ᐅ Air-to-Water Heat Pump: Current Consumption and Data

Created on: 29 Sep 2020 11:06
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Bookstar
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
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Malz1902
15 Feb 2021 15:00
Zaba12 schrieb:

Just like that? ...and before that, it was too warm by 5 degrees? I don’t understand this measure as a standalone solution?
tomtom79 schrieb:

Well, I don’t know which air-to-water heat pump he has, but if he limits the maximum supply temperature, he will probably have to achieve the required return temperature mainly through runtime, which would be positive. Since the temperature difference at the outside temperature is so small, it probably won’t get cold.


@Zaba12, no, it wasn’t too warm, nor too cold. The supply temperature was 35°C (95°F), the return mostly around 31–32°C (88–90°F). Now the supply is 30°C (86°F) and the return 28°C (82°F). Let’s test whether this makes a difference.
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Malz1902
15 Feb 2021 15:03
The summer/winter heating threshold is set at a 24-hour average of 16°C (61°F). For example, last April/May there were several times when the 24-hour average temperature was above 16°C (61°F), but we still had to heat again for 2-3 days during some very warm days, followed by another significant cold spell.
face2615 Feb 2021 15:14
So, did you just limit the maximum supply temperature now? Or did you also adjust something else like shifting it or lowering the heating curve?

And nothing else changed? Increased flow rates or anything like that?

If the room temperature was fine before and now you only limit the supply temperature... what do you think will happen? :-D

Edit: addressed to @Malz1902
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Zaba12
15 Feb 2021 15:14
As far as I remember, we already turned off the heating last April because the entire month was sunny from the start. I remember it clearly because I was frustrated about the storage system not being installed yet, which could have allowed us to be self-sufficient overnight one month earlier.
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Zaba12
15 Feb 2021 15:17
face26 schrieb:

So, have you simply limited the maximum supply temperature now?
Or did you also shift the schedule or lower the heating curve?

And nothing else adjusted? Higher flow rates or anything like that?

If the room temperature was fine before and you now only limit the supply temperature... what do you think will happen? :-D

Haha, that’s what I’m saying...

@Malz1902 if your error codes are still active, you won’t notice any difference temperature-wise, except that the heat pump will run longer than before at the same outdoor temperature.
tomtom7915 Feb 2021 19:41
Malz1902 schrieb:

@Zaba12
, no, it wasn’t too warm, nor too cold. The supply temperature was 35°C (95°F), the return usually around 31-32°C (88-90°F). Now the supply is 30°C (86°F) and the return 28°C (82°F), testing to see if that makes a difference.
Which heat pump do you have? Can you manually reduce the performance of the circulation pump so that your temperature difference increases?