Where is the overall COP higher than the COP of HZ and TWE? I am only surprised that there are not always values for TWE.
Currently, I do not use external heat meters. I once considered using external meters, but just connecting the whole thing with calibrated meters to my KNX system would cost me several hundred euros. That way, I could record the consumption of photovoltaics, battery, heating, and household myself. I can do that now too, but not calibrated and from the manufacturer. However, I do not yet see the added value that much. Yes, I would be interested in exact values. Is it worth several hundred euros to me?
What kind of fluctuations can we expect? 1-3%? 3-5%? 5-7%? 7-10%?
What does the manufacturer specify for the pump? I found something about a max of 4.3 COP. As always, manufacturers tend to exaggerate. So calculate with a COP of 4 under ideal conditions. You calculated 5? So you "overestimated" by about 25%.
What does the manufacturer specify for the pump? I found something about a max 4.3 COP. As always, manufacturers tend to exaggerate. So calculate with a COP of 4 under ideal conditions. You calculated 5? So you "overestimated" by 25%.
According to the datasheet, the performance figures are as follows: A-7/W35: 3.15 A2/W35: 4.11 A7/W35: 5.04 On Friday I had a COP of 4.5 and on Saturday 4.62. This is above the manufacturer’s specification, but that also assumes a flow temperature of 35°C and we lowered the domestic hot water temperature from 52°C to 48°C. So we are within range. I wonder if the manufacturer can even exaggerate the official COP values. As far as I know, these values are not determined by the manufacturer.
is currently at 5.3. Heating alone is 4.9 and drinking water 3.6.
Even though it is averaged, it does not seem consistent. Most likely, the specification of the heat pump is somewhat optimistic. But even if the averaged COP were only 4.5, that is good!
According to the datasheet, the following performance figures apply: A-7/W35: 3.15 A2/W35: 4.11 A7/W35: 5.04 On Friday, I had a COP of 4.5 and on Saturday 4.62. This is above the manufacturer's specification, but this assumes a flow temperature of 35°C and we lowered the TWE temperature from 52°C to 48°C. So we are within the range. I wonder if the manufacturer can even exaggerate the official COP figures. As far as I know, the manufacturer does not determine these values.
well, it's like with cars, right? These test cycles by the manufacturers never correspond to real-world conditions. So I would always deduct 20% there. This also applies to the consumption of electronic devices, etc.
Are you a seller of "Kermi" (whatever that is)? Do you want to "sell" me your heat pump :cool:? I have 160m2 and yesterday a consumption (heating only) of about 25kwh! Temperatures 20-22°C...