ᐅ Piping in the foundation slab

Work on the foundation slab is starting! This means all pipes and supply lines will be installed. For my ground collector (surface) heating system, I want to provide pipes through which I can later thread the supply and return lines. I am thinking of 2 x DN150 pipes spaced 30-50cm (12-20 inches) apart, with bends of 6 x 15° elbows. Would this be acceptable? The connection to the manifold (approximately 8 heating circuit distributors in the lawn) is about 15m (50 feet) away from the heating unit.

The soil is clayey up to 40m (130 feet) deep with a low gravel content. Would deep drilling be a viable alternative?

mirk909 schrieb:
....Would that be acceptable? The connection to the manifold (approximately 8 heating circuit distributors in the field) is about 15 m (50 feet) away from the heating system!!

I assume you mean brine manifolds or collectors.

mirk909 schrieb:
....The soil is clayey up to 40 m (130 feet) deep with little gravel content. Or would a deep borehole be an alternative?

With this type of soil, a horizontal or trench collector is definitely suitable. Vertical boreholes tend to be somewhat more expensive ;-)
The deciding factors are the required extraction energy and capacity. What values were determined for these? Finally, consider the hydraulics of the brine system.

The calculated value is 10.3 kW. Is this what you meant?

Regarding the first point: I was referring to the installation of the pipes below the floor slab for the supply lines. What spacing/slope/diameter should be used? Should the pipes be installed inside conduits or directly in the slab?

mirk909 schrieb:
Calculated was 10.3 kW. Did you mean these values?

What does the 10.3 kW represent? This is not an amount of energy, but power—so what exactly?

mirk909 schrieb:
.... Into pipes or directly into the slab!?

Into pipes! Prefabricated house entries are also available, but they are significantly more expensive.

Best regards