ME 2334 Chapter : Chapter 9 Notes
Document Summary
Chapter 9 (cid:149) the rankine cycle, steam power plant (cid:149) reheat cycle (cid:149) feedwater heaters. Comments to individual processes assuming (p3, t3, t1) determines cycle. Pump: wp = h2 h1 ; s2 = s1 => state 2: (p2 = p3, s = s1) Difficult to interpolate in table b. 1, use incompressibility to find work. If state 4 is two-phase (s4 < sg) find x4 and then h4. Standard assumptions: x1 = 0 and x3 = 1. Cycle is two p = c and two s = c processes, resembles the carnot cycle (two t = c instead of p = c). 2 assumptions = 2 parameters, (p3 = p2 and t1). If superheat then 3 parameters (p3, t3, t1). Process analysis with energy and entropy equations, all w and q are made positive by knowing the direction of the transfer, no kinetic or potential energy changes. Pump 1-2: 0 = h1 h2 + wp.
