FIELD: power engineering.
SUBSTANCE: underground circuit is used, for example, to transmit thermal energy extracted from environment, to a thermal pump or a similar device. The underground circuit comprises a collector system of pipes, made in the form of coil turns to produce at least two ring pipes of various cross section, formed by hollow shapes, besides, pipes are arranged and mounted substantially concentrically, so that adjacent pipes form between each other separate volumes of the flow, and their most internal cavity stretches along the entire length of the collector system of pipes.
EFFECT: due to large quantity of hollow shapes placed along the entire length of the pipeline, the collector system of piles becomes considerably shorter, which simplifies its assembly and operation.
11 cl, 16 dwg
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