Twenty year old thermonet on Nymøllevej, Barmer, DK
5G network
Facts at one glance
Status of the project:
Commercially operating
Operation mode:
Heating and cooling network
Geothermal source:
Shallow / Ambient Geothermal
Max heat capacity:
< 1MW
Network generation:
5G
Year of operation start:
2002
Contact:
kontakt@termonet.dk
Description of the project
The thermonet was established approximately 20 years ago, and was initiated by the local owner, who operates a company producing heat pumps. The company produces, due to its activities, a periodically large amount og excess heat, while the need for heat and cooling depends on the time of year. Due to the building density on the property, it was not possible to establish horizontal collectors. Luckily, the neighbouring property had the space needed, and would also be able to benefit from the thermonet.
The thermonet supplies a total of three buidlings – a household, a factory and a private commercial property. The thermonet supplies both heating and cooling.
The energy source consists of 1000 meters horizontal geothermal pipes, and connects to two heat pumps, one on each property. The brine is 20% ethanol and 80% water. Whenever heat pumps are being tested in the factory, they deliver excess heat back into the thermonet, ensured by a water cooling system and heat exchangers.
Highlights of the project
Generally, a thermonet is more affodable than individual geothermal heating, due to the establishing proces. Furthermore, the properties will not have to undergo excavation.
By utilizing excess production heat, thermonet can contribute to the sustainability profile of companies. The companies can get rid of their outdoor condensators and ventilators, and neighboring residents can benefit from the otherwise wasted heat.
The biggest challenges / obstacles
Detailed characteristic of the project
Site description
Address
Nymøllevej, 9240 Barmer Nibe, Denmark
Status of the project
Commercially operating
Year of operation start
2002
Type of geothermal Heating / Cooling network
Heating and cooling network
Type of geothermal technologies involved
Shallow / Ambient Geothermal
Are heat pumps used within this project?
yes - located at the clients
Heating network generation
5G
Number of clients supplied
< 10
Depth range
1
Types of used geothermal sources
Source
Depth range
Temperature range
Purpose
Soil/rock - closed loop
< 20 meters
< 20°C
Heat extraction
Soil/rock - closed loop
< 20 meters
< 20°C
Cooling
System design
Heat sources included in the network
Monovalent - geothermal energy is the only heat source
Max heating capacity supplied by geothermal energy
< 1MW
Share of geothermal energy
60% - 70%
Max cooling capacity supplied by geothermal energy
< 0.2 MW
Share of geothermal energy
60% - 70%
Annual operation hours for heating
2000 hours - 4000 hours
Annual operation hours for cooling
< 500 hours
Annual heating production
< 1 GWh
Annual heating production share
60% - 70%
Annual cooling production
< 1 GWh
Annual cooling production share
> 90%
Energy conversion factor linked to the use of geothermal energy
< 5
Heat source for peak load supply
Geothermal
Has backup system?
Yes
Backup system
Electricity
Share of fossil fuels for annual gross heat production
0 %