index(2)

index(2) - Using the appendix B tables Revised Contents 1...

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Unformatted text preview: Using the appendix B tables Revised 5/4/04 Contents 1 Overview 1 2 Bare Tv- and pv-diagrams 1 2.1 The bare Tv-diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 2.2 The bare pv-diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 3 Isolines 2 3.1 Some isolines in the Tv-diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 3.2 Some isolines in the pv-diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 4 Table dimensionality 4 5 Determining the phase 5 5.1 Phase from p and T in the Tv-diagram (broken line first) . . . . . . . . . . . . . . . . . . . . . 5 5.2 Phase from p and T in the pv-diagram (broken line first) . . . . . . . . . . . . . . . . . . . . . . 9 5.3 Phase from p and T in the Tv-diagram (straight line first) . . . . . . . . . . . . . . . . . . . . . 11 5.4 Phase from p and T in the pv-diagram (straight line first) . . . . . . . . . . . . . . . . . . . . . 13 5.5 Phase from p and v . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 5.6 Phase from T and v . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 5.7 Phase from T and x . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 5.8 Phase from p and x . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 1 5.9 A common theme . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 5.10 Other cases . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 6 The Ts-diagram and isentropes 20 1 Overview The tables in Appendix B of the book 1 allow you to figure out the intensive variables, p , T , v , x (if defined), . . . , of various substances (water, amonia, methane, nitrogen, refrigerants). The generic problem is: given any two of the intensive variables of a substance, figure out any other intensive variables you need. Unfortunately, the table to use depends not just on the substance, but also on the phase it is in (when the substance is in vapor form you must a different table than if it is in liquid form, for example.) And to figure out the phase, you need to understand and use either the pv- or the Tv-diagram, as explained in the next section. 2 Bare T v- and pv-diagrams 2.1 The bare Tv-diagram The generic shape of a bare Tv-diagram is shown below: The vertical axis represents the temperature T , while the horizontal axis represents the specific volume v . Each point in the graph represents one particular state of the substance, with the point’s height giving the temperature and the point’s horizontal position the specific volume....
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This note was uploaded on 07/09/2011 for the course EGN 5456 taught by Professor Dommelen during the Spring '09 term at FSU.

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index(2) - Using the appendix B tables Revised Contents 1...

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