Gw what does 40 40 mean

This could potentially have severe implications for local bird species, which shun wind turbines by several kilometres and thus stand to lose half of the German North Sea as their habitat, NABU said. Benjamin Wehrmann. Wind Policy. Clean Energy Wire. Total area needed for GW offshore wind capacity in German North Sea; red area indicating habitat loss for sea bird species. Source: NABU. Julian Wettengel.

So I am still confused. The first number generally refers to percent chance half-cast time. The second number generally refers to percent chance half-recharge time.

Originally Posted by Roen. Originally Posted by Ailina. Originally Posted by Darcy. Thanks all for your help! Show Printable Version. Email this Page. Linear Mode. Switch to Hybrid Mode. We may also be able to import green power to meet local lulls — balanced by exports at other times, when we have a surplus.

Will all that suffice? The current plan is to switch most heating and transport over to electricity — heat pumps and electric vehicles EVs. That has some issues: the power grid may not be up to it, as power demand would be pushed up at peak times, unless evening EV-charging was delayed.

That does mean green gas plants must be there for occasional extra back-up but arguably it would not require 70 GW. It is usually said that balancing costs will rise significantly as the variable renewable proportion increases. But, against that, some smart grid-balancing measures will reduce system costs by matching energy supply and demand more efficiently. It was suggested that these savings could more than offset the cost of upgrading the power system.

That does seem credible for some of the options. For example, introducing variable time-of-use energy tariff charges requires no capital outlay but could lead to reduced energy use and user costs and reduced system costs. In a scenario with renewables much expanded, demand would not change indeed, hopefully in such a future, it might be reduced.

But, while there would not be a need for more back-up power, there would be a need for more P2G conversion if the surpluses are to be used as hydrogen more widely, so that would push up the cost — although that has to be set against the value of the wider use of P2G energy. Alternatively, some of the surplus could just be exported as power, earning valuable income. In reality, renewables are here now and are getting ever cheaper and, as I have suggested above, the system economics could improve as renewables expand — depending in part on the viability of P2G.

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