Electric vehicles are being taken more seriously than ever before. And not just by environmentalists and electrical engineers. Some of the world’s biggest car companies are finally seeing the writing on the wall.Read full article
I've wondered lately what amount of energy could be produced if the resources expended in the three Gorges Dam could have been used to construct a waterfall the coast of China, or any nation? How much energy would be developed? It may exceed the total amount of energy expected from Three Gorges, and most dams on waterways now constructed in China. What a wonderful way to eliminate the horrors now visiting China as a result of the damming of the Yangtze River.Read full article
Power quality has become an important issue for electric power engineering. Nowadays, the distribution electric networks have unbalanced operating regimes, mainly produced by the great number of single-phase loads. Unbalanced line currents produce unbalanced voltage drops on the three phases of the supply system. Consequently, the voltage system within the supply network will become unbalanced.Read full article
Buildings account for 40% of energy consumption in Europe, so their inherent efficiency is very important.
Efficient space heating requires a properly insulated and sealed building, together with a correctly sized heating system. The choice of system is also important; best practice includes gas-fired condensing boilers and ground-water heat pumps.
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The Aptera is the newest two-seat car with high fuel efficiency entering the market – the company is accepting orders for delivery in about one year. The producers claim that it can achieve more than 300 miles to the gallon (or less than 0.78 l/100 km) and a top speed of 150 km/h.
Old habits are hard to break. If you are sceptical about climate change, you may want to cling to that view, but if you prefer to deal with the matter, a habitual approach can be very useful. The repenting recidivist may have an advantage in his mindset! Let us, however, deal with the matters one by one.
The well-known sceptical environmentalist, (as he calls himself,) Bjørn Lomborg, is marketing his new book “Cool it”. He does so in an article with the witty title “Global Warning” in which he repeats his arguments that there are other issues more pressing and important to deal with than the global warming.
As in earlier articles, the stories told are anecdotal and fragmented, and often seem to be taken out of context. It is true that many of us have, in many respects, a better life today than decades ago, but that is certainly not evidence of a continuous development for the betterment of all, worldwide.
Polar bears, too close for comfort
He claims that the polar bear, an oft-used indicator of global warming hazards, is a growing population, and the hunting in Hudson Bay is more dangerous to these animals than global warming. The truth seems to be that the reason for the hunting in Hudson Bay is that polar bears have to retreat and find new habitats when the ice melts. They then come “too close for comfort” to humans in the villages who sometimes have to give an armed response.Read full article
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.Read full article
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.Read full article
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?Read full article