Pit Heat Storage
Pit Heat Storage
- Client: Høje Taastrup District Heating and VEKS
- Role: Consultant
- Contractors: DS Flexhal, Brøndum, and Kallesøe
- Area: 400 m²
- Construction Period: 2020-2021
The project involves the establishment of a pit heat storage facility with a capacity of 70,000 cubic meters, along with associated technical facilities in the form of a pumping and heat exchanger station.
The storage facility is located on Bondehøjvej, just north of the Holbæk Motorway, on land previously used for agriculture.
The storage holds 70,000 cubic meters of water and has a charging and discharging capacity of 30 MW. In terms of energy, the facility has a storage capacity of 3,300 MWh.
This project is the first of its kind to utilize pit heat storage in one of Denmark’s major district heating systems, where the storage is expected to be charged and discharged approximately 25-30 times a year – unlike existing Danish pit heat storage systems that primarily function as seasonal storage.
Technical Installations
The heat exchanger station is a building filled with large, complex piping systems and heat exchangers, where heat energy is transferred to and from the pit heat storage depending on whether it is being charged or discharged.
Norsyn has provided technical consultancy regarding the establishment of the associated technical installations, including the heat exchanger station and pumping station, as well as for the building itself that houses the technical installations.
The building accommodates two 30 MW heat exchanger systems, which must be able to both charge and discharge the pit heat storage in conjunction with VEKS’s transmission system and Høje Taastrup District Heating’s distribution network.
The project’s relatively high complexity required the involvement of many employees, where individual competencies were applied in planning, design, and execution.
