In an ideal reheat cycle, steam is generated at 6.3 Mpa, 450 deg. C and partially expands to 0.84 Mpa. At this point, the steam is withdrawn and passed through a reheater. It re-enters the turbine at 0.84 Mpa and 480 deg. C. Complete expansion now occurs to the condenser pressure of 0.02 Mpa. Find the following: a. Enthalpies b. Total heat added and rejected c. Total turbine work and pump work d. Net cycle work e. Cycle efficiency and engine efficiency

Refrigerant-134a enters the compressor of a refrigerator as superheated vapor at 0.14 mpa and -10°c at a rate of 0.05 ka/s and leaves at 0.8 mpa and 50°c. the refrigerant is cooied in the condenser to 0.72 mpa and 26'c. it is then throttled to 0.15 mpa. sketch the t-s diagram for the system and evaluate: 6) the rate of heat removai from the refrigerated space (kw), it) the power input to the compressor (kw), ii) the isentropic efficiency of the compressor (%), and iv) the cop of the refrigerator.