Hello!
I'll start.
Heated area 200m2 (2,153 sq ft)
KfW 55 standard
Mechanical ventilation with heat recovery
Current outdoor temperature 6°C (43°F)
Heating energy consumption including hot water 35 kWh
Electricity consumption 9 kWh
COP 3.88
I'll start.
Heated area 200m2 (2,153 sq ft)
KfW 55 standard
Mechanical ventilation with heat recovery
Current outdoor temperature 6°C (43°F)
Heating energy consumption including hot water 35 kWh
Electricity consumption 9 kWh
COP 3.88
Oetzberger schrieb:
AITThat is the favorite heat pump in the other forum.It's surprising that with 46 degrees Celsius (115°F) hot water temperature and a 3-degree Celsius (5°F) differential you have such low hot water consumption. It's said to be about one-third of the total consumption. So either you never wash 🙂 or your building is still extremely damp.
Dennis89 schrieb:
The heat pump is currently running for 14 hours straight and uses about 8 kWh.Dennis89 schrieb:
Today, it used 3.5 kWh and produced 19.38 kWh of heat.Hmm, which is it then? Doesn’t “currently” mean today?
driver55 schrieb:
Hmm, so what is it now?
Is it not today currently?The 8 kWh were yesterday 🙂 Today the meter shows 3.5 kWh. How can I find out how much the heat pump can modulate down?
O
Oetzberger31 Oct 2021 22:07KingJulien schrieb:
Can you set an outdoor temperature offset?
I’m currently testing a 24-hour average temperature for exactly that reason.
Combined with a slight daytime increase and a storage heater, it seems I can pretty much avoid heating at night.
At least so far, given the temperatures. Unfortunately, the Luxtronik controller from AIT does not support outdoor temperature offset or 24-hour averaging. That would probably be a better control method for my solid construction with a lot of thermal mass and because of the cold spikes at night.
Another downside is that I can’t limit the maximum output of the modulating heat pump, so it runs at full power for about an hour before it throttles down.
Have you ever measured how much operating only during the day benefits the coefficient of performance?
A
Alessandro1 Nov 2021 09:09When comparing data, you should also include the room temperature (possibly also the temperature in the bathroom).
My neighbor uses one-third less energy but only keeps 19.5°C (67°F) in the living room and bathroom, while I have 22°C (72°F) in the living room and 23.5°C (74°F) in the bathroom.
Since I reset my heat pump after every new adjustment, I unfortunately don’t have consistent comparison values.
However, last winter was certainly one of the coldest in recent years. That should not be forgotten...
My neighbor uses one-third less energy but only keeps 19.5°C (67°F) in the living room and bathroom, while I have 22°C (72°F) in the living room and 23.5°C (74°F) in the bathroom.
Since I reset my heat pump after every new adjustment, I unfortunately don’t have consistent comparison values.
However, last winter was certainly one of the coldest in recent years. That should not be forgotten...
KingJulien1 Nov 2021 13:12@Oetzberger
No, I’m not that far yet, it’s the first heating season 😀 I only set it up a few days ago in preparation for expected photovoltaic integration. But I don’t have any logs yet; everything is still pretty much trial and error.
My main problem so far has been that the heating system doesn’t return from setback mode back to heating mode. Even with several K Delta T attempts, it didn’t want to heat.
I suspect the "Relative Heating Power" setting. It was always around 0 or even negative. I experimented a bit, increased the P gain on the controller, and also slightly toned down the (assumed) total oversizing of the heating system.
Today, the heating finally kicked in.
That’s rough.
Have you set heating schedules? Do you let it heat during the night?
@Alessandro
Why do you reset every time? Does it delete all values?
Hard reset or just the controller?
No, I’m not that far yet, it’s the first heating season 😀 I only set it up a few days ago in preparation for expected photovoltaic integration. But I don’t have any logs yet; everything is still pretty much trial and error.
My main problem so far has been that the heating system doesn’t return from setback mode back to heating mode. Even with several K Delta T attempts, it didn’t want to heat.
I suspect the "Relative Heating Power" setting. It was always around 0 or even negative. I experimented a bit, increased the P gain on the controller, and also slightly toned down the (assumed) total oversizing of the heating system.
Today, the heating finally kicked in.
Oetzberger schrieb:
Another drawback is that I can’t limit the maximum output of the modulating heat pump, and it runs at full power for about an hour before throttling down.
That’s rough.
Have you set heating schedules? Do you let it heat during the night?
@Alessandro
Why do you reset every time? Does it delete all values?
Hard reset or just the controller?
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