Air-water heat pump current consumption and data

How does that add up? 7.5 kW power consumption? o_O

True, that actually can't be right :D

Probably 3 hours per cycle... not per day.... or??

what?
No, of course not... that is the average over several weeks/months.
So average compressor runtime.

Just checked November: 1,165 kWh heat with 197 kWh electricity (brine heat pump) for 171sqm KfW40 in the freezing cold Hochsauerland. This is the heating value taken from the mouse cinema of the heat pump, so without hot water and presumably without pump power. The total electricity consumption of the house (i.e. including hot water, ventilation, household electricity) is 406 kWh. In summer (with the heating switched off) it was always about 200 kWh – the difference to the total consumption in Nov is therefore 206 kWh, which fits quite well with the specification from the mouse cinema.

I just realized that I somehow messed up the reading for 01.11, so I can only provide the consumption for October and November together.

~195sqm, KFW55, 2 adults 2 small children, ground-source heat pump with drilling, controlled residential ventilation with heat recovery, West Germany/NRW. Room temperature 21.5 - 22.5 degrees.

364 kWh electricity to 2065 kWh heat energy (COP 5.67) for both months combined.

I assume that over the year, electricity consumption will be somewhere around 2200 - 2300 kWh.

[B]All data including pumps/control.

I am particularly happy about the COP, which is a record so far. The building generally has a low heat demand, obviously. But the COP has not been so great in the past for a ground-source heat pump. I assume that the less efficient domestic hot water demand impacts the annual performance factor more strongly for us, simply because the heating demand proportionally is rather low. I am very curious about December, whether the good consumption figures will be confirmed.

I am also glad to have wrapped the house "all around" in EPS/XPS - not just the walls, but the entire floor slab is on XPS, the flat roof is insulated likewise, the parapet completely etc. - apart from the windows and a few wall penetrations, the building is practically free of any thermal bridges. The low heat loss proves this.[/B]

aside from the windows and a few minor wall penetrations, the building is practically free of any thermal bridges. The low heat loss proves this.

Yes, the EIFS is completely superior in this regard. My monolithic masonry is full of thermal bridges. As a result, the heat loss increases significantly.

I just realized that I somehow messed up the reading for 01.11, so I can only provide the consumption for October and November together.

~195 sqm, KFW55, 2 adults 2 small children, ground-source heat pump with drilling, controlled residential ventilation with heat recovery, western Germany/NRW. Room temperature 21.5 - 22.5 degrees.

364 kWh electricity on 2065 kWh thermal energy (COP 5.67) for both months combined.

I assume that on an annual basis, the electricity consumption will be somewhere around 2200 - 2300 kWh.

[B]All data including pumps/control.[/B]

So folks, the year is over. How did 2021 go with your heat pumps?

Since my previous reading was bad, I was at least able to determine December and of course the entire year.

December
1659 kWh thermal energy (228 kWh of which for hot water) with 314 kWh electricity and a COP of 5.28 in December.
It was quite cold for our standards in December, although the same period last year was similar but with noticeably worse COP during the heating season. Either the tentative optimizations of recent years really made a difference or the wisdom that there is still moisture in the building is confirmed. Maybe both.

On an annual basis, it was 10,532 kWh thermal energy, of which 2707 kWh was for hot water (~26% share).
2407 kWh electricity (previous year: 2439 kWh) was used, at €0.195/kWh plus €70 basic charge p.a., so about €540 p.a., respectively €45 p.m.
The annual performance factor is 4.375, which is still not great for a ground-source heat pump but better than 4.21 last year. The trend is positive. I am also not sure whether really better values would be achievable with the "simple" model used here (fixed-speed) and the hot water share of 26%.