October 5th

Distribution panel in a modern Italian hotel room

How much energy does it cost to save energy? In this 4-star hotel each room is equipped with a distribution panel including an RCD (very good for electrical and fire safety) and a transformer 2*12V, rated no less than 24VA. Obviously the transformer supplies the door chime, some electronic control gear e. g. for the air conditioner, the electro-magnetic lock and the auto-shut-off: When the key card is removed the room lighting is switched off automatically in 2 groups with different time lags.

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October 4th

The impact of GHG emission reduction projects connected to the grid

How much will GHG emissions of the complete system be reduced by implementing the project?

How do you calculate the final GHG emission reductions resulting from an energy efficiency or renewable energy project? One of the complexities of this task is that the applications are in most cases connected to the grid. As a result, not only the local effects need to be calculated, but also the effect on the entire grid including all of its power plants.

A joint project of the World Resources Institute (WRI) and the World Business Council for Sustainable Development (WBCSD) has drawn up some excellent guidelines for executing this challenging task. The Guidelines, while designed to be used by governments and business leaders, are also interesting reading for anyone eager to gain more insight into the electricity grid as a system with all its intricate interactions and decision factors.

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October 3rd

Lighting Design & Techniques - Completing the series

By Anne Rialhe, AERE & Pascal Lenormand, Incub

Part 1 - Lighting & Human Life

This is the first article in a series of three in which we will focus on the relationship between lighting and human life. This topic is much broader than merely ‘ensuring vision’. After defining some important terms and measurement units, we will discuss how the quality of lighting interacts with and effects human behaviour.

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October 2nd

10 quiz questions on energy

Take Leonardo's new energy quiz, contributed by Josep Joan Berenguer from Spain.

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October 1st

Is the Bush moving?

You may remember the play by Shakespeare and how the witches tell Macbeth that he will remain in power until the forest moves? He finds this prophecy very reassuring for his future, until he eventually discovers that it is true when Macduff's troops move, camouflaged with branches from cut the trees. Are we now witnessing the end of the climate sceptics when even "the Bush" seems to move?

A coalition of the un-willing?

Last week, George Bush called a climate summit in Washington composed of some of the countries that emit the most greenhouse gases in the world. Some of them have not signed the Kyoto-protocol - a sort of coalition for the unwilling, so to say.

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