Chapter 6, Problem 6.21P

2. thermodynamics

2. TA system consisting of 1 lb of water undergoes a power cycle composed of the following processes: Process 1-2: Isothermal expansion from a saturated liquid to a saturated vapor at p= 1000 lbf/in.² Process 2-3: Isochoric cooling to p3 = 100 lbf/in.² Process 3-4: Isobaric and isothermal compression Process 4-1: Isochoric heating | Sketch the cycle on a T-v diagram, and label the states. |Sketch the cycle on a p-v diagram, and label the states. I Complete the following chart for system properties at the various states: a. b. с. p (lbf/in.?) x (quality) v (ft'/lb) State 1 3 4 The net work of a cycle is given by the integral of p dV over the entire cycle. This means that the net work can be found by calculating the area enclosed by the cycle on a p-v diagram. Find the net work of this cycle in BTU by calculating the area enclosed by the cycle on your d. p-v diagram from part b (the values from part c might help).

: Air undergoes a three-process cycle. For 2 kg of air if the processes are: 1 → 2: constant temperature expansion .2 → 3: constant volume. 3 → 1: constant- pressure compression .The necessary information is T1 = 100°C, T3 = 600°C, and P1 = 200 kPa. R= 0.287 KJ/Kg.k , Cp= 1.051 KJ/Kg.k , Cv= 0.764 KJ/Kg.k.