ᐅ Ground source / water source heat pumps

And how can I determine how much surface area the collector needs to have? Of course, it depends on many factors (user behavior, living area, soil conditions), but aren’t there any general guidelines?

corner schrieb:
And how can I determine how much area the collector needs?

Once the cooling capacity has been calculated. In addition, different collectors require varying surface areas, yield different outputs, and have different costs. If the available surface area is very limited, the only option left is the vertical probe. Experimenting is hardly worthwhile because every heat pump depends on its energy source. If this source is undersized, the overall investment tends to become uneconomical.

corner schrieb:
...Of course it depends on many factors (user behavior, living area, soil conditions) But aren’t there any guidelines?

I don’t know of any, as they wouldn’t be reliable anyway. There are only two options: either you trust the salesperson and hope everything works out, or you hire an external planner. In the end, everyone gets what they deserve!

Best regards

Where can I find a qualified consultant who can advise me on these issues? Do you know anyone near Hamburg?

I have checked and learned that deep drilling is only possible up to a depth of 35m (115 feet). So I probably need more than one borehole, right? And that will likely be significantly more expensive?

Best regards, corner

corner schrieb:
Where can I find a qualified consultant to advise me on these questions?

For planning the entire system in a new build, thanks to the internet, you don’t necessarily have to be located in Hamburg. You can send me a private message.

corner schrieb:
...I found out that deep drilling is only possible up to a depth of 35m (115 feet). So I probably need more than one borehole, right? ...And that will likely be significantly more expensive?

That depends on the heating load, but it’s likely. Moving the drilling rig multiple times naturally increases the costs.
My approach, that the heat source sizing begins with the building design, is generally proven. Low heating loads => low costs for source development.
In quite a few cases, this effort can be avoided by using an air-source heat pump, provided the conditions are suitable. Which solution is ultimately the most reasonable can only be reliably answered when calculations based on the building data are available. Air-source heat pumps achieve lower annual performance factors compared to ground-source systems, but the costs for source development are eliminated. It is purely an economic calculation which option to choose. Future energy costs are reduced through investments. For a decision, the actual energy demand for heating and domestic hot water based on the building data and user behavior must first be known (calculated).
Marshland (wet soil) would actually be a good condition for a horizontal ground collector, provided there is enough space for it.
Best regards.