초록 ▼

A method of liquefying a permanent gas stream, includes the steps of reducing the temperature of the permanent gas stream at elevated pressure to below its critical pressure and performing at least two working fluid cycles to provide at least part of the refrigeration necessary to reduce the tempera

A method of liquefying a permanent gas stream, includes the steps of reducing the temperature of the permanent gas stream at elevated pressure to below its critical pressure and performing at least two working fluid cycles to provide at least part of the refrigeration necessary to reduce the temperature of the permanent gas to below its critical temperature. Each working fluid cycle comprises work-expanding the cooled working fluid in countercurrent heat exchange with the permanent gas stream and with the working fluid being cooled, refrigeration thereby being provided for the permanent gas stream. In at least one working fluid cycle, work-expanded working fluid is brought into countercurrent heat exchange relationship with the permanent gas stream at a temperature below the critical temperature of the permanent gas and in the or each such cycle on completion of the work expansion the working fluid is at a pressure of at least 10 atmospheres.

대표청구항 ▼

In a method providing refrigeration to liquify a permanent gas stream, including the steps of reducing the temperature of the permanent gas stream at elevated pressure to below its critical temperature, and performing at least two working fluid cycles to provide at least part of the refrigeration ne

In a method providing refrigeration to liquify a permanent gas stream, including the steps of reducing the temperature of the permanent gas stream at elevated pressure to below its critical temperature, and performing at least two working fluid cycles to provide at least part of the refrigeration necessary to reduce the temperature of the permanent gas to below its critical temperature, each such working fluid cycle comprising compressing the working fluid, cooling it, work expanding the cooled working fluid, and warming the work expanded working fluid in countercurrent heat exchange with the permanent gas stream, refrigeration thereby being provided for the permanent gas stream, the improvement comprising, the condition that the working fluid is at a pressure of at least 10 atmospheres on completion of each working fluid cycle in which the working fluid is brought into countercurrent heat exchange relationship with the permanent gas stream at a temperature of the working fluid below the critical temperature of the permanent gas.