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Search: Posts Made By: petit plateau
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8th Aug 2022, 15:11
Replies: 7,850
Views: 5,396,095
Posted By petit plateau

- Some were trying to safeguard businesses, land,...

- Some were trying to safeguard businesses, land, property they had;
- Some were too poor or too frightened to move away, especially if they had nowhere or no-one to go to;
- Some were genuinely...
Forum: Jet Blast
31st Jul 2022, 17:50
Replies: 3,608
Views: 1,342,093
Posted By petit plateau

Hardly. Russia has unilaterally suspended and/or...

Hardly. Russia has unilaterally suspended and/or reduced gas flows to a number of EU countries. Russia has also unilaterally imposed currency payment requirements that were specifically excluded from...
20th Jul 2022, 09:19
Replies: 57
Views: 7,488
Posted By petit plateau

This applies to any serious industry where...

This applies to any serious industry where travelling crews are involved.

If you go to any major industrial site (power station, paper mill, steel mill, auto plant, railway, etc) during a intense...
Forum: Jet Blast
18th Jul 2022, 11:06
Replies: 33
Views: 4,433
Posted By petit plateau

Silver Reflective Window Film (Solar Control &...

Silver Reflective Window Film (Solar Control & Privacy Tint - One Way Mirror/Mirrored Glass)

https://www.amazon.co.uk/Silver-Reflective-Film-Control-Privacy/dp/B00GC9AKR6
Forum: Jet Blast
16th Jul 2022, 18:59
Replies: 62
Views: 2,188
Posted By petit plateau

(Thank you Mods for shunting this across, from...

(Thank you Mods for shunting this across, from out of the Ukraine thread, where I too thought it was a distraction)

If it interests anyone, here is an article about battery systems helping to...
Forum: Jet Blast
16th Jul 2022, 10:05
Replies: 62
Views: 2,188
Posted By petit plateau

There are many different lithium chemistries....

There are many different lithium chemistries. Until quite recently it was only possible to get sufficient performance out of the various NMC chemistries, and these have cyclic lifetimes due to the...
Forum: Jet Blast
15th Jul 2022, 22:21
Replies: 62
Views: 2,188
Posted By petit plateau

I think you folks are comparing apples with...

I think you folks are comparing apples with potatoes judging by the unit confusion.

The Hinckley Point C 2 x 1630 MW = 3.2 GW reactors are on course for GBP 23 billion in cost, say USD 27 billon,...
Forum: Jet Blast
13th Jul 2022, 11:08
Replies: 46
Views: 3,862
Posted By petit plateau

Well clearly other northern European nations have...

Well clearly other northern European nations have better winter weather than the UK .............as "Heat pump sales grew 34% in Europe in 2021 : The heat pump markets with the highest growth in...
Forum: Jet Blast
11th Jul 2022, 14:11
Replies: 46
Views: 3,862
Posted By petit plateau

Just use the normal spray-on oven cleaner foam....

Just use the normal spray-on oven cleaner foam. Let it sit (drip) for ten minutes then wipe with paper towel. No elbow grease required.



The GF's house had two 12kW Jotuls in when she bought...
Forum: Jet Blast
11th Jul 2022, 09:31
Replies: 136
Views: 13,570
Posted By petit plateau

You are absolutely right, thank you. It is indeed...

You are absolutely right, thank you. It is indeed an exhaust air heat pump drawing from an in-house air ducting system, and supplying heat via a fairly normal wet loop of either radiators and/or...
Forum: Jet Blast
9th Jul 2022, 17:10
Replies: 136
Views: 13,570
Posted By petit plateau

Then in this case it seems to me the more...

Then in this case it seems to me the more expensive company is giving you the better advice. Whether it is two different inverters or one inverter that can run two fully independent strings will be a...
Forum: Jet Blast
8th Jul 2022, 22:27
Replies: 136
Views: 13,570
Posted By petit plateau

From what you say these appear to be panels...

From what you say these appear to be panels without DCDC optimiser modules. So just simple ordinary strings.

Therefore if the two roof sections have different orientations then technically it will...
Forum: Jet Blast
8th Jul 2022, 13:51
Replies: 814
Views: 28,890
Posted By petit plateau

Where I used to live in a small village in France...

Where I used to live in a small village in France the list of names on the war memorial was longer than the list of names on the corresponding war memorial in the county town in England where I now...
Forum: Jet Blast
8th Jul 2022, 08:45
Replies: 136
Views: 13,570
Posted By petit plateau

Additionally as the grid voltage rises, so too...

Additionally as the grid voltage rises, so too does grid frequency (because the fossil-driven generators are running under droop speed control). All modern (since about 10 years ago) grid-connected...
Forum: Jet Blast
7th Jul 2022, 08:54
Replies: 136
Views: 13,570
Posted By petit plateau

Thanks Mike, most helpful. On a different...

Thanks Mike, most helpful.

On a different point, it seems solar PV module manufacturers are now offering 40-year warranties. Quite how reliable the claims experience might be boggles my mind, but...
Forum: Jet Blast
7th Jul 2022, 08:18
Replies: 136
Views: 13,570
Posted By petit plateau

Yes, I know that modern CCGT's are >45%...

Yes, I know that modern CCGT's are >45% efficient, however I picked 33% for explanatory purposes as it both makes the illustrative numbers easy, and not all generating units are of the CCGT type.
...
Forum: Jet Blast
6th Jul 2022, 21:11
Replies: 136
Views: 13,570
Posted By petit plateau

Keeping the numbers simple for people like me. ...

Keeping the numbers simple for people like me.

Your gas boiler is approximately 33% efficient. Two thirds of the energy from burning the gas (6kWh) goes up the chimney, leaving one third (3kWh) to...
Forum: Jet Blast
6th Jul 2022, 15:54
Replies: 136
Views: 13,570
Posted By petit plateau

I am pretty sure you have a plain vanilla Air...

I am pretty sure you have a plain vanilla Air Source Heat Pump (ASHP) just the same as the one at my GF's. That is external air. It has to be external air as the air that goes in one side at ambient...
Forum: Jet Blast
6th Jul 2022, 11:15
Replies: 136
Views: 13,570
Posted By petit plateau

I live in a row of basical identical Victorian...

I live in a row of basical identical Victorian terraced housing, all built in one run in approx 1900, which happen to be almost exactly the definition of the average UK house in price, energy use,...
Forum: Jet Blast
5th Jul 2022, 16:30
Replies: 136
Views: 13,570
Posted By petit plateau

For mass-sensitive application perhaps, though I...

For mass-sensitive application perhaps, though I suspect the other synthetic liquids will win for aviation in this respect (they are volumetrically better, and an easier drop-in replacement). For...
Forum: Jet Blast
4th Jul 2022, 21:25
Replies: 136
Views: 13,570
Posted By petit plateau

FWIW I have yet to find an advantage for me, and...

FWIW I have yet to find an advantage for me, and can see a variety of potential disadvantages, so I continue to refuse. Especially as in the real world one cannot undo the decision.

My own...
Forum: Jet Blast
4th Jul 2022, 12:05
Replies: 136
Views: 13,570
Posted By petit plateau

At this point anyone using this language and...

At this point anyone using this language and promoting those viewpoints might just as well carry a sandwich board saying "friends of Putin". Certainly your statements re China are misleading as the...
Forum: Jet Blast
3rd Jul 2022, 21:47
Replies: 136
Views: 13,570
Posted By petit plateau

For doing practical engineering/economic...

For doing practical engineering/economic calculations 20-25 years is a fair bet at c.90% of initial performance. I used to figure on inverter failures every 5-years but these days every 10-years...
Forum: Jet Blast
3rd Jul 2022, 21:41
Replies: 136
Views: 13,570
Posted By petit plateau

Mother Nature doesn't attend Davos, but she is...

Mother Nature doesn't attend Davos, but she is the one pulling the global levers.

(other university courses are available if you don't like the MIT ones)
Forum: Jet Blast
3rd Jul 2022, 16:17
Replies: 136
Views: 13,570
Posted By petit plateau

20% efficiencies on ~1000W/m2 solar input is...

20% efficiencies on ~1000W/m2 solar input is plenty good enough to get a commercial solution, which is precisely why the UK pricing using UK sunshine yielded the UK economics I quoted in a post...
Forum: Jet Blast
3rd Jul 2022, 16:05
Replies: 136
Views: 13,570
Posted By petit plateau

When you've studied the complex system of climate...

When you've studied the complex system of climate and economics for a bit, do come back and we can have a meaningful discussion in the middle.

To help you along here is one such course. It is...
Forum: Jet Blast
3rd Jul 2022, 15:59
Replies: 136
Views: 13,570
Posted By petit plateau

Us scientists and engineers are clever people,...

Us scientists and engineers are clever people, but we don't do magic. We know exactly how to capture the carbon emissions from the combustion products, that is pretty basic engineering*. However the...
Forum: Jet Blast
2nd Jul 2022, 12:33
Replies: 136
Views: 13,570
Posted By petit plateau

I believe you are not in UK. The missing piece of...

I believe you are not in UK. The missing piece of the puzzle that is needed in order to comment meaningfully is what your import tariff is, vs your export tariff. For example I export (edit :...
26th Jun 2022, 21:03
Replies: 7,850
Views: 5,396,095
Posted By petit plateau

I suggest you read the relevant documents, but it...

I suggest you read the relevant documents, but it seems to me that Lithuania etc are acting in accordance with the relevant agreements. Lithuania is after all a sovereign state, and the relevant...
26th Jun 2022, 17:20
Replies: 7,850
Views: 5,396,095
Posted By petit plateau

Do keep up at the back. They have already...

Do keep up at the back.

They have already been working towards disconnecting Kalingrad's grid from the Baltic states, and the Baltic states from Russia's grid.
...
Forum: Jet Blast
25th Jun 2022, 12:02
Replies: 12,012
Views: 1,166,326
Posted By petit plateau

Well you can blame the Conservatives for that, as...

Well you can blame the Conservatives for that, as Cameron in 2013 decided to "cut out the green crap" in his own words
...
Forum: Jet Blast
19th Jun 2022, 19:27
Replies: 12,012
Views: 1,166,326
Posted By petit plateau

A judgement in a UK court : " the near total...

A judgement in a UK court :

" the near total silence around this case has been one of its most extraordinary aspects. One month before Russia invaded Ukraine, as part of the legal action,...
Forum: Jet Blast
11th Jun 2022, 15:47
Replies: 3,608
Views: 1,342,093
Posted By petit plateau

It is legally impossible to invade ones own...

It is legally impossible to invade ones own country.

Or did Union forces engage in a foreign war when taking on the Confederacy ?
10th Jun 2022, 12:02
Replies: 7,850
Views: 5,396,095
Posted By petit plateau

Both sides learn during conflicts. Russia has...

Both sides learn during conflicts. Russia has changed and dramatically focussed its efforts, such that unless Ukraine focusses its efforts in response (which it has done) then the new Russian tactics...
Forum: Jet Blast
7th Jun 2022, 11:51
Replies: 3,608
Views: 1,342,093
Posted By petit plateau

Clearly someone who has never considered the...

Clearly someone who has never considered the origin of the word "danegeld". Note the spelling is the original Anglo-Saxon under King Ethelred.
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