A combined cycle dual closed loop electric generating system, comprising: a gas turbine assembly comprising a combustion chamber , a compressor , a first pump , a first driveshaft , a gas turbine and a first generator ; a steam turbine assembly comprising a second pump , a second driveshaft , a steam turbine and a second generator ; a gas turbine loop capable of holding and conveying a gas turbine loop working fluid ; a steam turbine loop capable of holding and conveying steam turbine loop working fluid ; characterised in that said gas turbine loop and said steam turbine loop each comprise a closed loop system for conveying said gas turbine loop working fluid and said steam turbine loop working fluid through said gas turbine assembly and said steam turbine assembly without co-mingling said gas turbine loop working fluid and said steam turbine loop working fluid between one another; said gas turbine loop working fluid and said steam turbine loop working fluid comprising a liquid and a vapor at different stages within said gas turbine and steam turbine closed loops; said gas turbine loop working fluid circulates through the gas turbine assembly , the first pump and a first heat exchanger ; said steam turbine loop working fluid circulates through the steam turbine assembly , the second pump and said first heat exchanger ; said first heat exchanger transfers first heat energy from said gas turbine loop to said steam turbine loop ; said gas turbine assembly generates a first portion of an electric output by burning H 2 and O 2 running said gas turbine and driving said first generator ; and said steam turbine assembly generates a second portion of said electric output ; and an electrolyzer is provided to generate H 2 and 0 2 and storage tanks are provided to store said H 2 and O 2 separately, prior to use by the gas turbine assembly . a gas turbine assembly comprising a combustion chamber , a compressor , a first pump , a first driveshaft , a gas turbine and a first generator ; a steam turbine assembly comprising a second pump , a second driveshaft , a steam turbine and a second generator ; a gas turbine loop capable of holding and conveying a gas turbine loop working fluid ; a steam turbine loop capable of holding and conveying steam turbine loop working fluid ; characterised in that said gas turbine loop and said steam turbine loop each comprise a closed loop system for conveying said gas turbine loop working fluid and said steam turbine loop working fluid through said gas turbine assembly and said steam turbine assembly without co-mingling said gas turbine loop working fluid and said steam turbine loop working fluid between one another; said gas turbine loop working fluid and said steam turbine loop working fluid comprising a liquid and a vapor at different stages within said gas turbine and steam turbine closed loops; said gas turbine loop working fluid circulates through the gas turbine assembly , the first pump and a first heat exchanger ; said steam turbine loop working fluid circulates through the steam turbine assembly , the second pump and said first heat exchanger ; said first heat exchanger transfers first heat energy from said gas turbine loop to said steam turbine loop ; said gas turbine assembly generates a first portion of an electric output by burning H 2 and O 2 running said gas turbine and driving said first generator ; and said steam turbine assembly generates a second portion of said electric output ; and an electrolyzer is provided to generate H 2 and 0 2 and storage tanks are provided to store said H 2 and O 2 separately, prior to use by the gas turbine assembly . <EOS>