(b) Liquefaction of Games

When a real gas which is initially at a temperature lower than the maximum inversion temperature is throttled, its temperature decreases. This principle is used by Linde in the Liquefaction of gases. Refer to figure 14.6 for understanding the operating cycle.

Figure 14.6

The gas is compressed to a high pressure and then cooled at constant pressure in a counter current heat exchanger with the cold gas which comes from the separator. The cooled gas is throttled to a low pressure. Thus some amount of gas is converted into the liquid phase. The two-phase mixture comes to the separator. The liquid is withdrawn and the cold gas is fed to the heat exchanger. Then the gas enters the compressor along with a fresh stream of make up gas for liquefaction.