Ice formation brine pipe heat pump

A quick update. The drilling company flushed the brine for half a day last week. Unfortunately, it brought no improvement. Then yesterday, suddenly an excavator was in the garden and the connections of all three drillings were opened again. Lo and behold, the guy from the drilling company had swapped two lines on one connection. This has now been fixed and flushed again for 2 hours. In the evening, I turned on the heat pump and lo and behold, the temperature remained relatively stable at first at 11 and 7 degrees in the supply and return flow, then overnight it dropped further to 3 and -3 degrees. We are supposed to flush the line all day today and then hope that it is normal. I think the difference of 6 degrees between supply and return flow is too much?

Does this really come from air in the system?

One more addendum, so the all-day flushing apparently didn’t help... After 3 hours we already have +3 and -2 degrees again :rolleyes:

The odyssey continues, after the brine lines were changed and the brine temperatures still went into the negative range, it was found that the Tichelmann was wrong again :rolleyes:

Now it has been changed for the 3rd time. Now we have fairly stable temperatures in the positive range. However, the differential between supply and return is permanently over 5°C, so something still isn't right....

Next week an expert will come and take a look at the whole system...

Hello Stadtvilla19, that all sounds dreadful. We are still at the very beginning of the decision for/against the installation of a brine heat pump with deep drilling. I have a question: doesn't the system have to be officially inspected by an independent expert before commissioning? That is the information I received. I had hoped to be able to exclude any risks, e.g. from incorrect installation, already before commissioning.

Hey,

no, no expert needs to look at it...

Despite the difficulties, I don't hold the view "I should never have gotten a heat pump."

I think the technology itself is great and very efficient. We just kind of had bad luck with the company, even though they've been installing heat pumps for 20 years.

I've now learned that you should ideally ask the company for references and talk to the people about how satisfied they are with their system, and definitely have a brine distributor installed. For cost reasons, only a Tichelmann system was installed for us, which is really a pain to vent properly. But how are you supposed to know that if you don't look into it beforehand...

Additionally, we had the bad luck that a guy from the drilling company built our Tichelmann who had never done it alone before. He cobbled something together that just doesn't work. The sad part is, the same guy was supposed to fix his work and got it wrong a second time. Only the third time, when a colleague helped him, did it finally become a real Tichelmann....

It is good to know that you still find the system good! Then I keep my fingers crossed that it will hopefully run smoothly now! Thanks and best regards