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robsmith
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Message 109337 - Posted: 18 Jul 2022, 16:40:31 UTC - in response to Message 109335.  

I did understand, and just used a very simple fact to show how little power you are really using.
Who ever specified your kit either got their calculations very wrong, or you were too cheapskate to buy what you were told, resulting in a way under specified system.
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Message 109341 - Posted: 18 Jul 2022, 18:42:56 UTC - in response to Message 109339.  

Quite simple - you brought up air conditioning and asked a very non-specific question, and got an answer to compare your use with something I know a lot about.

Anyway, I really hope your £430 unit dumps the extracted heat out of the your house as I've seen far to many of those small units that just dump the heat somewhere else in the room/building with obvious results.....
Decent HVAC units are sadly far from cheap, and it's probably not worth spending even £430 on a unit for the few days when they may be needed.
(Totally unlike my place in LA where spending money on a whole house heating system was stupid for those few days when it was cool, never mind proper cold, but the whole house HVAC system was all but essential from March to October/November.)
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Message 109342 - Posted: 18 Jul 2022, 18:53:13 UTC - in response to Message 109340.  

24kW - your supply is undersized, or you don't need an HVAC system that big.

I've seen many rules of thumb to size HVAC systems for houses, but they are all based on rather strange assumptions. If you were to be seriously thinking about a system (see previous post) then you would have to make sure that the specifier understood that you had five or six kilo watts of heat being added by your computers, that is unless they are in a separate building to the house (detached garage or shed) so they size everything correctly. As a very rough guide expect to see a UK domestic whole house HVAC system being something in the region of 5 to 10kW, maybe a bit less cooling and a bit more heating in the frozen north.
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Message 109343 - Posted: 18 Jul 2022, 19:18:48 UTC - in response to Message 109330.  
Last modified: 18 Jul 2022, 19:23:21 UTC

It's 33.3C on my balcony - in the shade.

Here in my neck of the Fort Worth TX metro area it's only 109°F / 42.77°C in the SHADE at 14:15 in the afternoon. Expected high today 111 or 112F and about the same for tomorrow according to weather guessers.

Have my PC'S shutdown and air conditioning on 80F.

Lol, The Texas energy provider this morning asked begged all EV vehicle owners NOT TO CHARGE OR TOP OFF FOR THE NEXT DAY OR SO.

Edit to add a link to a nearby local "personal" weather Station.
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Profile Jord
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Message 109345 - Posted: 18 Jul 2022, 19:30:32 UTC - in response to Message 109342.  

If you were to be seriously thinking about a system (see previous post) then you would have to make sure that the specifier understood that you had five or six kilo watts of heat being added by your computers, that is unless they are in a separate building to the house (detached garage or shed) so they size everything correctly.
Or put the computers in growth tents and have them dump their heat via insulated pipes outside the building. An example with 1 computer is done here: https://www.youtube.com/watch?v=T1ZnAwUg9CU
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Message 109348 - Posted: 18 Jul 2022, 19:36:09 UTC - in response to Message 109344.  

No, I mentioned how much power I was using in my house, that includes AC, lighting, computers, TV, everything. I never suggested that power consumption was AC.
In that post you said:
I don't have a thermometer outside, but the garage is 37C, that's with the side door and two windows open, and two powerful fans blowing into it. Ok, there are 6 computers running in there...[1]

[1] Is 28.7A at 246V quite a lot for continuous power draw?
So, not house, not AC, but garage. And computers plus fans only then.
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Message 109351 - Posted: 18 Jul 2022, 20:17:30 UTC - in response to Message 109347.  
Last modified: 18 Jul 2022, 20:19:29 UTC

Then the Texas energy provider isn't fit for purpose. Have they not heard of supply and demand. They need to crank up the price (at certain times of day if necessary) and spend that on more power stations.

Blame the "GREENIES" that have eliminated a good portion of our Coal & Natural Gas powered generation. Instead Generating reserves now have been replaced with UNRELIABLE Solar & Wind. Then there's a virtual prohibited new generation unless it's "green" energy by the Biden administration.

ERCOT (Electric Reliability Council Of Texas) real time energy dashboard.
Edit to add not going further into this here, that's for a different topic on this board.
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Message 109353 - Posted: 18 Jul 2022, 20:23:53 UTC - in response to Message 109351.  

ERCOT (Electric Reliability Council Of Texas) real time energy dashboard.

It's a shame such a potentially useful resource is blocked by "security rules".
Unlike the UK & French (and probably a whole lot more countries) who have made such information open to the public.
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Message 109357 - Posted: 18 Jul 2022, 21:16:53 UTC - in response to Message 109352.  

You had a great leader with Trump, why did you vote in that idiot?

Don't blame this household.
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Profile Gary Charpentier
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Message 109360 - Posted: 19 Jul 2022, 4:27:57 UTC - in response to Message 109341.  

(Totally unlike my place in LA where spending money on a whole house heating system was stupid for those few days when it was cool, never mind proper cold, but the whole house HVAC system was all but essential from March to October/November.)

LA in San Pedro or LA in the Valley. San Pedro has the Pacific to moderate the climate. With months at a time of highs in the 40's and peaks in the 50's A/C is necessary for life to be sustained. As I write now at 21:15 local it is 26 with humidity in the 70's. With the building walls absorbing sun all day and near zero cooling at night a house without A/C is about the same as inside a vegetable steamer. However LA is mild in that way compared in Washington DC.

Now you must remember not only do you have to come up with the $$$ to run the A/C your building and land costs at least double what the rest of the USA pays. Of course you don't need a heater for your in ground swimming pool, expect maybe in Dec-Feb. Never mind the petrol to do your 45 minute commute each way daily to the job.

https://en.wikipedia.org/wiki/Seasonal_energy_efficiency_ratio
oh, for Peter https://en.wikipedia.org/wiki/European_seasonal_energy_efficiency_ratio
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