133: A Company Dormitory with a Large Amorphous-silicon PV System

A dormitory for single employees has been built by a Tokyo company as a demonstration Eco-house. The dormitory has a 20 kWp amorphous-silicon PV system with a total panel area of about 485 square metres - one of the largest in Japan. The PV cells are inexpensive and have a good life-cycle energy performance. The large area of PV cells balances their low conversion efficiency. (Printed 2000)

132: Solar Wall Provides Economic Heating and Ventilation

A low-cost, high-performance solar “transpired air” collector saves over USD 4,300 in annual energy costs at a water treatment plant in Colorado. The system provides a cheap source of preheated ventilation air at an altitude of 3,000 m, and is designed for temperatures as low as -29 degrees Celsius. The featured system is housed in a 1,171 square metre metal building, but the technology is suitable for all large commercial buildings. (Printed 2000)

131: Air-conditioning System Exploiting Natural Energy

An Environmental Technology Centre in Shiga, Japan has been designed to use natural energy to reduce its primary energy demand by 20 percent. Passive solar design features, active solar heating technology and the use of natural daylight and ventilation have been combined with a number of energy saving features. The Centre is a showcase for sustainable building techniques. (Printed 2000)

130: Small-scale Hydro within a Municipal Water Supply System

In Boulder, Colorado, five hydroelectric units in the city's municipal water supply system produce enough electricity to provide 7 percent of the electricity consumption of Boulder’s 125,000 residents. Two more installations, currently under construction, will almost treble the city’s hydro capacity. The project demonstrates how small hydroelectric equipment can be applied cost-effectively in municipal water supply systems, wherever a pressure-relief valve is used to reduce excess pressure in supply lines. (Printed 2000)

129: Large-scale PV System on an Older Residential Building

During 1996-97 a large scale PV retrofit project was carried out on Solgaarden, a large, residential block in Kolding, Denmark. In 1998 the PV system produced a total of 76.3 MWh of electricity.  Solgaarden itself used 27 MWh of the PV-generated power; the surplus was sold to the local utility. In a typical year, carbon dioxide savings of 67.5 tonnes are expected. (Printed 2000)


Articles included are

  • PV-powered water quality system in Japan
  • The world’s largest commercially-built wind turbine
  • Pellet power: a multi-purpose bioenergy plant
  • PV goes to school
  • Landfill gas progresses in the Netherlands
  • New wave device developed in Australia
  • Cold/heat storage systems in Flanders
  • PV/CHP stand-alone energy system
  • Limestone quarry becomes a wind farm
Click here to go to the Newsletter


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.


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.


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:


Click on a link below to download the latest .pdf versions of the brochures

122: Advanced Condensers for Geothermal Power

123: Green Electricity from the Combustion of Clean Waste Wood

124: Wind Farm in Zeebrugge Outer Harbour

125: Danish Biogas Plant with Separate Line for Organic Household Waste

126 Glass Roof-integrated PV system at an environmental Centre

127 Combined Solar Systems for Residential Buildings

128 Thermal Mass Integrated into Passive Solar Homes

World Bank Creates Major Funding Vehicle for Renewables

WASHINGTON, DC - An international fund has been created to invest up to US$100 million in renewable energy and energy efficiency projects.

The International Finance Corporation, part of the World Bank, has joined with several private and public sector groups to invest in the Renewable Energy & Energy Efficiency Fund (REEF), the first global private equity fund devoted exclusively to investments in renewable energy and energy efficiency projects. The money will stimulate investment in green technologies in the developing world, and target the "ample opportunities" for investment in grid-connected renewable energy technologies such as small-scale hydroelectric plants, geothermal power plants, biomass and cogeneration facilities and wind farms.


The "Promotion of Renewable Energy Sources in Southeast Asia" (PRESSEA-2) initiative has been developed to collect relevant information on renewable energy in Southeast Asia & Europe, and disseminate this information to companies and individuals with an interest in renewables. PRESSEA will create and maintain a renewable energy information and ideas for the development, promotion and utilisation of renewables in this under-utilised region of the world. This regualarly updated information is now available and can be accessed via the ASEAN homepage: 


Two new reports have been added to the website for on-line download as pdf. Click on a link below to go to the relevant report.
Advanced Thermal Conversion Technologoes for Energy from Solid Waste
Large-scale Solar Purchasing

Last updated 12 September 2000

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