Case

Offshore wind to be integrated in the energy network

Ramboll

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Ramboll is a leading multidisciplinary independent consultancy company Our 1,500 experts in energy provide our customers with cost-effective energy and climate solutions that meet today’s standards. We are among the leading consultants in the world within important energy, climate mitigation and climate adaption services: •Sustainable development of liveable cities •Least cost energy planning and strategies •District heating and cooling •Combined heat and power •Heat pumps •Waste to energy •Large scale solar water heating •Thermal storage tanks and storage pits •Wind farm infrastructure on and off shore •Power grids •Integrated smart energy system •Climate strategies •Waste management •Biogas •Exploration of oil and gas •Natural gas transmission and distribution •Natural gas storage Our multidisciplinary approach also includes other renewable sources, hydro power, geothermal energy, energy efficiency in building and industry and low energy buildings. Furthermore, Ramboll’s experts address global water and climate challenges by working across the water cycle from water resources and supply, processing and treatment, to sewerage and discharge. Working with municipalities, utilities, and industrial clients we draw on multidisciplinary expertise to create innovative, sustainable and liveable solutions for our customers and society. Our more than 700 water consultants – mainly engineers, hydraulic specialists, water consultants and landscape architects, but also economists, legal advisors and management consultants – work with water projects on a global scale with more than 50 years of proven experience. Discover more in this video about Ramboll's global water practice. To learn more about Urban Energy Solutions, see Rambolls blog

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There is in fact more wind energy resources than we need, and the largest wind turbines can produce electricity at a competitive price.

However there are problems:

  • the onshore resources are limited for environmental reasons
  • the electricity is generated as the wind blows – sometimes when it is not needed and it can not be stored

Our solutions can overcome these problems, namely offshore wind farms based on our experience from offshore oil and gas and district heating systems with CHP, heat pumps, electric boilers and thermal storages. Therefore Denmark may increase the share of wind for electricity from 20 to 70% in a few years. Ramboll is a leading consultant in both solutions.
Although offshore wind farms are more expensive than onshore farms per. installed megawatt, they are of special interest because:

  • the environmental/visual impact is less
  • the wind is stronger and more constant
  • the wind farms can be larger and benefit from effects of scale, and
  • the total wind resources are much larger in countries with coast lines.

More information
In order to reduce the construction and maintenance costs our experience from offshore oil platforms is utilized, e.g. for the foundation and the precautions to meet the harsh offshore environment.

In order to reduce the costs in the power system for integrating the wind and in order to avoid waste of wind energy, the water based district heating systems are vital.

  • Electric boilers and heat pumps closest to the wind farm can utilize all the peak production and thereby reduce the costs and environmental impact of power transmission lines
  • Electric boilers and heat pumps can operate only in periods with surplus wind energy
  • Efficient CHP plants can supplement the wind energy when the demand exceeds the wind energy
  • In order to compensate for unforeseen fluctuations in the wind energy, CHP plants and running heat pumps (a quick stop) can up-regulate, whereas electric boilers and heat pumps can down-regulate (a quick start)
  • Finally huge thermal storages can compensate for long-time fluctuations in wind as well as in hydro energy

More info at the Ramboll profile and

http://blog.ramboll.com/urbanenergysolutions/

 

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