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Procedure for Closed Loop Geothermal System

Stage 1
Preliminary study-Total Cost

1) Visit to the site of project- data collection

  • Topographical
  • Building Load Calculations (if exists)
  • Geological formations of the application area

2) Preliminary study which includes:

  • Data analysis project description.
  • Assessment of the geology at study area includes Geological section.
  • Initial system design and dimensioning of its individual elements.
  • Detailed description of the system and its installation process.
  • All stages of the project with detailed costs.
  • Financial feasibility study of the project and its payback period.
Stage 2
Issue of Permit - Final Design - Project supervision
  1. Simulation of the geothermal system to verify it’s completeness
  2. Completion of the Geothermal System Study.
  3. Collections of supporting documents for the issuance of the permit of install geothermal system.
  4. Completing the file and submitting it for the issuance of the permit (1-2 months usually).
  5. Supply of equipment-materials for the construction of the project.
  6. Issuance of the permit and installation of the geothermal system under our supervision (includes issuance of a paravolo (GR) from a financial cost of 300 euro).
Οριζόντια τοποθέτηση γήινου εναλλάκτη θερμότητας 2
Stage 3
Procedure for the installation of the geothermal system (under our supervision)
Vertical placement of Geo-exchanger
  1. Drilling of boreholes-placement of geo-exchangers- grouting of boreholes.
  2. Geo-exchanger pressure test
  3. Thermal Response Test (required in large projects)
  4. Construction of piping networks to connect to the mechanical room.
  5. Flushing-Purging of the geothermal system.
  6. Start up the system
Horizontal placement of Geo-exchanger
  1. Construction of Geo-exchanger
  2. Excavation – Backfilling
  3. Geo-exchanger pressure test
  4. Construction of piping networks to connect to the mechanical room.
  5. Flushing-Purging of the geothermal system.
  6. Start up the system

Table 1

Cost of Geothermal System ‘’Closed Loop’’

Type
MinKw)
Average (€/Kw)
MaxKw)
Ground Source Heat Pump
308
477
646
Horizontal Ground Loop
304
722
1140
Vertical Ground Loop
608
1824
3040

**Table 1 (Source: ‘’RETScreen Expert ‘’ Clean Energy Management Software version 8.1)

Total Cost= Kw*GSHP Cost + Kw*Cost (Horizontal or Vertical) Ground Loop

The cost of a closed loop geothermal system depends on:

  • The building heating and cooling Loads (peak loads it will need to cover).
  • The geology of the area (increases and reductions in drilling and grouting costs).
  • The available area (horizontal or vertical).
  • The quality of the materials.

Provided Services

1. Water Well Drilling

2. Geothermal Energy

3. Geotechnical Research

4. Mining research

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