From Denmark

Large-scale wind turbine erected

The first of six 2 MW NEG Micon wind turbines is now in operation at Lammefjorden, not far from the CADDET Danish National Team’s office in TŅllŅse.  Currently the largest commercially-built wind turbine in the world, it is 104 m high and has a hub height of 68 m.  The remaining five turbines will be completed within the next few months.  The six turbines are expected to produce 24 GWh/year. The site is on reclaimed land in an area with wind speeds of 4–14 m/s, and are designed to produce maximum power in these conditions. A local power utility company owns three of the turbines and the others are owned co-operatively by people in the neighbourhood. The cost of one of these wind turbines is about DKK 15 million (where DKK is the Danish kroner).

New low-energy greenhouse reduces energy consumption

Commercial production of greenhouse products in colder climates is highly energy-intensive, with fossil fuels normally used to provide heating and lighting.  As much as 13 kWh may be consumed to produce just 1 kg of tomatoes or cucumbers, which corresponds to more than their own weight in oil. Since 1985, various projects to develop a commercial low-energy greenhouse have been carried out at Denmark’s Folkecenter for Renewable Energy. The latest of these uses wind energy, mobile insulation and a heat pump. Electricity for the heat pump and lighting is generated by a wind turbine. Mobile insulation of the glass faćade reduces heat loss during the night and allows the sun in during the day.  The greenhouse is dehumidified by the heat pump. This type of greenhouse is more expensive to build than a traditional one. However, calculations have shown that the new concept is economically feasible in Denmark if a government grant is obtained.  Furthermore, ecologically-produced food can command a higher sales price in Denmark.

For more information on these projects contact the CADDET Danish National Team in TŅllŅse.

From Norway

New remote energy supply system opened

A new “total energy supply system” for a remote dwelling in southern Norway was officially opened in October 1999. The project involved modifying the existing 2 kW photovoltaic-diesel hybrid system to a photovoltaic hybrid system using a LPG-fuelled 5 kWe micro CHP unit. This is the first demonstration of this type of CHP in a stand-alone environment. The aim of the project is to find cost-effective and reliable ways of supplying energy to customers in remote locations. In Norway, stand-alone systems can be cost-effective compared to grid connection if the connecting line is more than 2 km long, and Norway’s potential is estimated to be about 1,000 systems. A “total energy supply system” has several advantages:

  • increased lifespan of the LPG-engine (more than 30,000 hours) and reduced maintenance costs;
  • better energy efficiency due to the recovery of waste energy for domestic hot water and space heating during winter;
  • reduced noise and polluting emissions;
  • only one fuel needed for heat and electricity.

For more information contact the Norwegian CADDET National Team in Rud.

From the United Kingdom

Environmental awards for wind energy

In August 1999, B9 Energy (O&M) Ltd became the world’s first wind farm operation and maintenance company to achieve accreditation to the international environmental management standard, ISO 14001, for activities at its headquarters and at the Bessy Bell wind farm in Northern Ireland. The wind farm is owned by PowerGen Renewables, which also received a certificate of accreditation.

In operation since 1995, the wind farm produces enough electricity for about 5,000 homes and receives over 1,000 visitors every year.

For more information contact Sacha Workman or Lucy Ford-Hutchinson, B9 Energy, Tel: +44 28 28 263900, or Chris Morris, PowerGen Renewables Ltd, Tel: +44 24 76 424805.

The CADDET Renewable Energy Newsletter is a quarterly magazine published by the CADDET Centre for Renewable Energy at ETSU, UK.

The articles published in the Newsletter reflect the opinions of the authors. They do not necessarily reflect the official view of CADDET.

Enquiries concerning the Newsletter should be addressed to Pauline Toole, Editor, CADDET Centre for Renewable Energy, ETSU, Harwell, Oxfordshire OX11 0RA, United Kingdom. Tel: +44 1235 432968, Fax: +44 1235 433595.