Groundwater heat pump - disadvantages?

You introduce substances into the heat pump in an open system, which a W-W heat pump inevitably is, that you might not even want in the heat pump. That can work well for a long time, or only briefly... You probably won't find any long-term experience. At the slightest indication that there is something in the water that is detrimental to the heat pump, I would avoid it. If the water is, for example, too high in iron content, it will damage the system significantly faster than with other substances. But I am not a specialist in that regard. I can only tell you (also from the Rhine region, specifically Rhein Kreis Neuss) what worked for us. And because of shallow groundwater, such a heat pump could also be used. But I was advised against it because of the wrong substances in the water. And after I filled the pool with well water, I knew why. You could have almost cast a steel beam from the water. But look, that won't help you. For that, you need a specialist.

But there are also solutions for this, such as a heat exchanger. There are also apparently solutions to use a hot water storage tank as a heat exchanger. Overall, I have absolutely rudimentary knowledge in this area and also recommend consulting a specialist.

Since I always think it's good to give feedback after many ideas later on:

The test drilling has taken place, lab results are in:
Manganese at 0.429mg/l well above the norm of max. 0.1mg/l
Carbonic acid 47mg/l instead of 5mg/l

According to the well driller, the system would still be possible (he also wants the contract), you would just have to "dewater" regularly. The heat pump manufacturer only gives a warranty for their heat pump with an intermediate heat exchanger.

Doesn't really sound good to us, which is why we will probably switch to the not really liked air/water heat pump (and save about €9000 for the well).

Hi, didn’t want to start a new topic.

The situation is as follows: Our property is located in drinking water protection zone 3 B. Now the question is whether there are special regulations for a sewage pipe there or if certain requirements exist. The background is that the house construction company is planning to use KG2000 pipes (the green ones), which are of course more expensive than the “normal” KG100 pipes (orange).

I can’t find anything on the internet and also can’t get anyone on the phone or a response by email from the authorities.

Maybe someone has an idea/a tip

Thanks in advance and have a relaxing Sunday

Spike

Inform yourself about the topic [Eisspeicher].

Ice storage is too expensive and complicated for a single-family house. We had also considered it.
A groundwater heat pump was also discussed at one point because of the well.
But there were several problems. Insufficient discharge capacity, no approval in the water protection area, temperature difference that would be permissible...