Thermonet of Bromsmae in Brenderup, DK
5G network
Picture credits: Municipality of Middelfart
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:
2022
Contact:
kontakt@termonet.dk
Description of the project
In 2017, the Municipality of Middelfart started the project of establishing a thermonet in Brenderup as part of the subdivision of 13 new building properties, as there is no access to district heating in the area. As all properties has yet to be sold, the thermonet is not in full operation yet.
The thermonet consists of eight vertical 100 meter deep boreholes, connected by horizontal pipes.
Except for the buyers of the properties being responsible for buying and installing a heat pump, the thermonet is ready to operate. The coming houses are to be connected as they are build. As the municipality were the owner of the properties, it was decided that all coming owners of the properties are required to connect to the thermonet. The owners will hereby share the expense sof the comunal thermonet, and thus own the thermonet themselves in time.
Highlights of the project
The Municipality of Middelfart are confident that thermonet is the proper solution for any area out of reach of district heating.
It has been an advantage for the municipality to own the area, so that they could dig down the thermonet right away and include the costs in the property prices.
Thermonet is not only an economic alternative to individual solutions, but also from a perpective of comfort, as noise nuisance can be avoided.
The biggest challenges / obstacles
Instead of thinking that all details of legislation must be in place before starting, it can sometimes be positive to go ahead and figure things out along the way. This also correlates to the notion that it is advisable to start the dialogue and cooperation with the operators as early as possible.
Detailed characteristic of the project
Site description
Address
Kirkevej, 5464 Brenderup, Denmark
Status of the project
Commercially operating
Year of operation start
2022
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 - 100
Involved companies
Planner / installer
Municipality of Middelfart
Driller
GeoDrilling
Planner / installer
Klimadan
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 - 400 meters
< 20°C
Heat extraction
Soil/rock - closed loop
20 - 400 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
> 90%
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 %