Pipelines in the floor slab

The work on the foundation slab is starting! That means all pipes and supply lines will be laid. For my earth collectors (surface) heating, I want to provide pipes in which I can thread the supply and return pipes afterwards! I am thinking of 2xDN150 pipes spaced 30-50cm apart. The bend with 6x15° elbows. Would that be OK? The connection to the manifold (approx. 8 heating circuit distributors in the meadow) is about 15m away from the heating system!! The soil contains clay up to 40m deep with little gravel content. Or would deep drilling be an alternative?

....Would that be OK? The connection to the spider (about 8 heating circuit distributors in the meadow) is about 15m away from the heating system!!

Surely [Sole- distributors or collectors] are meant.

....The soil is clayey up to 40m with little gravel content. Or would a deep drilling be an alternative?

With this soil, a surface or trench collector is quite suitable. Vertical drilling is somewhat more expensive ;-) Decisive are the required extraction energy and power. How high were they determined? Finally, the hydraulics of the [Sole].

Calculated were 10.3KW. Did you mean these values?

How is it with the first point. I meant the installation of the pipes under the floor slab for the supply lines!? What distance/slope/size? In pipes or directly in the slab!?

Calculated were 10.3KW. Did you mean these values?

What do the 10.3 kW stand for? It is not an energy, but a power, but which one?

.... Into pipes or directly into the plate!?

Into pipes! There are also prefabricated house entries, but significantly more expensive.

v.g.