Experiences with brine heat pump

I have the passwords and such – I could change that too – but I don’t necessarily want to (I might break something and then the warranty is gone) The brine outlet temperature for you never drops below +2 °C? How much heating load do you have at how many bore meters (and what extraction performance does your ground have)? COP is even specified at 0°C brine inlet, right?

My data is on page 1. For me, the minimum is in the negative range. Last winter after long cycles I had an outlet of 5°C. It wasn’t really, really cold then either, but still much colder than it has been so far this year. COP is mostly 0°/35C for brine heat pumps. Usually the inlet is higher and the flow temperature lower; exact diagrams showing how the COP behaves are in the manual.

Yes, two buffers in the heating room. But so far only two of us and both work full-time. Pretty much exactly 900 kWh HT and 900 kWh NT. So a total of 1800 kWh.

Do you have a heat meter?

Yes, what do you want to know?

Yes, the generated amount of heat, otherwise all of this has little significance or the comparison becomes more difficult

Then I'll have the source checked again. We specifically commissioned extra meters (2x70). The AZ was actually okay so far - at 5.2.