Method for efficient cold recovery in o2-h2 combustion turbine power generation system

A method of efficient cold recovery from a hydrogen stream 101, comprising:

• heating a cold hydrogen stream 102 by indirect heat exchange with a first portion of an inlet stream 124 in hydrogen heat exchanger 123, thereby producing a first cool inlet stream 126, and a gaseous hydrogen stream 112,
• heating a liquid oxygen stream 106 by indirect heat exchange with a second portion of an inlet air stream 125, and a compressed cool feed air stream 108, in at least one main heat exchanger 109, thereby producing a second cool inlet air stream 127, a further cooled feed air stream 111, the cold feed air stream 103, and a gaseous oxygen stream 113,
• wherein
• at least a portion of the second cool inlet air stream 127, and at least a portion of the first cool inlet air stream 126 are combined and introduced into a cold booster 114, thereby producing the compressed cool feed air stream 108,
• at least a first portion 115 of the further cooled feed air stream 111 is introduced into an expander 116, thereby producing an expanded feed air stream 117,
• a second portion 118 of the further cooled feed air stream 111 is further cooled, thereby producing the cold feed stream 103, and
• wherein the liquid oxygen stream 106 has a first molar mass flow rate, and the cold hydrogen stream 102 has a second molar flow rate that is between 1.5 and 2.5 times the first molar mass flow rate.

A method of efficient cold recovery from a hydrogen stream 101, comprising:

• heating a cold hydrogen stream 102 by indirect heat exchange with a first portion 124 of an inlet air stream 107 in liquid hydrogen heat exchanger 123, and a first fraction 128 of compressed cool feed air stream 108, thereby producing a first cool inlet air stream 126, a first branch 115 of a first section of a further cooled feed air stream 141, and a gaseous hydrogen stream 112,
• heating a liquid oxygen stream 106 by indirect heat exchange with a second portion of an inlet air stream 125, and a second fraction of a compressed cool feed air stream 129, in at least one main heat exchanger 109, thereby producing a second cool inlet air stream 127, a third portion 130 of second section of further cooled feed air stream 142, a second fraction of a compressed cool feed air stream 134, and a gaseous oxygen stream 113,
• wherein
• at least a portion of the second cool inlet air stream 127, and at least a portion of the first cool inlet air stream 126 are combined and introduced into a cold booster 114, thereby producing the compressed cool feed air stream 108,
• at least a first portion 115 of the further cooled feed air stream 141, and at least a third portion 130 of further cooled feed air stream 142 are combined and introduced into an expander 116, thereby producing an expanded feed air stream 117,
• a second portion 118 of the further cooled feed air stream 141 is further cooled, thereby producing the cold feed air stream 133,
• a second portion 131 of the further cooled feed air stream 142 is further cooled, thereby producing the cold feed air stream 134, and
• wherein the liquid oxygen stream 106 has a first molar mass flow rate, and the cold liquid hydrogen stream 102 has a second molar flow rate that is between 1.5 and 2.5 times the first molar mass flow rate.