Thermonet in the detached house neighborhood of Bromarken, Jyllinge, DK - Stage A.
5G network
Picture credits: Damgaard Rådgivende Ingeniører
Facts at one glance
Status of the project:
Commercially operating
Operation mode:
Heating network
Geothermal source:
Shallow / Ambient Geothermal
Max heat capacity:
< 1MW
Network generation:
5G
Year of operation start:
2020
Contact:
kontakt@termonet.dk
Description of the project
The thermonet of Bromarken, stage A, was the first thermonet project by the company Lind & Risør, who afterwards went on to establish the termonet of Bromarken, stage D and Rendebjergvænget, Tune. The thermonet was incorporated in the price of the house and property for the new owners, hereby making the thermonet owned in parts by each household. A small heating association is in charge of servicing the thermonet, while each household are in charge of their individual heat pump.
A total of 49 townhouses are a part of stage A at Bromarken, each with an individual heat pump. The outer part of the thermonet is made up of six vertical geothermal boreholes of 150 meters depth. Next to the drillings is a communal pumping station which is supplementing the circulation pump in each individual heat pump. The thermonet as a whole is a closed circuit. The brine is a combination of 70% water and 30% IPA.
Highlights of the project
The thermonet has been an especially suitable heating solution to the area, as it could be implemented into the planning form the start.
The heat pumps of the thermonet are smaller and less noisy than a solution of only individual heat pumps.
The biggest challenges / obstacles
There has been som challenge regarding air in the brine of Stage A, which can probably be solved in other projects by securing sufficient circulationflow. A consequence of lack of ventilation is air plugs, which can shut down heat pumps.
Detailed characteristic of the project
Site description
Address
Dagmarvej, 4040 Jyllinge, Denmark
Status of the project
Commercially operating
Year of operation start
2020
Type of geothermal Heating / Cooling network
Heating 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
Depth range
1-150
Involved companies
Owner / operator
Lind & Risør
Planner / installer
Damgaard Rådgivende Ingeniører
Driller
GeoDrilling
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
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
70% - 80%
Annual operation hours for heating
2000 hours - 4000 hours
Annual heating production
< 1 GWh
Annual heating production share
70% - 80%
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 %