Managing intermittency while keeping the system reliable can add costs. When renewables supply only a small proportion of the power on a grid this effect is negligible but as the proportion increases the costs can become more significant. For example, estimates suggest that managing intermittency would add about 1p to a unit of wind energy in the UK should wind supply around 30% of electricity. (That's around a tenth of the current retail cost of power.) … [Read more...] about Are solar, wind and marine power too intermittent to be useful?
Maritime electric power outage
He said the report itself clarified that to do so within the provisions of the Share Sale Agreement would require a sum in the region of 2.4 billion dollars (about N736 billion), some of which would be paid as compensation to the investors. … [Read more...] about FG, DisCos committed to tackling challenges of retail electricity
But workers in sectors who can now sometimes retire earlier than the official age of 62 don’t want to lose their special privileges. Some power grid workers can retire as young as 57, Jouanno said. Other workers who can retire before their sixties includes Paris Metro and train drivers and Paris Opera workers. … [Read more...] about Changing tack, French strikers turn off power to press govt
Generators that exploit the power of the sea have advantages over wind turbines because the latter exploits a source of energy that is far less predictable than the tides. On the other hand, machines immersed in deep, fast flowing waters are not easily repaired when a fault occurs. “You cannot buy a book that tells you how to anchor a seabed generator to the sea floor in a 7-knot tide,” says Watts. “You have to go and do it yourself and people in Orkney have been doing it for 15 years now. Marine energy is an everyday topic of conversation in Orkney. … [Read more...] about How Orkney leads the way for sustainable energy
Hydrogen is not found in pure form on Earth, however, so it must be produced from other compounds such as natural gas, biomass, alcohols or water. In all cases it takes energy to convert these into pure hydrogen. For that reason, hydrogen is really an energy carrier or storage medium rather than an energy source in itself – and the climate change impact of using it depends on the carbon footprint of the energy used to produce it. … [Read more...] about What’s the ‘hydrogen economy’?