From Denmark
WAsP - a powerful tool for wind climate estimation, data analysis and siting of wind turbines
It is just as important to find a good site for a wind turbine as it is to design an efficient turbine. Electricity is only produced if there is a good wind exactly where the wind turbine is situated. For many years the Research Centre Risø in Denmark has been developing a methodology which makes it possible accurately to calculate the energy production from a wind turbine at an exact location. This work is now commercially available in a PC-program called WASP (Wind Atlas Analysis and Application Programme). The software was developed by the same people who produced the Danish Wind Atlas and the European Wind Atlas. WASP is a key tool for everybody working with wind energy. It constitutes a complete analysis and application package. Wind data can be transformed into regional wind atlases and it allows the user to specify any number of complications e.g. terrain differences and sheltering obstacles around the site considered. The program also takes into account the effect of different surface roughness conditions around the site and a three-dimensional flow model is capable of handling flow over hills and moderately complex terrain. WASP calculates the mean wind speed and the expected mean power production for any wind turbine at any location.

Waste water treatment sludge for soil remediation
For the past 25 years some of the largest companies in the Danish town Kalundborg and five local municipalities have been developing an 'Industrial Symbiosis' concept for industrial growth on environmental terms. The idea is to use waste products from one company as a resource in another. In Kalundborg, the network is a cooperation between the five local municipalities and four industrial enterprises: the Asnæs Power station; the plasterboard manufacturer GYPROC; the pharmaceutical and biotechnology company Novo Nordisk; and the STATOIL refinery. The exchange of waste products is based on solid financial thinking, and is an example of an environmental initiative based on commercial principles resulting in a reduction of both resource consumption and environmental impact. In November 1998, the Industrial Symbiosis network was extended with a fifth company, Bioteknisk Jordrens, which receives and remedies soil contaminated with oil or chemicals. In the future, the municipality of Kalundborg will deliver two lorry loads of waste water treatment sludge per week to Bioteknisk Jordrens. The sludge is utilised as a nutrient for the micro-organisms in the bio-remediation process.

For more information on these two items contact the CADDET Danish National Team in Tølløse.

From the United Kingdom
UK firm wins landfill gas contract in Spain
Combined Landfill Projects Limited (CLP) the biggest independent landfill gas developer in Britain has taken its expertise to continental Europe by securing its first deal in Spain. This project, based at Conica-Montemarta landfill site near Seville allows CLP to design, finance, install, operate and maintain the site and has the potential to be one of the largest schemes in the country. In an agreement with Abonos Organicos Sevilla SA, owners and operators of the landfill and recycling facility at Conica-Montemarta, CLP will have exclusive rights to generate over 4 MW of electricity. Phase one of the project, which will be implemented during 1999, will generate 2 MW of electricity; up to 900 kW of which will be used in the waste recycling plant. The balance of the electric ity produced will be sold to the local electricity distribution system, providing enough power for up to 6,000 homes. Phases two and three will add a further 2 MW of capacity, thus doubling the output of the project and enabling up to 12,000 Spanish households to benefit from renewable energy.

For more information contact: Combined Landfill Projects Limited, 20­22 Queen Street, Mayfair, London, W1 7PJ, United Kingdom. Tel: +44 171 629 2668; e-mail:

From the Netherlands
50,000 PV-systems for South Africa
The Dutch firm Shell International Renewables Ltd and Eskom, the South African electricity utility, have concluded an agreement to furnish PV-systems to households in South-Africa. The solar systems will be available for the 50,000 households which will not be connected to South Africa's fast-growing electricity grid within the next three years. Shell Solar and Conlog designed the system which consists of a PV-module, a battery and a safety and monitoring unit. In addition to an entry fee of $25 to join the scheme, the users pay per month $7.50 for a magnetic card, sold in local shops which allows the system to operate for thirty days. The magnetic card costs less than the monthly cost of candles and paraffin and helps to safeguard the system from misuse.

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

From Sweden
Testing and certification of solar collectors and heat stores
To strengthen consumer confidence in the new technology of solar heating, a certification system for solar collectors has been initiated in co-operation between SP (the Swedish National Testing and Research Institute) and manufacturers. Through this so-called 'P-marking', the product's properties are presented in a uniform and impartial manner and the consumer is assured that a minimum level of quality is reached for the approved product. A similar system has recently been developed for the certification of pellet burners, a rapidly growing market in Sweden. Today, there are 15 certified solar collectors on the Swedish market. The requirements for certification relate to thermal performance, reliability, durability and material quality. An important part of the certification system is the manufacturer's responsibility for continuous quality control, supervised through random visits by SP to factories and building sites. Another product coming into focus, as both solar and biomass applications become more frequent, is the heat store. An efficient heat store is a prerequisite for high-energy savings in a solar heated system. In a wood fired system, the store is mainly introduced to lower emissions and to improve safety and comfort. Experiences from a series of complete storage system tests at SP is now being further developed into methods that could form the basis for a new product certification for heat stores. Some of this work will also form part of the recently started IEA Task 26 'Solar combisystems'.

For more information contact Peter Kovács at the Swedish National Testing and Research Institute. Tel: +46 33 16 56 62; Fax: +44 33 13 19 79;

From the United States
Solar Sisters
Solar Sisters is a programme run by the Himalayan Light Foundation (HLF) in Nepal whose aim is to use renewable energy technologies to benefit community development. Solar Sisters install subsidised solar electric systems in remote homes and in community buildings which cater particularly for women's education and their improved livelihoods. By providing affordable, environmentally-sound electricity, the programme seeks to improve the indoor air quality of village buildings, increase the income of village businesses and improve opportunities for adult education by lighting work areas and classrooms in the evenings. The programme also promotes cross-cultural exchange by providing opportunities for western volunteers to learn about installing solar electric installations in developing countries while seeing Nepal from more than a tourist perspective. The Solar Sisters are volunteers from various parts of the 'developed' world who wish to contribute in a practical way to the people of Nepal, whilst learning new skills themselves. Each participant subsidises one solar electric system and joins a group of 8­14 others in Nepal to learn how to install the systems in an intensive 2-day training course. The group then divides into pairs to install solar electric systems in villages.

For more information contact Stephanie Davis, Himalayan Light Foundation, PO Box 8975 EPC: 5493, Kathmandu, Nepal. email:

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.