ORC BINARY CYCLE GEOTHERMAL PLANT AND PROCESS

摘要

The present invention relates to an ORC binary cycle geothermal plant, comprising at least one ORC closed-cycle system (2, 2', 2") and a geothermal system (3). The geothermal system (3) comprises at least: one intake line (10) of a geothermal fluid (GF) connected to at least one geothermal production well (11), wherein the geothermal fluid (GF) comprises non-condensable gases (NCGs); one interface line (12) connected to the intake line (10) and operatively coupled to the ORC closed-cycle system (2, 2', 2") in an interface zone (13), wherein the geothermal fluid (GF) exchanges heat with the organic working fluid (OWF) of the ORC closed-cycle system; one reinjection line (14) connected to the interface line (12) and to at least one geothermal reinjection well (15). The geothermal system (3) further comprises: at least one separator device (16, 16', 16") configured to separate at least the non-condensable gases (NCGs) from the geothermal fluid (GF); one expander (19) operatively connected to an outlet (17, 17', 17") of the non-condensable gases (NCGs) by the separator device (16, 16', 16"); and one auxiliary generator (20) operatively connected to the expander (19). The expander (19) is located downstream of the interface zone (13) for interfacing with the ORC closed-cycle system (2, 2', 2") so as to receive and expand at least the non- condensable gases (NCGs) after they have exchanged heat with the organic working fluid (OWF).