RE: Sleepy at it again25 May 2022 09:11
... cont'd
And let's talk about Sleepy's hydrogen idea. The sheer hypocrisy of him talking about SMR nukes being "on the design board" and years away is nauseating when he talks about hydrogen. Gas turbines to burn hydrogen DO NOT EXIST. They are "on the design board". The best that has been done is a small percentage mixed with natural gas. Hydrogen burns much hotter and has flashback problems due to a faster flame front. One European utility thinks it can deploy a 100% hydrogen turbine before 2030 with the help of Mitsubishi Electric, but the city of Los Angeles thinks theirs will be 2045.
The infrastructure for transporting, handling, and storing hydrogen doesn't exist either. That will require major new expense, on top of the all the brand new grid infrastructure needed for wind.
But let's talk about the efficiencies of burning green hydrogen for energy. State of the art PEM electrolysis is 80% efficient, hydrogen combustion about 60% efficient. That means that storage of electricity from wind via green hydrogen will be less than 50% efficient and that's not including compression losses for gas that has to be transported and stored. Combined cycle gas turbines running on NG, on the other hand, are 64% efficient. Ireland's current NG usage is more than 3 million tonnes of oil equivalent, or about 35,000 GWh. We'll need about 47,000 GWh from wind power to do the same work. Running at a generous 30% capacity factor, that's 18 GW of wind turbines needed just to replace our current gas usage.
But don't forget, we need to replace our coal and distillate oil powered plants as well. We could be looking at 30 GW of wind ON TOP OF the wind power we're already generating. But wait ... that's only to supply current demand. Not only is demand increasing, but Sleepy want's to electrify a million cars in the next 8 years, shifting all of that oil usage to electricity. Oil for transport is current the largest share of primary energy use in Ireland.
Sleepy's aim was to have 30 GW of wind capacity sometime between 2030 and 2040. Even if it was achieved it wouldn't meet our energy needs. And there isn't a snowball's chance in hell of it being achieved anyway given the planning chaos, the unavailability of grid connections, and the general glacial pace of Irish infrastructure projects. And the costs of all of it were eye-watering even BEFORE he started wittering about hydrogen, which will add vast extra costs just to produce the same energy.
The guy is a swivel-eyed lunatic. Somebody needs to demand to see the costed plans for all this, and a sober assessment of its feasibility. At the very best it is crazy expensive and decades away. I presume he realises we are busting our gut to import emergency generators to meet demand NEXT YEAR! This cr@p really makes my blood boil !!!