The demonstration works have been mostly completed. Monitoring started in 2021; a minimum of 12 month of data will be collected to evaluate and validate the pros and cons of the various solutions investigated by the project. On this page you will find information and public reports regarding the demonstrations.

Connection of Prosumers in Høje Taastrup

The transition to low-temperature supply in district heating networks as well as the transition towards renewable heat sources require new technical solutions that allow the introduction of new actors in the district heating sector. These new actors are defined as prosumers that are both connected to the district heating network as consumers and can deliver heat to the network. In Høje-Taastrup Municipality, different prosumers are already connected or in the process to be connected to the district heating and cooling network.

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PV powered cascade heat pump installed in the Østerby district

The transition to low-temperature supply in district heating networks as well as the transition towards renewable heat sources allow the introduction of new technical solutions in the district heating production. In Høje-Taastrup municipality a new heat pump system at the shopping mall CITY2 has been installed. The system supplies the new low-temperature district heating network in Østerby district demo case, including business and nearby hotels, recovering the waste heat from the cooling system.

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New type of PE-RT pipes with leakage detection

The possibility to detect potential leakage in a DH (or LTDH) system is crucial. Leakage reduces the insulating ability of the foam in the pipes. Leakage from the media pipe will also eventually find its way out of the casing and might undermine the ground. In COOL DH, plastic media pipes are used instead of the classic steel media pipes. This requires a slightly different solution to detect leakage.

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Incorporating a distributed, local waste heat source into the LTDH grid

As the temperature in the DH grids generally, and LTDH grids specifically, is gradually lowered it allows for new types of production to be included in the grid. The value of waste heat from “prosumers” has been considered too low in terms of temperature and volume, but that is no longer the case.

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New type of substations to meet the requirements of LTDH

The transition to low-temperature supply in district heating networks requires new technical solutions to meet the heat requirements of the consumers and guarantee their safety. The new distribution system at the COOL DH demo site in Høje-Taastrup does just that!

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Converting Østerby area from traditional DH (85/50°C) to LTDH

The report provides information about the final design and the implementation of the low-temperature district heating network. It can be used as a guideline of the installation process and the challenges found during the installation process and a reference for future similar projects.

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Local energy solution with heat pump hot water topping

Xplorion is a 3300 m2 passive house with 54 apartments and a café / restaurant at the corner. Kraftringen has demonstrated a supply and user installation of ultra low temperature 5th generation district heating in the Xplorion-building.

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Innovative three pipe solutions

The circulation of warm water to produce hot tap water is a bad solution for both house owners and energy companies as it results in increased energy consumption and an increased return temperature. Even though Xplorion is already an environmental friendly building, Kraftringen has demonstrated a solution to reduce energy consumption even further.

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Heat-recovery enabled pipes

In classic district heating grids, up to 15-20 % of all the energy produced does not reach the customers due to heat losses. This is a weakness with district heating which we are addressing in COOL DH.

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