FIELD: power industry.
SUBSTANCE: tube for using low-temperature energy, containing grooves 220 directed inward towards outer surface of tube (20) is proposed; at that, grooves (220) are open above some part of external side surface, and guide wall which is the closest to tube rotation axis of groove (220), acts as the element determining the position of internal tube (10) installed inside tube (20). At that, tube (20) has at least three grooves (220) between which walls are arranged so that central part of tube (20) forms internal tube (10). Low-temperature energy using system is proposed, which includes the following: heat exchanger and circuit arranged in the ground, containing system of tubes with circulating fluid medium, via which low-temperature energy removed by means of heat exchanger flows; the above circuit is formed by means of internal tube and its enveloping external tube so that outer end of tube is plugged, and fluid medium depending on flow direction flows on the tube end from internal tube to external tube and vice versa; outer surface of external tube includes inward directed grooves which are open above some part of outer surface, and guide wall of groove, which is the closest to tube rotation axis, acts as the element determining the position of internal tube 10.
EFFECT: higher heat-availability factor of internal parts of the earth.
2 cl, 22 dwg
