problem_set5 - 10.40 Thermodynamics Problem Set 5 Fall 2003...

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10.40 Thermodynamics Fall 2003 P r o b l e m S e t 5 1. Let’s compare the pressure-temperature behavior of two important expansion processes that are used for refrigeration and cooling applications: (i) expansion across a Joule-Thompson valve (ii) expansion in an adiabatic turbine To carryout this comparison it is helpful to construct an equation to express the ratio of how temperature varies with pressure for each process. Defining this ratio as follows: () () (/) (/) process i process ii TP TP α ∂∂ We will also need to specify the type of fluid to be expanded. To keep things simple, let’s limit our analysis to pure CO 2 which can be represented by four constitutive property models whose accuracy will depend on the PVT region where the expansion is carried out. The four models are: (1) ideal gas (2) The Law of Corresponding States (Hint: Express α in terms of Z and its derivatives) (3) PR EOS
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This note was uploaded on 11/27/2011 for the course CHEMICAL E 20.410j taught by Professor Rogerd.kamm during the Spring '03 term at MIT.

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problem_set5 - 10.40 Thermodynamics Problem Set 5 Fall 2003...

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