Print

Environment-friendly district heating to the Greater Copenhagen Area


The main objective for CTR is to utilize waste heat from refuse incineration plants and combined heat and power plants (CHPs). The company is responsible for the purchase of heat from production units and for the transport of this heat through the transmission net for sale to its five owners and to VEKS - CTR's affiliated company to the west. CTR also operates backup units and produces heat on its own account during peak load periods.

To be able to fulfill all these tasks

CTR has a 54 kilometre (34 miles) long pipeline using three booster pump stations, fourteen peak load units, and twenty-six heat exchanger stations to transfer the heat to the local district heating systems.
All these installations are managed from CTR's operation centre in Frederiksberg, using computer-based control, regulating and monitoring systems.

Energy from waste heat and refuse incineration

CTR utilizes waste heat from refuse incineration and from the joint production of electricity and heat. This strategy not only saves considerable amounts of energy, it also significantly reduces the emission of pollutants. Sulphur dioxide emissions have been reduced to less than a third of previous levels, and CO2 emissions have been halved.

CTR purchases some 70% of its district heating from the large CHPs in the Greater Copenhagen Area, more specifically from Amagervaerket, Svanemoellevaerket, H.C. Oersted Vaerket, and Avedoerevaerket. Another 25% is produced by refuse incineration plants (Amagerforbraending, Vestforbraending, and Rensningsanlaeg Lynetten). The remaining requirement is met by oil-fired heating plants.

CTR's and VEKS's two networks are interconnected so that excess heat and/or reserve capacity in the one area can be utilized if necessary in the other.

This much more effective utilization of energy gives the Greater Copenhagen Area an energy saving equal to an annual consumption of more than 500,000 tons of oil.

Approximately 10% of the total Danish requirement for heat is covered by CTR's network of pipes. This means that more than half a million people (or 90-95% of all those living in the area) enjoys the benefits of the common district heating system.

Already, the price for district heating can compete with that for other forms of energy - and what's more, district heating is also extremely reliable. CTR's heating price, which is a pool system price, is identical for all five municipalities, and has basically been kept at the same level throughout the whole of the project's lifetime.

Future requirements to technology and the environment

More stringent requirements as regards efficient sources of energy, reliability of supply, and effects on the environment were the original impetus for the rapid expansion of collective supply networks in Denmark.

And the results so far have completely lived up to expectations. A targeted and systematic usage of the very latest and most efficient technology and know-how has been an important element in this process.

The quick period of transition witnessed in the Greater Copenhagen Area has strengthened the opinion that district heating is an extremely versatile, adaptable form of supply which should be apportioned a central place in future, environmentally friendly energy structures.