The ph diagram (Sec. 10.2.4) used in the refrigeration
Chapter 11, Problem 11.2D(choose chapter or problem)
The p–h diagram (Sec. 10.2.4) used in the refrigeration engineering field has specific enthalpy and the natural logarithm of pressure as coordinates. Inspection of such a diagram suggests that in portions of the vapor region constant-entropy lines are nearly linear, and thus the relation between h, ln p and s might be expressible there as
\(h(s, p)=(\mathrm{A} s+\mathrm{B}) \ln p+(\mathrm{C} s+\mathrm{D})\)
Investigate the viability of this expression for pressure ranging up to 10 bar, using data for Refrigerant 134a. Summarize your conclusions in a memorandum.
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