Though, as I mentioned earlier, there was quite a bit of talking up of the hybrid X-Trail - which was supposedly a good thing to make in Sunderland. We might have expected an even stronger push towards hybrid in the egoist of dieselgate.
Brexit, for once some facts.
- Thread starter flecc
- Start date
Although it's the desirable choice, future is the operative word, we are very many years away from being able to only have renewables.
Meanwhile nuclear is the sensible choice to avoid more climate damage from burning fossil fuels. That has to be minimised.
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Last year until around September was almost windless throughout Europe.
The silly thing about Wind is that no matter how windy it is the power harvested has to be covered by equally powerful back up systems in case the wind does not blow. Thats before we look into the actual nunber of days any farm can be productive on.
Generally speaking even high turbines require a minimum of 13 mph to be trully productive. Accepted that only equates to, generally, around 10 mph at 10m height.
Trouble is windstats tend to give average windspeeds over a particular length of time. That leads us to think it is actually windier than it is..
For example last week in SA we had an average windspeed of 18 kts. (And the Cape is one of windiest spots on earth)
Trouble is during that week we had 2 days of around 30 kts and to balance things out 2 days with around 8kts.
Windfarms,just like Sailors, Kitesurfers and Windsurfers need to know the number of days per week, month or year where the wind is over the minimum required.
Kitesurfers need 10mph minimum. Windsurfers unfortunately need a minimum of around 14..(to perform as intended)
In reality that equates to Kitesurfers in UK being able to sail on almost double the number of days Windsurfers can. Windfarms need almost same as Windsurfers. Historically over past 35 years I, m lucky if I can windsurf on more than 45 days a year...
To my mind thats about same number farms are really/actually productive.
But as I posted, only if there's the sales to justify making it here.
In that respect the X-Trail hasn't done well. Add to that the fact that Nissan are going to be very late to the hybrid party with none so far, so prospects aren't strong in the face of hybrid experienced competition that is already beating them anyway in this highly competitive compact 4 x 4 sector.
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So does mine, but we are a small minority in Britain. There's nowhere near enough renewable availability for anything but a small part of the population.
It can peak at 25% when all conditions are right, but is often down to under 15%. The problem is that the bulk is wind generated that only happens when the winds are right.
So over 80% of the population can't have only renewables.
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From Pantomime Central AKA the house of Commons
This is VERY IMPORTANT - Watch as@GeraintDaviesMP, a former trade rapporteur for the Council of Europe to the WTO, explains to @theresa_may that what people who voted Leave are being told over WTO terms is yet another pack of LIES from the people who LIED to them over BREXIT.
This is VERY IMPORTANT - Watch as
wind speed increases rapidly with height.
Tall turbines are much more productive for that reason.
The graph below illustrates the gain by increasing the height of your turbine.
This was seen in Bristol
Presented like a tweet, it reads: “We could have two referendums. As it happens, it might make more sense to have the second referendum after the renegotiation is completed.”
A caption by the campaigners reads: “He didn’t tweet it, he actually said it! In the House of Commons. What changed?”
But Mr Rees-Mogg claims the use of the quote is “fundamentally dishonest” and relates to two referendums that would have taken place while the UK was still part of the EU and before any decision to leave, and before the Government decided on the remain/leave vote.
So there you have it to refer to things this chap said in the past is fundamentally dishonest, interesting play on words that, when obviously what he said in the past he now regards as fundamentally dishonest.
The killer line is in his own words "after the renegotiation is completed" which blows his response out of the water
Presented like a tweet, it reads: “We could have two referendums. As it happens, it might make more sense to have the second referendum after the renegotiation is completed.”
A caption by the campaigners reads: “He didn’t tweet it, he actually said it! In the House of Commons. What changed?”
But Mr Rees-Mogg claims the use of the quote is “fundamentally dishonest” and relates to two referendums that would have taken place while the UK was still part of the EU and before any decision to leave, and before the Government decided on the remain/leave vote.
So there you have it to refer to things this chap said in the past is fundamentally dishonest, interesting play on words that, when obviously what he said in the past he now regards as fundamentally dishonest.
The killer line is in his own words "after the renegotiation is completed" which blows his response out of the water
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The Tory constituents think Boris is 'lovely'.....says it all !!!!
KudosDave
Tony.....didnt realise that you were a fellow yachtie!!!!
KudosDave
Don't discount electric cars and home power packs, aka Powerwalls, where storage is concerned. As electric cars are being taken up more rapidly, these will play an important part in energy supply.
1) In Denmark they take advantage of their e-car's batteries by charging at low night rates and selling back their car battery's current on the days they aren't using the car at day rates when the power company needs the supply. It can knock off as much as two pounds a day from their electricity bills.
2) E-car batteries are regarded as spent for car use at 75% capacity left, but they aren't scrapped then. Those from Teslas and Nissan Leafs for example are used in home powerwalls to store off peak current and that from any solar panels. From there it can be use during peaks of home demand or sold back to the utility company.
So is this useful? Yes, very much so:
My home is entirely electric powered, no gas or other energy source, all lighting, cooking, heating etc from electricity.
I average 8 units a 24 hour day in the summer, 28 units a day in the winter, so my Nissan Leaf's 40 kWh battery on one charge could power my home for 5 days in the summer or 1 day in winter peaks. On average over a full year my battery could supply my entire home for two days. My car is last year's, the latest one this year and some rivals are over 60kWh, so 50% more effective for storage. Even when spent and in powerwalls that will have around 45Kwh available.
You can see from these facts how useful a few thousand electric cars and powerwalls could be for large scale grid storage and load spreading. These are the future for storage and they'll be playing a big part as e-cars spread.
Half of all new car registrations in Norway are electric now and they have a ban on new i.c. car registrations from 2025. Some other EU countries from 2030, the UK lagging as usual with a 2040 deadline.
You can see from this a huge expansion in e-cars and powerwalls backing up grids over the next few years.
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I know, I mentioned it in first post. Its called vertical wind shear.wind speed increases rapidly with height.
Tall turbines are much more productive for that reason.
The graph below illustrates the gain by increasing the height of your turbine.
Roughly speaking at 150m you, ll get 1.3x 10m speed. (It varies with region, (trees, buildings etc) temperature and pressure. You must also take into account the slightly thinner air at 150 m, (air density has a massive affect on power in sails/blades)
But 1.3 x feck all is still feck all.
I appreciate you have great knowledge of the theory behind turbines, equally so I have similar experience with the fickle nature of the wind. Look outside. We had 16 kts forecast. There is probably 7...Thats the nature of wind.
Its unpredictable, unreliable, fickle and utterly useless much of time.
All the theory in the world does not alter that. Building an industry with those characteristics involved, without being able to store the product, is ultimately doomed.
Its been a tick box exercise to placate green brigade.
All the money spent on harnessing wind energy should have gone on developing farming tidal current energy. Its absolutely predictable, 100 % reliable, automatically hidden and UK is probably best place in world to utilise tides. Wind was the easy option to placate people. When it doesnt work powers that be will say well its got to be nuclear then..And they, ll have a point.
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Long ago now Dave. As you know boat is spelt w.o.r.k. so I eventually packed it in when I spent more time maintaining than enjoying.
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But when there is no wind, there is no wind and that can be the case to several thousand feet.wind speed increases rapidly with height.
Tall turbines are much more productive for that reason.
The graph below illustrates the gain by increasing the height of your turbine.
No, I simply report the facts as they emerge, no theories involved
Yes, I agree that the mass take up of electric cars will provide a huge storage facility. A great duel purpose item, transport and an energy bank.
100% agree. Harvesting tidal can be very costly, even much more than nuclear power. But it's well worthwhile since it's totally green, utterly reliable and permanent for all time.
Everything else is daft in comparison.
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In 1989 I competed in over 80 races.....yacht Wavetrain....in the end it became an unpaid job.!!!!
Lots of photos on Google images....beautiful boat,cold moulded cedar/mahogany....won lots of races but a nightmare to maintain....upset when I sold it to Ireland.
KudosDave
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