Andy wrote: ↑Tue Jan 28, 2025 11:05 am
The curve gives a starting point for the calculated flow temp based on the outside air temperature. A perfectly sealed house in a black box where the outside temp is modified would mean the heat loss is perfect and the curve would work perfectly. However, things like air replacement in the house caused by wind outside and solar gain through the windows mean it is never going to be perfect. It will be heating too much or too little based on the extra environmental factors. That's then where the active adjustment comes in and the internal temperature is monitored and extra corrections added based on that. Make sure the sun doesn't land on your internal or external temperature monitoring or that will throw off the calculations.
Thanks Andy, nice and clear that.
Been in past to see AGT this afternoon, tge SH's live with a hell of a view across the Tay.
Just arrived in Edinburgh to an email.confirming 24th March as a start date for 3g going in!
Last readings before leaving this morning. Sub 14kWh HP.
15kW PV SE, VI, HM, EN
42kWh LFPO4 storage
7kW ASHP
200ltr HWT.
73kWh HI5
Deep insulation, air leak ct'd home
WBSx2
Low energy bulbs
Veg patches & fruit trees
Man I’m seriously jealous of your COP figures. All that hard work really has paid off. I must try and calculate my scop. Might be tricky as the drive with all my data is playing silly buggers right now
Andy wrote: ↑Tue Jan 28, 2025 3:29 pm
Man I’m seriously jealous of your COP figures. All that hard work really has paid off. I must try and calculate my scop. Might be tricky as the drive with all my data is playing silly buggers right now
Sorry pal.
I tried for serious attention to detail from the beginning. That concluded with the secondary lagging checks on the pipes upstairs. Every therm held onto!
The high cop's are now a given (not meant arrogant). Now playing for the 24hr kWh consumption. A moving target to be sure what with outdoor temps. First soujorn into the 12's at the moment.
15kW PV SE, VI, HM, EN
42kWh LFPO4 storage
7kW ASHP
200ltr HWT.
73kWh HI5
Deep insulation, air leak ct'd home
WBSx2
Low energy bulbs
Veg patches & fruit trees
First 24hrs of house running itself. No wbs influence so a few kWh's extra on the HP. Battery set to discharge in the morning. It works out at costing us 70p per day.to heat home & dhw. One person showering.
Digs.
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15kW PV SE, VI, HM, EN
42kWh LFPO4 storage
7kW ASHP
200ltr HWT.
73kWh HI5
Deep insulation, air leak ct'd home
WBSx2
Low energy bulbs
Veg patches & fruit trees
It was ok, some aspects seemed to be a bit out of date and they seems to suggest that installs are more expensive even after the BUS - it was very generalised in some respects but specific in others, I suspect there will be a lot of comment about the family that had an instal that had a 300 litre cylinder for the hot water and a smaller separate hot water cylinder for the heating?? that was very odd to my mind.
As programmes go I think it was already out of date before it aired and all over the place and not overly informative - shame as I really wanted to enjoy it but I didnt.
I liked the bit with Scottish Water extracting heat from a sewerage treatment pant for the district heat pump system, that looks like a great idea.
3.87kWp PV
10.24kWp PV SolarEdge system
Tesla Powerwall 2
100 x 47mm Navitron tubes (still being installed!) Now likely to be removed for more PV.
MK2 PV router DHW diverter
Morso 5kW WBS
Vaillant AroTherm 10kW ASHP
Nissan Leaf
yes that bit was good but then I thought given the current opinions on Water companies you might not get too many non industrial takers for such a system. I remember ages ago suggesting that grey water from homes could be tanked on site to have the useful heat extracted before it went of to the garden or the waste treatment works, maybe a small heat exchanger at the ASHP to compliment the main air source as the water runs to waste would yield better efficiencies for heat recovery ? I expect the benefits wouldnt merit the costs but maybe on a DIY basis it could help?
