November 20th

How green is clean power?

The problem of additionality

Green electricity sold by utility companies is a peculiar product. It guarantees the origin of your power, just like an ethical investment fund guarantees the origin of your profit, but what is the solid evidence for such a guarantee?

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November 14th

Development of Economical Analysis and Technical Solutions for Efficient Distribution Transformers

A.F. Picanço, C de Salles, M.L.B. Martinez, P.C. Rosa, H.R.P.M. de Oliveira

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November 13th

Ocean power predicted to increase hundredfold in six years

$4 billion investment required

Ocean power is still a minor in the renewable energy sector. It consists mainly of wave power and tidal stream power, and both technologies have only just embarked on their first commercial projects. Today, less than 10 MW of ocean power capacity has been installed.

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November 12th

Techno-economic Analysis of Methods to reduce Damage due to Voltage Dips

A voltage dip is a Power-Quality phenomenon, often caused by short circuits in the electricity grid, in which the supplying voltage decreases during a short period of time (typically <2s). Some process components, such as variable speed drives and computers, are extremely sensitive to such dips, which may result in a complete process outage.

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November 10th

Saving energy in hotels

This Application Note aims at describing the use of energy and the potential energy savings in the hotel sector, on the basis of theory and practical case studies. Hotels and restaurants represent some 9% of total energy consumption in the utility buildings sector. Utility buildings are offices, shops, hotels, restaurants, educational establishments and care institutions.

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November 5th

REEEP / UNIDO Training Package for Sustainable Energy Regulation and Policymarking for Africa

A new training package on “Sustainable Energy Regulation and Policymaking for Africa” is now freely available via the REEEP website. Developed by UNIDO with contributions from a number of organisations, and co-funded by REEEP, it provides an introduction to the key issues relating to the energy market and energy regulation as they affect sustainable energy.

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November 3rd

Ocean grids around Europe

Several European countries have a policy to encourage the development of renewable en-ergy sources. This is identified in e.g. the European green paper Energy strategy for a sus-tainable, competitive and secure energy supply (March 2006). In the transition towards a European sustainable energy system for the future and to reduce the dependency of im-ported primary energy sources such as oil and gas, the development of offshore wind power is an essential element.

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Centralised Reactive Power Compensation

In this guide, you will learn how to determine the maximum and minimum compensator power in order to compensate reactive power in case of harmonic pollution.

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October 30th

Dynamic Current Limitation to Provide Interactive Features of Power-Electronics Interfaced Distributed Generation

By Fainan Hassan and Math Bollen

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October 24th

How efficient are compact fluorescent lamps?

The EU is banning the use of incandescent lamps. Replacing an incandescent bulb by a compact fluorescent lamp (CFL) does indeed save around 75 % of the energy consumed. But how feasible is it to try and replace all existing incandescents by CFLs? Are today’s CFLs up to the job, or are technical improvements still required? And what about the alternatives? Are there any other light sources of equally high-efficiency as CFLs but without the disadvantages?

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