GEOTHERMAL HEAT EXCHANGER, GEOTHERMAL HEAT ARRANGEMENT AND METHOD FOR CHARGING THERMAL ENERGY INTO GROUND

摘要

The invention relates to a geothermal heat exchanger, a geothermal heat arrangement and to a method in connection with a geothermal heat arrangement. The geothermal heat exchanger comprises a piping arrangement (10, 11, 20, 21) having a rise pipe (10, 11) and a drain pipe (20, 21), and a first pump (8) arranged to the piping arrangement (10, 11, 20,21). The rise pipe (10, 11) and drain pipe (20, 21) are arranged in fluid communication with each other for circulating the primary working fluid. The rise pipe (10, 11) is provided with a first thermal insulation (25) surrounding the rise pipe (10, 11) along at least part of the length of the rise pipe (10, 11) and the first pump (8) is arranged to circulate the primary working fluid in a direction towards a lower end of the rise pump (10, 11).