Member state | DENMARK |
Case study | Amager |
Description | Hovedstadsområdets Geotermiske Samarbejde (HGS) (joint venture between four energy, transmission and distribution companies) |
Region>City>location | Amager |
Owner | Hovedstadsområdets Geotermiske Samarbejde (HGS) (joint venture between four energy, transmission and distribution companies) |
Operator | DONG Energy (geothermal loop incl. heat exchangers) and HOFOR (heat pump plant) |
Installed capacity ( MWth) |
1500 |
Installed geothermal capacity | 14 MW (27 MW including absorption heat pump driving heat) |
DH length (m) |
> 2000 km |
Inhabitants connected | > 60000 (> 1 million inhibitants) |
Design of the DH | Water based transmission and local networks with pre-insulated pipes |
subsurface and surface technical schemes |
One production and one injection well. Direct heat exchange and absorption heat pumps. |
significant pictures if any | |
Operating Temperature of the DH | Local net, winter/summer: Supply: 89/80 °C; Return: 52/48 °C |
Temperature of the geothermal ressource (production – injection) |
74 ° C / 17 ° C |
Geothermal flow rate |
Up to 235 m3/h |
Heat Pump if any (power in Mwe and COP) |
Absorption heat pumps: 13 MWth / COPth 1,8 |
Production of heating and/or cooling | For district heating |
Others uses (drinking water, cascade uses…) |
No |
Dates of begining and end of construction | 2001-2005 |
Planing of the operation (from pre-studies to full completion) |
1999-2005 |
Organisational scheme | |
Administration scheme | |
Investement for geothermal well |
15 million euro for two wells |
Investement for geothermal heating station |
13 million euro |
Investement for DH network and substation |
Not part of geothermal plant |
Financing (banks, funds, PPP…) |
Owner |
Amount of Subsidies if any |
1 million euro for seismic survey from national funding |
Difficulties faced | Increased injection pressure partly reduced by clean up pumping and soft acidizing. |
Administrative permits | Licence for exploration and exploitation of geothermal energy for the purpose of district heating pursuant to the provisions of the Danish subsoil act. Approval from municipality for heat production pursuant to the provisions of the Danish heat supply act. Approval from municipality for discharge of geothermal water to the sea after mixing with cooling water from power plant. |
Cost of the produced MWh | |
Cost of the MWh sold | Not applicable. Consumers pay all costs for heat from the net. This includes network costs and costs for heat production from different heat production units. |
Comparison with fossil energies | |
Final energy cost structure | |
Taxes | No tax on heat from the subsurface, but taxes on energy used at the plant and on equipment. VAT on all costs for the plant. |
Pay back | |
Innovation if any | The use of absorption heat pumps driven by different heat sources including biomass CHP and incineration CHP, which in some cases makes it free to drive the heat pumps. |
Engineering |
Amager
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