Chapter 9, Problem 9.110EP

Н.W A smaller power plant produces steam at 3 MPa, 600•C, in the boiler. It keeps the condenser at 45 C by the transfer of 10MW out as heat transfer. The first turbine section expands to 500 kPa, and then flow is reheated followed by the expansion in the low-pressure turbine. Find the reheat temperature so that the turbine output is saturated vapor. For this reheat, find the total turbine power output and the boiler heat transfer. [Answer. (Reheat temperature= 529°C , total turbine power output= 6487 kW, the boiler heat transfer= 16 475 kW)]

Find the COP of the simple vapor compression refrigeration cycle R-134a. The evaporation temperature is -5 ° C and the condenser temperature is 30 ° C. COP ?

Indicate TS- Diagram and Use SI unit Steam Table In a steam power plant that uses reheat cycle steam at 15.5 MPa, 545 °C enters the engine and expands to 1.95 MPa. At this point the steam is withdrawn and passes through a reheater. It reenters the engine at 535 °C. Expansions now occur to the condenser pressure of 0.0035 MPa. Find the efficiency in %.