From Denmark

Turbine manufacturer plans franchises to boost exports

Norwin A/S, one of the smaller Danish wind turbine manufacturers, is planning to market its products in other countries through a system of franchises centred on local production of its turbines. Most of the visible parts of a wind turbine are based on advanced technology, but production itself does not require technology at this level. The intention is that local partners will buy one turbine and then manufacture other turbines themselves. The franchise “package” will include everything from production drawings and service to the transfer of technology related to turbine production.

The franchise option will be available for Norwin wind turbines sized up to 750 kW. These machines are designed in accordance with the active stall regulation principle. They have the same regulation options as a pitch-regulated turbine, allowing the blades to be angled so that the wind speed maximises the turbine’s efficiency. However, high load and efficiency variations that typically occur with pitch-regulated turbines are avoided on account of the stall features incorporated. Changes in air density will not cause overproduction of electricity; this means fewer stoppages and less wear on gearboxes and generators.

New solar cell programme launched

A new Danish Solar Cell Programme aims to develop, test and demonstrate the use of building-integrated solar cell technology in co-operation with non-profit Housing Associations and Urban Renewal Companies. The programme, which started on 1 January 2000, has up to DKK 30 million (where DKK is the Danish krone) at its disposal over three years. It is managed by the Danish Energy Agency.

Solar cell experts from various Danish institutes, architects and the industry will work together to find new aesthetically convincing design solutions. The projects will be evaluated by the Solar Energy

Centre Denmark and, as far as possible, the results will be accessible to the general public. The programme also includes research on photo electric chemical solar cells.

For more information contact the CADDET Danish National Team in Tølløse.

From the Netherlands

Deventer - Solar Boiler City 1999

Deventer, in the province of Overijssel, has been voted the Netherlands’ Solar Boiler City of the year for 1999. Taking over the title from the city of Haamstede, Deventer will soon see the installation of its one-thousandth solar hot water boiler. For some years, it has promoted the use of solar boilers in existing buildings and on new estates. Deventer also participates in utility campaigns and in the nationwide actions of Climate Connected Municipalities. Early in 1999 the city started a programme to install 500 solar boilers during 1999-2000. The Solar Boiler City contest was organised by a Dutch radio show and attracted thousands of votes. To win, Deventer overcame the challenge of Sittard and Eindhoven, which were the other two nominations put forward by a professional jury.

New tests on energy from roads

In mid-1998, the Netherlands’ Department of Public Works started tests on extracting energy from roads (see the article in Newsletter Issue 3/99 Can solar energy contribute to road safety?) In the tests, a piping system through the asphalt extracted energy from the sun-heated surface. Now, the Dutch consultancy Kema has considerably improved this concept. In the latest tests, instead of transporting water through pipes in the road, the water is fed directly through a layer of very low density asphalt (ZOAB). Two layers of asphalt seal the layer of ZOAB on the top and bottom. If successful, this technology could significantly reduce the cost of recovering solar heat from road surfaces.

A new test site has been built and, during the next two years, Kema will carry out a monitoring programme. The two main advantages are that, during summer, the ZOAB withdraws heat from the

surface of the road, so reducing track formation, and in the winter, it prevents the road from freezing. It takes about 15 m2 of asphalt to heat a dwelling; after the initial six months of tests, Kema will start tests on the heating and cooling of offices.

Wind energy expanding in the Netherlands

In 1999, the Netherlands installed an additional 61 wind turbines with a total output of 45 MW. The Rivierduintocht and Groetpolder wind farms shared the biggest growth, with 11.5 MW each. In total, there are now 1,258 wind turbines in the Netherlands with a total capacity of 409 MW. These generated 645 GWh of electricity in 1999 and the average power per turbine has increased from 640 to 700 kW. The leading manufacturer is NEG Micon, with a market share of 240 MW, and second is Lagerwey The Windmaster with 103 MW.

For more information contact the CADDET Dutch National Team in Sittard.

From the USA

Homeowner installs record-setting solar energy system

The largest residential installation in the USA to be registered with DOE’s Million Solar Roofs Programme has been installed by a family at their home in Morrison, Colorado. The 12 kW system will provide most of the electricity for the 557 m2 dwelling. The family will also be able to sell excess power back to the electricity utility, the Public Service Company of Colorado (PSCo) – an approach known as “net metering”. PSCo is partnering with Altair Energy to install home PV systems through a programme called Solarsource. For more information, see the Altair Energy press release on the Web at:

For more information about DOE’s Million Solar Roofs Programme, see the Web site at:

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.