The district heating system in Denmark is strong and widespread. This also applies to Aarhus as more than 95 % of the inhabitants are connected to district heating. Throughout many years, especially oil and coal made it possible for the citizens of Aarhus to turn on heating by turning a thermostat. This picture will change this year when Aarhus – as one of the first large urban communities in Denmark – at the end of 2016 supplies the citizens and companies of the municipality with district heating with very low CO2-emissions. This is the first step of a journey towards CO2-neutral energy supply, which is a central feature in transforming Aarhus into a non-fossil community.
The previous Climate Plan of the municipality 2012-2015 and the Climate Heating Plan from 2010 outline the municipality’s path towards independence of fossil fuels, with the great target of being CO2-neutral in 2030. Already this year, the City of Aarhus reaches the goal of heat supply based on CO2-neutral energy sources – as one of the first large municipalities in the world ever. The two big events take place this autumn.
In October, the last block of the DH station at Studstrup changes from burning coal to burning wood pellets. Thereby, we get rid of a very large part of the heat and electricity supply that is not yet CO2-neutral.
At the end of the year, the biomass firing CHP plant, which is under construction at Lisbjerg, will be connected to the district heating network. The plant, which will be one of the biggest of its kind in Denmark, can supply up to 20 per cent of the district heating used in the Aarhus area based on biomass from farming industry. As heat is produced together with electricity, it also means that citizens and companies can look forward to local production of electricity with very low CO2-emissions.
Changing district heating to biomass is part of AffaldVarme Aarhus’ strategy on development of future sustainable energy supply. The strategy does not consist of change to biomass alone; it also includes testing and developing new solutions. Thus, the green transition of district heating does not end when, already in 2016, we reach the target of green district heating. AffaldVarme Aarhus is constantly working on developing and supplementing the heat supply with new sustainable energy sources that can make district heating even greener.
将区域供热的燃料改成生物质，是AffaldVarme Aarhus未来可持续能源供应发展战略的一部分。战略不仅包括改成生物质，而且包括测试和开发新的解决方案。因此，2016年我们实现了绿色区域供热的目标，并不意味着区域供热绿色转型已经结束。AffaldVarme Aarhus不断致力于开发和补充针对供热的新可持续能源，让区域供热变得更加环保。
One example is the electric boiler, which was commissioned at the DH station at Studstrup in 2015. It is switched on when the price of electricity from windmills is very low, and heat can, thus, be produced at a very low price.
The same applies to another example, namely the operation of a new heat pump, which is to be built in a completely new energy plant at Aarhus Island in 2017. It extracts heat from the seawater in the Bay of Aarhus and, thus, contributes with district heating from sustainable energy. This is a supplement to the existing heat supply to the many new homes and companies, which will be built at Aarhus Island and in the centre of Aarhus in the years to come.
The transition to green district heating takes effect the same year that the new Climate Plan of the City of Aarhus is considered by the City Council. The Climate Plan focuses on selected areas, which are important for Aarhus in order to move towards a fossil-free future. For, the climate challenge is one of our generation’s biggest challenges. It is a global challenge, which requires local action. Aarhus has made good progress already – and the municipality takes an enormous step changing to biomass within district heating – however, there is still far to go. Therefore, Aarhus is preparing an ambitious plan for the coming years, which can help Aarhus closer to becoming a society that does not harm the planet’s climate.