Jordvarmeveksler

A ground heat exchanger (2) comprises a flow leg (3), a heat exchanger leg (4), an upper manifold (7) and a lower manifold (10) to be positioned at the bottom of the borehole (1). The flow leg extends from the upper part of the borehole (1) to the lower manifold (10). The heat exchanger leg (4) comprises an outlet pipe (5) extending upwards from the upper manifold and a plurality of heat exchanger pipes (6) between the upper manifold and the lower manifold. The lower manifold connects the flow leg and the heat exchanger leg. The upper manifold comprises a body (13) forming a fluid space (14), a connection (15) from the fluid space to the outlet pipe and a plurality of connections (16) from the fluid space to the heat exchanger pipes. The flow leg is arranged to go through the fluid space inside a conduit pipe (17) arranged in the upper manifold.