-area of the Photovoltaic system (solar).
Therefore the Geothermal system belongs to the family of RES (Renewable Energy Sources) because it takes advantage of the energy stored inside the Earth which is independent and naturally clean!
