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

Abstract

A method of efficient cold recovery from a liquid hydrogen stream includes warming a cold liquid hydrogen stream by indirect heat exchange with a cold feed air stream in an ASU sub-cooler, thereby producing a warmed liquid hydrogen stream. Wherein at least a portion of the cool inlet air stream is introduced into a cold booster, thereby producing the compressed cool feed air stream. Wherein at least a first portion of the further cooled feed air stream is introduced into an expander, thereby producing an expanded feed air stream. Wherein a second portion of the further cooled feed air stream is further cooled, thereby producing the cold feed air stream. And, wherein the liquid oxygen stream has a first molar mass flow rate, and the cold liquid hydrogen stream has a second molar flow rate that is between 1.5 and 2.5 times the first molar mass flow rate.

What is claimed is: 
     
         1 . A method of efficient cold recovery from a liquid hydrogen stream  101 , comprising:
 warming a cold hydrogen stream  102  by indirect heat exchange with a cold feed stream  103  in sub-cooler  104 , thereby producing a warmed hydrogen stream  105 ,   further heating the warmed hydrogen stream  105  and a liquid oxygen stream  106  by indirect heat exchange with an inlet air stream  107 , and a compressed cool feed air stream  108 , in at least one main heat exchanger  109 , thereby producing a cool inlet air stream  110 , a further cooled feed air stream  111 , the cold feed air stream the compressed cool feed air stream  103 , a gaseous hydrogen stream  112  and a gaseous oxygen stream  113 ,   
       wherein
 at least a portion of the cool inlet air stream  110  is 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 air stream  103 , 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. 
 
     
     
         2 . The method of  claim 1 , wherein the cold liquid hydrogen stream  102  has a pressure greater than 40 bara. 
     
     
         3 . The method of  claim 1 , wherein the liquid oxygen stream  106  has a pressure greater than 30 bara. 
     
     
         4 . 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. 
 
     
     
         5 . The method of  claim 4 , wherein the cold hydrogen stream  102  has a pressure greater than 40 bara. 
     
     
         6 . The method of  claim 4 , wherein the liquid oxygen stream  106  has a pressure greater than 30 barn. 
     
     
         7 . 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. 
 
     
     
         8 . The method of  claim 7 , wherein the cold hydrogen stream  102  has a pressure greater than 40 bars. 
     
     
         9 . The method of  claim 7 , wherein the liquid oxygen stream  106  has a pressure greater than 30 barn.