| 摘要 |
A method of producing a liquid product stream, for example, a liquid nitrogen product stream (12), at a production rate that is selectively varied. This variation is produced in either a waste expansion or air expansion process by increasing the pressure and flow rate of the feed stream (10) during periods in which a high rate of liquid production is desired without substantially increasing the pressure of the exhaust stream produced by a variable speed turboexpander (64, 78). This increases the expansion ratio across the turboexpander and therefore the refrigeration supplied to increase liquid production At the same time, the increase in flow rate prevents a decrease in the performance of the variable speed turboexpander. |
