Using rainwater and treated water for brine water heat pump

Hi,

we want to heat with a brine water heat pump,
the energy source here should be energy baskets, through which on the one hand rainwater and on the other hand the clarified water from the septic tank shall infiltrate.
Infiltration is permitted,
the groundwater level is such that the baskets would be standing in the groundwater at about 4m installation depth, if I’m not mixing up any terms here.
The percolation should then take place via soakaways.

Good idea or rather a pointless plan?
Thanks for your ideas and opinions!

interesting idea!

EnergieKörbe means suction baskets with coarse/fine filter for suction or storage tank (fresh water)
standing in the groundwater (= heat exchanger)?

That somehow sounds like quite a lot of maintenance effort, so everything should remain easily accessible.

How many m³ of available groundwater reserve are you calculating with?
You can harvest about 1.2 kWh/m³*K.
At (estimated) 12° water temp in winter, the m³ of water starts to freeze after withdrawing ~14kWh,
if not enough warm water flows in from the side.

exciting, but the dimensioning would be a bit too vague for me.

If you can "reverse" the heat pump, you could introduce the waste heat of the A/C there in summer.

I am a layman in detail and therefore cannot give you any values, the idea came to me with my basic understanding of physics. We are building in the marsh area. The baskets are simple 3-4 meter long metal baskets to which the absorber hoses are attached. Another idea would be to design everything as an infiltration shaft and place the baskets underneath. Whether something like that is even feasible is beyond my knowledge, we were only told that rainwater infiltration via absorber mats would increase their efficiency.

A moist ground or precipitation is generally very suitable for near-surface collectors, whether it is a classic flat plate collector, baskets, trenches, or whatever else. As long as the other involved trades do not see a problem with it, I think the idea is not wrong.

Hello,

I am currently searching the web for exactly this topic
[Rigole über Grabenkollektor oder Erdwärmekorb für zusätzlichen Wärmeeintrag]

Have you implemented it that way yourself?
Or are there any readers who have experience with this?

The baskets or collectors regenerate through the water, so far so good. A soakaway above it is therefore not wrong at first. Whether the whole thing is worthwhile is a completely different matter. This requires a proper design, heating load calculation, etc. etc.