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Energy infrastructure

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  • Posts: 0 [Deleted User]


    That's an obscene amount to be paying for electricity, no wonder the nuclear option is dying a death globally



  • Registered Users Posts: 3,790 ✭✭✭Apogee


    Two contrasting reports from Irish Times

    Coal generated up to a quarter of Irish electricity demand last month at peak times, possibly boosting the State’s carbon emissions, official figures show.

    Low wind speeds and power plant closures increased the Republic’s reliance on coal to generate electricity, according to State company Gas Networks Ireland (GNI).

    Its figures show that 12 per cent of electricity supplies last month came from burning coal, while the fossil fuel actually accounted for 25 per cent of needs at peak times.

    Solar panels produced nearly 10 per cent of the EU’s electricity during this year’s sunny summer months, a marked increase from just over 6 per cent three years ago, according to data from energy think-tank Ember.

    Eight countries in the 27-nation union, including Germany and Spain, set new solar records in the months of June and July.

    We do seem to be behind the curve in making more use of solar to complement wind in this country.



  • Moderators, Recreation & Hobbies Moderators, Science, Health & Environment Moderators, Technology & Internet Moderators Posts: 91,207 Mod ✭✭✭✭Capt'n Midnight



    China had 99% of the market last year.

    The Germans are reopening the factory in Freiberg and hope to ramp up to 5 GW per year. Panels are getting cheaper all the time so transport costs are starting to matter more and the German panels produce 20% more power per m2 which reduces installation costs. A Turkish 1GW/year plant opened last year. It's inside the EU customs union.

    Total installed nuclear is about 400GW. Prediction is for 200GW of solar to be installed this year and doubling every 2-3 years.


    ABB and Siemens built some of the kit for a 12GW 1.1 million volt 3,284Km HVDC link in China so should be no problem linking the European grid to the Sahara. Norway and the Alps provide a lot of hydro backup too.



  • Registered Users Posts: 20,047 ✭✭✭✭cnocbui



    One reason could be that direct sunshine only occurs in perpetually overcast Ireland for about 14% of the of hours in a year. It's a preposterous energy source in Ireland that is at it's miserable best when it's least needed; being when the weather is at it's miserable worst.

    I've got a great idea, why don't we invest a few hundred million on a Gas fired power station that will be out of commission from mid October through to mid March, and will only produce 20% of it's rated output, on average, over the time it's not out of commission.

    Think my next purchase will be a new hob for the kitchen that won't turn on 85% of the time I need it. Great for those on a diet.

    I am eagerly awaiting the first commercial scale solar installation in Ireland, as I could do with a good laugh. The only reason anyone would build such a thing is as a reliable machine for harvesting subsidies from the Irish taxpayer, much in the same way Elon Musk bought a company called Tesla that exists to harvest government subsidies.



  • Moderators, Recreation & Hobbies Moderators, Science, Health & Environment Moderators, Technology & Internet Moderators Posts: 91,207 Mod ✭✭✭✭Capt'n Midnight


    It was special case, to kick start the UK's new program for six nuclear plants to replace the ones reaching end of life in the next few years. But even for nuclear it was extraordinary.

    Have a look at this from the National Audit Office https://www.nao.org.uk/wp-content/uploads/2017/06/Hinkley-Point-C.pdf tl;dr version it's costed so that private money makes 9% a year nett (compare to government bond rates) with very little risk even though it was an unproven design.



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  • Registered Users Posts: 10,348 ✭✭✭✭tom1ie


    Thanks for that gjim.

    I imagine it can’t be too long before we get an in depth study on this at the moneypoint 1 and 2 sites as I imagine they will take the max amount of energy available to be produced at the worst conditions for generating available (ie high pressure for days no wind etc).

    once we have that info, it should just be a case of building enough generation that allows us to use the excess renewables to be converted to green hydrogen to be converted back to electricity when we have a dearth of wind.

    also the green hydrogen can be used in the NG network and in HGV’s, busses, container ships etc.

    we will also have access to french nuclear power via the interconnectors without having to build our own nuclear plants, which I think in this thread anyway, has been proven to be a bad idea.



  • Registered Users Posts: 9,706 ✭✭✭Birdnuts


    This "wind is cheap" BS is beyond parody at this stage when one looks at energy prices across the EU and US



  • Registered Users Posts: 9,706 ✭✭✭Birdnuts


    How much wind/solar capacity would be added without vast state subsidies, while the risk of black/brown outs continues to rise?? All the PSO money here is now going towards these developers while still having to maintain gas and coal generation. The figures from Germany this year tell u all you need to know about dysfunctional energy policies based on greenwash and developer led energy policies. That and their decision to urgently proceed with Nordstream 2 via the Baltic further highlights these facts. None of this comes as a surprise when you cut threw the BS and actually analyse the economics of the likes of offshore wind

    https://www.manhattan-institute.org/dismal-economics-offshore-wind-energy



  • Posts: 0 [Deleted User]


    I'll give you one thing, offshore right now does not represent great value.

    However with the support of subsidies to get it moving towards scale it will shift the needle in the right direction.

    Onshore wind and solar were both the same and now that they have matured and reached scale, they are miles cheaper than the alternatives.



  • Moderators, Motoring & Transport Moderators, Technology & Internet Moderators Posts: 22,662 Mod ✭✭✭✭bk


    Interestingly the cost of offshore wind is dropping at an incredibly fast rate too, much faster then originally predicted and not too far behind onshore now. The UK has agreed to pay $50/MWh (£40/MWh) for 5.5GW of offshore wind to come online mid 2020’s. That is cheaper then existing gas plants, never mind new build gas plants.



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  • Registered Users Posts: 8,454 ✭✭✭Markcheese


    It's amazing how polarised this debate is , but most of it is anti something -

    Because youre anti something you're espousing an alternative - almost any alternative ...

    And it's funny how statistic (which can be manipulated at the best of times ) , are often blended with media opinion pieces ( from the right think tank, to give the required view point -

    Slava ukraini 🇺🇦



  • Registered Users Posts: 20,047 ✭✭✭✭cnocbui


    You seem to have only looked at the headline, and only half comprehended even that in the second instance. For a start, the IMF report is from 2015. The energy politics landscape has changed markedly in just the last two years, let alone 6, but the most salient point is that the IMF report was probably deeply flawed. Taken from the first paragraph of that Forbes link:

    "be very careful, this report isn't quite what everyone seems to think it is. Not all of what they describe as subsidies is a subsidy in the normal meaning of the word. Nor is everything they do count a subsidy even in their expansive sense to the energy system. And almost all of what they describe is in fact a subsidy to energy consumers, not to energy producers. And finally it's most certainly not all a subsidy to fossil fuels or fossil fuels use. The way they're counting things the renewables industry is also getting a very much larger subsidy than we normally calculate it does."



  • Moderators, Recreation & Hobbies Moderators, Science, Health & Environment Moderators, Technology & Internet Moderators Posts: 91,207 Mod ✭✭✭✭Capt'n Midnight


    Fast breeder reactors also use highly enriched fuel and they've been used in civilian context. Also the few cargo ships and icebreakers that are nuclear powered use SMR's. It's not a technical show stopper, unless you want to sell to certain countries.

    Storing hydrogen generated from renewables in old gas wells sounds like the end of nuclear on the same grid.



  • Registered Users Posts: 20,047 ✭✭✭✭cnocbui


    The life capacity factor for offshore windfarms in the UK is only 40%, so 60% of the time capacity has to be provided by non-renawables, so only cheap 40% of the time.



  • Registered Users Posts: 3,284 ✭✭✭dubhthach


    There are only two commercially operated Breeder reactors in operation today, both in Russia one of which is over 40 years old. Generally one of the major uses of Breeder reactors is the production of Plutonium for Nuclear weapons. Tbh Nuclear icebreakers are semi-military and are owned by the Russian state, so sure technically possible but I wouldn't hold out hope for importing that sorta tech into Irish market 😉



  • Registered Users Posts: 3,284 ✭✭✭dubhthach


    The UK currently has 14GW's of Solar installed, most of it in England. They ceased offering feed in subsidy in 2019, since then about 1GW of non-subsidised Solar has been added to British national grid.

    We could easily handle about 1-2GW of solar in Ireland to add to mix. Would be useful way to offset wind during a lull caused by High Pressure system (such as at the moment). At the moment there about two dozen small solar plants that have gone through planning.



  • Moderators, Recreation & Hobbies Moderators, Science, Health & Environment Moderators, Technology & Internet Moderators Posts: 91,207 Mod ✭✭✭✭Capt'n Midnight


    France and Japan and others tried to get breeders working with little success. Thorium is pretty much the same technology so I'm not optimistic about that cycle.

    And yes a high correlation with military need for plutonium.



  • Moderators, Recreation & Hobbies Moderators, Science, Health & Environment Moderators, Technology & Internet Moderators Posts: 91,207 Mod ✭✭✭✭Capt'n Midnight


    The London Array is a good bit away from Scotland or Wales and there's interconnectors so that 40% doesn't apply nationwide.

    In Northern Ireland as part of a different renewable scam to 'cash for ash' onshore turbines were 'de-rated'.

    "It's a lawful practice called derating - for example taking a 900kW turbine and restricting its output to 250kW to qualify for the most generous band.

    Even with its output restricted, a derated turbine with bigger blades spins at the maximum capacity for longer than a 250kW turbine, earning more money. ... Their architects believed that their clients could double their income in ROCs by doing so."

    By simply installing more wind turbines or solar panels or wave or tidal you bypass capacity factor issues for a lot more of the time. And the problem becomes how to use all that excess energy.



  • Registered Users Posts: 9,706 ✭✭✭Birdnuts


    What happens in winter and at night?? ie. the peak demand times



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  • Registered Users Posts: 9,706 ✭✭✭Birdnuts


    Whats subs do oil, gas or coal get here??(or anywhere else in the EU for that matter).



  • Registered Users Posts: 9,706 ✭✭✭Birdnuts


    Thats not reflected anywhere its being deployed - the most expensive energy prices across the EU are associated with wind energy deployment.



  • Moderators, Motoring & Transport Moderators, Technology & Internet Moderators Posts: 22,662 Mod ✭✭✭✭bk


    Actually 46.9% for 2020. To give you some context for this number, the capacity factor for gas power plants (combined cycle) for 2019 for the UK was just 43%

    This isn't the gotcha you think it is. No power generation is 100%, plants go offline all the time (e.g. the two NG plants at the moment, Moneypoint last year) and backup is needed for all.

    BTW The UK is predicting the capacity factor for offshore wind to increase to 57% by 2030 and 63% by 2040.

    Err... You think night time is peak demand?!!!

    No one is saying we can have 100% solar, but no reason we can't have 10 - 15% solar. People who make comments about what happens at night truly don't understand how energy generation works.

    "Thats not reflected anywhere its being deployed - the most expensive energy prices across the EU are associated with wind energy deployment."

    And what? You think building Nclear reactors at €25 billion a pop and a strike price of £112 / MWh is going to give you cheaper electricity bills?!



  • Registered Users Posts: 13,866 ✭✭✭✭josip


    Ah yes, good old Tim Worstall, fellow of the institute behind Thatcherism and staunch UKIP supporter.



  • Posts: 0 [Deleted User]


    In a total shock to nobody it turns out that nuclear would be pointless for Ireland




  • Registered Users Posts: 20,047 ✭✭✭✭cnocbui


    "Our generators come in what are called 400 megawatt lumps - nuclear comes in 1200 megawatt lumps.

    If you have a bloody massive nuclear generator in Ireland, you’ve got to have three gas stations puttering away and ready to go in case anything goes wrong. It just doesn’t make sense.”

    And here I was suggesting a 440 MW SMR from RR. In a total shock to no one, Irish expert applies Irish logic to the situation to underline just how clear headed and sensible Irish logic is:

    ""When you have a load of wind on the system, having a load of nuclear doesn’t fit - it makes more sense to put in more wires to France and Britain and trade the electricity."

    Two countries which have reasonably reliable and stable supplies of energy due to those nuclear reactors he was trashing in the previous paragraph.



  • Moderators, Recreation & Hobbies Moderators, Science, Health & Environment Moderators, Technology & Internet Moderators Posts: 91,207 Mod ✭✭✭✭Capt'n Midnight


    I would argue that nuclear is unstable.

    Because when if it goes off line for a few hours, it has to say offline for days.

    And because it can go offline with no notice, for extended periods, or forever. Because of jellyfish or politics, or fracking or climate change (floods, sea walls, rivers frozen or too hot) or all too frequent transformer issues.


    We've seen construction issues with EDF's EPR's so it's safe to assume the nuclear industry is still as unprofessional as ever. There hasn't been a sea change, this time it won't be any different, but the decision makers will be safely retired by the time is proven.

    440MW isn't hugely more than the Silvermines pumped storage system. I don't know the storage capacity though.

    Ireland's guaranteed base load is just 25% of the 2.5 GW summer night valley during the 75% Non-Synchronous-Generation trial period. Which means a little over 600MW synchronous generation and that includes one high inertia generator on in Northern Ireland and five in the South for dynamic stability and voltage control. An SMR could only be one of those six.

    Eirgrid Operation Constraints - https://www.eirgridgroup.com/site-files/library/EirGrid/OperationalConstraintsUpdate_29-April_2021.pdf



  • Registered Users Posts: 9,706 ✭✭✭Birdnuts


    You clearly don't understand the difference between a dispatcheable and non-dispatcheable energy source. You also don't understand that many cycle gas plants are now installed to balance the system due to the variability of wind energy which means they are powered up and down on a frequent basis which obviously affects there output efficiancy. I also think you'll find peak demand periods occur during the hours of darkness on winter evenings.


    PS: The capacity factor for wind so far this year has been grim across Western Europe as highlighted in an earlier link I posted. You will also find that we will need an awfull lot more gas plants if we are to continue to build more windfarms.

    Post edited by Birdnuts on


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  • Registered Users Posts: 9,706 ✭✭✭Birdnuts


    Its quiet hilarious a supporter of wind energy at any cost slagging off nuclear for being "unreliable". In the real world I think you find the likes of the French Grid to be very reliable and low carbon. Compare that to the German grid where the government despite a vast spend on wind energy is now desperate to secure more gas supplies from Russia via Nordstream 2



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