Hello Jean-Pierre!

Monday February 07 2022 12:27, you wrote to me:

In article (Dans l'article) <[email protected]>,
Vincent Coen <[email protected]> wrote (écrivait) :

the summer at mid day it is some where around 3KW per hour

I would be curious to know what represent "3KW per hour" i.e. 3 kelvin•watt per hour.

Power generated by system is at 3 Kw (3 kilo watts = around 13 Amps) - enough for general power consumption such as dish washer or washing machine or tumble dryer but not enough even for a 3Kw kettle let alone for the oven or more than one ring of the hob.

Pre installation I estimated it would be at least 10 years before it would pay for itself and then onwards start to create real savings but I have a feeling that 13 - 15 years is closer to the mark unless the FIT ( Feedback Tariff ) increases a lot from around 0.05 for 50% generated and I feed more than that back to the grid as day (light) general consumption is below 1 Kw.

If I still lived in my bungalow with half acre of land I could put a wind unit at the back of it so as to not be bothered by any noise but one for the home would only be between 1.5 - 3 Kw and that would 'assume' that it was windy enough to generate at full bore - one heck of an assumption with my basic estimate of cost for it of say 3K pounds and I bet it would be higher.

These systems are great you you are young enough to maximise the benefits but around 70 when installed (5 years ago) is unlikely and that also assumes that you will not move house.

If I had got solar power say 10 years earlier the FIT would have been a lot higher but there again the cost of installation would have been more than double. So you cannot really win on this unless you own a electric car with over 70Kw batteries and only use it lightly, another big assumption :)

What's that old saying - there no such thing as a free lunch!

Vincent

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Jean-Pierre Kuypers wrote:

Power generated by system is at 3 Kw [...]
[...] day (light) general consumption is below 1 Kw.

Finally the Kw, is it power or consumption?

it comes into existence when you consume. When you consume electrons flow,
when you don't nothing happens.

For electricity it is calculated Power = V*I
Basics: 1Watt = 1A*1V

For example a vacuum cleaner of 1100Watt (1,1kW) in US (@60Hz) has 110V*10A=1100Watt - It will draw 10A at 110V.
In Europe it will draw 5A at 220V

and this indicated the work that can be done by the force created when the electrons flow through

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On Mon, 07 Feb 2022 15:31:00 +0100, Jean-Pierre Kuypers wrote:

In article (Dans l'article) <[email protected]>,
Vincent Coen <[email protected]> wrote (écrivait) :

Power generated by system is at 3 Kw [...]
[...] day (light) general consumption is below 1 Kw.

Finally the Kw, is it power or consumption?

Some years back a fellow glider pilot who, professionally, specialises in designing energy-efficient buildings, told me that the average UK home
uses 400 watts of electrical energy, averaged over a 24 period.

So, of course I checked my house to find it averages 300 watts. I don't
have a TV or any other heavy electric energy user other than an electric
oven and a kettle: all heating, including most cooking, is done on gas
rings.

These days I track electricity and gas prices and consumption on a
spreadsheet: quite an illuminating exercse.

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In article (Dans l'article) <strc7g$o83$[email protected]>, Martin
Gregorie <[email protected]d> wrote (écrivait) :

Some years back a fellow glider pilot who, professionally, specialises in designing energy-efficient buildings, told me that the average UK home
uses 400 watts of electrical energy, averaged over a 24 period.

I venture to think that in fact it consumes rather 400 watts•hour (Wh).

--
Jean-Pierre Kuypers

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In article (Dans l'article) <[email protected]>,
Vincent Coen <[email protected]> wrote
(écrivait) :

Power generated by system is at 3 Kw [...]
[...] day (light) general consumption is below 1 Kw.

Finally the Kw, is it power or consumption?

--
Jean-Pierre Kuypers

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On Mon, 07 Feb 2022 16:11:02 +0100, Jean-Pierre Kuypers wrote:

In article (Dans l'article) <strc7g$o83$[email protected]>, Martin
Gregorie <[email protected]d> wrote (écrivait) :

Some years back a fellow glider pilot who, professionally, specialises
in designing energy-efficient buildings, told me that the average UK
home uses 400 watts of electrical energy, averaged over a 24 period.

I venture to think that in fact it consumes rather 400 watts•hour (Wh).

You can put it that way if that's what you prefer.

What I meant was that the power draw averages to a continuous 400 watts
for some sort of homogenous blend of the UK housing stock.

It doesn't much matter whether its averaged over a year, month , week or
day, except that the yearly average is a better figure to quote since
monthly averages will vary during a year and measurements averaged over progressively shorter time periods will be increasingly affected by
weather.

The spreadsheet I use does in fact calculate average electric energy consumption over a year by totalling monthly usage and generates a daily consumption figure by dividing accumulated consumption by the days since
the start of the year.

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On 07/02/2022 15:11, Jean-Pierre Kuypers wrote:

In article (Dans l'article) <strc7g$o83$[email protected]>, Martin
Gregorie <[email protected]d> wrote (écrivait) :

Some years back a fellow glider pilot who, professionally, specialises in
designing energy-efficient buildings, told me that the average UK home
uses 400 watts of electrical energy, averaged over a 24 period.

I venture to think that in fact it consumes rather 400 watts•hour (Wh).

I venture to think it doesn't. 400 watts continuous seems about right to me

I am nearer 1kW continuous...


--
Any fool can believe in principles - and most of them do!

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On Mon, 07 Feb 2022 16:11:02 +0100
Jean-Pierre Kuypers <[email protected]d> wrote:

In article (Dans l'article) <strc7g$o83$[email protected]>, Martin
Gregorie <[email protected]d> wrote (écrivait) :

Some years back a fellow glider pilot who, professionally, specialises
in designing energy-efficient buildings, told me that the average UK
home uses 400 watts of electrical energy, averaged over a 24 period.

I venture to think that in fact it consumes rather 400 watts•hour (Wh).

Stating the average consumption as 400 watts is precisely correct terminology, the total energy consumption would be 24h*400W or 9600 watt
hours which seems about right - my own house consumes rather more as
there's a powered sewage processor and active ventillation as well as all electric cooking.

--
Steve O'Hara-Smith
Odds and Ends at http://www.sohara.org/

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On 07/02/2022 16:32, Ahem A Rivet's Shot wrote:

On Mon, 07 Feb 2022 16:11:02 +0100
Jean-Pierre Kuypers <[email protected]d> wrote:

In article (Dans l'article) <strc7g$o83$[email protected]>, Martin
Gregorie <[email protected]d> wrote (écrivait) :

Some years back a fellow glider pilot who, professionally, specialises
in designing energy-efficient buildings, told me that the average UK
home uses 400 watts of electrical energy, averaged over a 24 period.

I venture to think that in fact it consumes rather 400 watts•hour (Wh).

Stating the average consumption as 400 watts is precisely correct terminology, the total energy consumption would be 24h*400W or 9600 watt hours which seems about right - my own house consumes rather more as
there's a powered sewage processor and active ventillation as well as all electric cooking.

+1. I am even worse.
Lots of electrical stuff in use 24x7


--
It is the folly of too many to mistake the echo of a London coffee-house
for the voice of the kingdom.

Jonathan Swift

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Hello Jean-Pierre!

Monday February 07 2022 15:31, you wrote to me:

In article (Dans l'article) <[email protected]>,
Vincent Coen <[email protected]> wrote (écrivait) :

Power generated by system is at 3 Kw [...]
[...] day (light) general consumption is below 1 Kw.

Finally the Kw, is it power or consumption?

Depends on where used but for my message it's power generated or used.
It is immaterial regarding the voltage as using power so 240 volts using 3Kw is
the same as 110v the same just means a larger amount of Amps.



Vincent

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