A cornerstone in the coming EU Energy Efficiency Directive is to develop the district heating based on Combined Heat and Power (CHP). Local authorities shall develop heat plans and power companies shall install new power capacity with CHP near heat markets. This is what we have been doing in Denmark with great success since 1980. Ramboll has taken part in this development at all stages and is ready to transfer the experience to the rest of Europe. Continue reading “European Energy Efficiency legislation adopts 35 years of Danish experience.”
Can off shore wind farms be an urban energy solution ? and what has the Island Samsø and Copenhagen in common ?
The Island Samsø is the first Island in Denmark to be net independent of fossil fuels (on annual basis) – and hundreds of energy experts from all over the world have travelled to Samsø to learn how did they it and see with own eyes
I will mention 3 important factors :
- The co-operation between the people to develop efficent and smart solutions, not least district heating and wind farms
- District heating in uran areas based on the available low carbon sources
- Off shore wind farms financed by local people
Thereby the heating in the towns have become CO2 neutral and the electricity production from the wind exceeds the remaining energy consumption for power, heating and traffic. Taking into account that the energy value of electricity is larger than the value of fuels, it is even more than CO2 neutral, however the wind is fluctuating, so the island is still dependant of the power grid.
Copenhagen has a vision to be net independent of fossil fuels in 2025. This vision is mainly based on the same factors.
Copenhagen has already 98 % of all buildings connected to the district heating grid and a large share of the production is already based on waste and biomass CHP. Therefore it will possible to be 100% independent for the heating sector within a few years. Bicycles, public transport and electric cars will also help, however there will still remain a demand for fossil fuels and not least for electricity. Therefore investments in off shore wind farms in the Baltic Sea near Copenhagen will be an obvious solution. Although Copenhagen is not yet independent of fossil fuels, the efficient district heating in the region and the bicycles have inspired many visitors in the past 25 years.
Off shore wind farms are in fact one of the most obvious and cost effective CO2 neutral urban energy solution – for two reasons:
- It is the most cost effective solution for producing electricity based on renewable energy and it would be many times more expensive and even impossible to produce the same amount of electricity with building level wind turbines or solar cells.
- The district heating and district cooling including storages, CHP plants and large heat pumps will help to integrate the wind energy in the energy system
This is probably the two most important features of the “intelligent power grid”, namely
- that it can transfer renewable energy from “near by” wind farms to supply buildings in urban areas and
- that the district energy system is the most “intelligent electricity consumer”.
It has been a dream for many to use solar energy for heating and hot tap water. So far, the only problem has been that it is expensive to install devices to catch solar energy. At individual buildings it is normally very expensive and therefore not yet a sustainable solution. Continue reading “Solar energy – a dream comes true”
At www.energymap.dk you can visit many interesting energy cases on a virtual tour. You are welcome to visit our profile http://www.energymap.dk/Profiles/Ramboll to study our urban energy solutions, cases and projects. Once you have decided what you would like to study in detail, you may consider to come to Denmark and see it real.
It is a political priority that our new buildings and our new city districts shall be sustainable. But how do we find the most sustainable energy solutions? We have an approach and an answer. Continue reading “How can we measure sustainability?”
Mother Earth is running short of fossil fuels, and climate change is a threat to human civilisation. At the same time the population grows, and people move to the cities. This is a challenge, but also an opportunity.
The Danish Government presented its “Energy Strategy 2050”, February 2011. The plan describes how Denmark can be independent from coal, oil and gas by 2050.
The strategy contains a first phase of initiatives that will reduce the use of fossil fuels by 33 percent in 2020, compared with 2009.
“Denmark is the first country to present such a specific and ambitious strategy for achieving independence from fossil fuels,” says Minister for Climate and Energy Lykke Friis.
The strategy is the first political step to implement the recommendations of “Green Energy, The road to a Danish energy system without fossil fuels“ – a comprehensive study submitted by the Danish Climate Commission, September 2010. It is available in English and Chinese.
The Energy strategy focuses on the most cost effective and sustainable energy solutions, which can be implemented right now based on the existing technology – not lease the urban energy infrastructure.
Thereby, Denmark can be the first EU country to implement the EU Energy Efficiency strategy and demonstrate the benefits of “smart cities” and “intelligent grids for electricity, district heating and district cooling”
The more difficult solutions, e.g. how to develop “green traffic”, are not yet commercial but will follow in the coming decades.
In the coming months, I will like to share my experience with you about these challenges and opportunities at this blog.
I sincerely hope many of you, dear readers, will share knowledge with me and spread the ideas.