Methane Is Liquefied In A Simple Linde System As Shown In The Figure Below The Methane Enters The Compressor At 1 Bar 1 (55.68 KiB) Viewed 36 times
Methane is liquefied in a simple Linde system, as shown in the Figure below. The methane enters the compressor at 1 bar and 300 K, and after compression to 60 bar, it is cooled back to 300 K. The product is saturated liquid methane at 1 bar. The un-liquefied methane, also at 1bar, is returned through a heat exchanger, where it is heated to 295 K by the highpressure methane. A heat leak into the heat exchanger of 5 kJ is assumed for each kilogram of methane entering the compressor. Heat leaks to other parts of the liquefier are assumed to be negligible, and the surrounding temperature is 300 K. Figure 1. Linde liquefaction system
The basis of all calculations is 1 kg of methane entering the process, and all rates are expressed on this basis. Furthermore, 4.86% of methane is liquefied in this process. The properties at the various key points of the process given in the table below. Table 1. Properties at the various key points of the process Project tasks: Make a thermodynamic analysis of the above process. For the thermodynamic analysis, perform the following tasks: a) Present the process description. b) Calculate amounts of methane liquefied and un-liquefied. c) Complete energy balance analyses based on the individual units and the whole process. d) Complete entropy generation analysis for the process. e) Outline and discuss process improvements from an energy-saving, thermodynamic efficiency, and entropy generation standpoint.
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