Geothermal hydrogen production system

A geothermal hydrogen production system comprising an electrolyser, a primary circuit and a secondary circuit, the primary liquid circuit circulating a liquid into a geothermal well and returning heated liquid from a well head of the geothermal well, the heated liquid passing through a desalination plant within the primary liquid circuit, the heated liquid of the primary circuit passing a heat exchanger to heat a working medium of the secondary circuit, wherein the heated working medium of the secondary circuit drives a first turbine to produce a first mechanical output and the heated liquid of the primary circuit drives a second turbine to produce a second mechanical output;

• wherein the first mechanical output drives an electrical generator configured to power the electrolyser generating hydrogen via electrolysis of fresh water, and the second mechanical output drives a compressor to provide at least one of a first, a second and a third compressed air supply, wherein the first compressed air supply drives a supply pump to supply salt water to the desalination plant, the second compressed air supply drives a start-up pump to initiate the primary liquid circuit, and the third compressed air supply drives a fresh water pump to deliver fresh water from the desalination plant to the electrolyser.

A method of generating and feeding fresh water to an electrolyser to produce hydrogen, powered by geothermal energy, comprising the steps:

• feeding a liquid into a geothermal well and drawing heated liquid from the well head of the geothermal well to form a primary liquid circuit, the primary liquid conveying heat energy to a desalination plant;
• communicating the heated liquid from the primary liquid circuit to a first turbine and a second turbine to produce a first mechanical output and a second mechanical output respectively;
• directing the first mechanical output to an electrical generator to power the electrolyser configured to generate hydrogen via electrolysis of fresh water, and directing the second mechanical output to a compressor to produce at least one of a first, a second and a third compressed air supply, wherein the first compressed air supply drives a supply pump configured to drive salt water to the desalination plant, the second compressed air supply drives a start-up pump to initiate the primary liquid circuit, and the third compressed air supply drives a fresh water pump to pump fresh water from the desalination plant to the electrolyser to be decomposed into hydrogen and oxygen.

A method of generating and feeding fresh water to an electrolyser to produce hydrogen, powered by geothermal energy, comprising the steps:

• feeding a liquid into a geothermal well and drawing heated liquid from the well head of the geothermal well, the heated liquid of the primary circuit being fed to a heat exchanger to heat a working medium of the secondary circuit, the heated working medium passing through a desalination plant, wherein the heated working medium of the secondary circuit drives a first turbine and a second turbine to produce a first mechanical output and a second mechanical output respectively;
• directing the first mechanical output to an electrical generator to power the electrolyser configured to generate hydrogen via electrolysis of fresh water, and directing the second mechanical output to a first compressor to produce at least one of a first, a second and a third compressed air supply, wherein the first compressed air supply is configured to drive a supply pump to drive salt water to the desalination plant, the second compressed air supply drives a start-up pump to initiate the primary liquid circuit, and the third compressed air supply drives a fresh water pump to pump fresh water from the desalination plant to the electrolyser to be decomposed into hydrogen and oxygen.