Some good points there.
Yes i always think its kind of the EU tax payers to subsidise our imported leccy. Although the UK person just thinks our leccy is expensive.
Your right about the gas but something has to change as its something like 84% of the time the gas production is setting the price wheras in Europe its well less than 50%. Sometime soon we will be down to say 10% gas leccy but still setting the price -madness.
Rolls Royce SMR
Re: Rolls Royce SMR
I think there’s about 8MW of tidal stream turbines operating in UK waters.Ken wrote: ↑Fri Jun 13, 2025 11:44 am Tidal could certainly be one of the eggs in my basket but we cannot compare tidal with nuclear it is an order of magnitude different. Rance - Installed capacity, 240 MW · Capacity factor, 24%. Annual generation, 500 GWh. 500GWh will be little more than than 20 days of HPC production and remember Rance is in one of the best positions in the world with its very large tidal range, twice the UK. As you know they have been doing tidal research in Orkney Islands for yrs and still not able to demonstrate a economic proposition. The tidal flow turbine in N Ireland could not stand the enviroment, fast flowing water with sand and grit etc in is only trouble.
I believe there are plans for about 100MW by 2030
Tesla Model 3 Performance
Oversees an 11kWp solar array at work
Oversees an 11kWp solar array at work
Re: Rolls Royce SMR
Got me pondering the Swansea scheme power, as that's one of the smallest and maybe more a proof of concept, as the larger lagoons improve on economics since the volume of water/energy increases disproportionately. [If you double the circumference of a circle, you quadruple its area, and that principle will apply to building larger lagoon walls.]
Swansea is expected to be 320MW, and generate 14hrs per day. That's 3.5hrs generation and 2.5hrs between, times 4.
I assume that the 320MW will be when the lagoon is empty and water outside at max heaight, or vice versa, dropping to zero as the lagoon fills or empties, so an average of 160MW. I also assume that the rating is based on highest tides not an average, not sure.
For the Cardiff scheme the generation figure varies depending on final design, but seems to be roughly 2GW to 3GW, so perhaps 1GW x 14hrs per day?
The 'package' of tidal lagoons seems to have the potential for around 30TWh pa, so similar to one HPC or SCZ, but I'd suggest much nicer to look at.
Swansea is expected to be 320MW, and generate 14hrs per day. That's 3.5hrs generation and 2.5hrs between, times 4.
I assume that the 320MW will be when the lagoon is empty and water outside at max heaight, or vice versa, dropping to zero as the lagoon fills or empties, so an average of 160MW. I also assume that the rating is based on highest tides not an average, not sure.
For the Cardiff scheme the generation figure varies depending on final design, but seems to be roughly 2GW to 3GW, so perhaps 1GW x 14hrs per day?
The 'package' of tidal lagoons seems to have the potential for around 30TWh pa, so similar to one HPC or SCZ, but I'd suggest much nicer to look at.
8.7kWp PV [2.12kWp SSW + 4.61kWp ESE PV + 2.0kWp WNW PV]
Two BEV's.
Two small A2A heatpumps.
20kWh Battery storage.
Two BEV's.
Two small A2A heatpumps.
20kWh Battery storage.
Re: Rolls Royce SMR
And how are they going to stop it silting up ? The historical evidence of silting along the south wales coast is self evident.
On the Rance, the Rance tidal power plant has experienced significant silting of the basin since its construction. The operation of the barrage, which involves maintaining high and low water levels for extended periods, contributes to sediment settling and thus silting. This silting has had ecological impacts, including the disappearance of certain fish species and the transformation of some areas into salt marsh
On the Rance, the Rance tidal power plant has experienced significant silting of the basin since its construction. The operation of the barrage, which involves maintaining high and low water levels for extended periods, contributes to sediment settling and thus silting. This silting has had ecological impacts, including the disappearance of certain fish species and the transformation of some areas into salt marsh
Re: Rolls Royce SMR
Are you suggesting it's a problem that can't be resolved and hasn't been considered?
Give em a call, or send a message and ask them, then post the response for us to see and learn.
Give em a call, or send a message and ask them, then post the response for us to see and learn.
8.7kWp PV [2.12kWp SSW + 4.61kWp ESE PV + 2.0kWp WNW PV]
Two BEV's.
Two small A2A heatpumps.
20kWh Battery storage.
Two BEV's.
Two small A2A heatpumps.
20kWh Battery storage.
Re: Rolls Royce SMR
Silting has always been one of the variables associated with any impounded water course, it’s only recently that we got lazy and referred to it as a problem.
There’s a massive environmental problem all over the world with sediment from riverine estuaries deposited on the sea bed chocking the life out of coastal fish and crustacean hatcheries.
There’s a massive soil erosion issue for farming land and deforested areas that feeds and exacerbates the marine environment problem.
There’s a synergistic solution in part: Give the sediment its true value and make it the resource that it is. With a net worth, the trapping of sediment in lagoons becomes a contributor to a tidal lagoons operations making it worthwhile to harvest the sediment for relocation to farm land, so farmers benefit, the marine environment benefits , the energy producer benefits and the general population benefits.
Anyone who drives past the woodhead reservoirs in summer can see the tens of thousands of tonnes of silt that have built up, dark and rich in peat that’s material that has a use so why label it as a waste and incur waste handling and disposal licence costs from what is actually a really valuable resource.
Tidal lagoons will have a salt burden as they’re in the inter tidal brackish water range but this can be managed to prevent salinisation of the upland soils.
As with most things in life there is only a problem if we are unable or unwilling to take advantage of the potential in a circumstance. Sediment is one of these - it’s not waste it’s a valuable resource recovery it and treat it as such.
Moxi
There’s a massive environmental problem all over the world with sediment from riverine estuaries deposited on the sea bed chocking the life out of coastal fish and crustacean hatcheries.
There’s a massive soil erosion issue for farming land and deforested areas that feeds and exacerbates the marine environment problem.
There’s a synergistic solution in part: Give the sediment its true value and make it the resource that it is. With a net worth, the trapping of sediment in lagoons becomes a contributor to a tidal lagoons operations making it worthwhile to harvest the sediment for relocation to farm land, so farmers benefit, the marine environment benefits , the energy producer benefits and the general population benefits.
Anyone who drives past the woodhead reservoirs in summer can see the tens of thousands of tonnes of silt that have built up, dark and rich in peat that’s material that has a use so why label it as a waste and incur waste handling and disposal licence costs from what is actually a really valuable resource.
Tidal lagoons will have a salt burden as they’re in the inter tidal brackish water range but this can be managed to prevent salinisation of the upland soils.
As with most things in life there is only a problem if we are unable or unwilling to take advantage of the potential in a circumstance. Sediment is one of these - it’s not waste it’s a valuable resource recovery it and treat it as such.
Moxi
Re: Rolls Royce SMR
Not at all. I have e mailed i will let you know if i get an answer.
I start from a position that any tech problem can be resolved but at what cost or other practical considerations.