Assignment No. 2
Name: ………………………………….…..
ID No. …………………………….
Course: POWER PLANT
Course Code: ME-460
ABET Outcome: a
Topics: Rankine cycle, Reheat cycle
and regenerative cycle
Q1. Steam at 30 bar and 5000C enter the steam turbine where it expand to the condenser pressure
of 0.1 bar. If the steam at the exit of the turbine is 93% dry, determine the following
a. Turbine efficiency
b. Rankine efficiency
c. Network per kg of steam
d. Work ratio.
Q2. A steam power plant works between 40 bar and 0.05 bar. If the steam supplied is dry saturated
and the cycle of operation is Rankine. Find (a) cycle efficiency, and (b) specific steam
consumption.
Q3. Steam at 28 bar and 50°C superheat is passed through a turbine and expanded to a pressure
where the steam is dry and saturated. It is then reheated at constant pressure to its original
temperature and then expanded to the condenser pressure of 0.2 bar. The expansion being
isentropic, find
(i) Work done per kg of steam
(ii) Thermal efficiency with and without reheats.
Q4. A steam power plant, operating with one regenerative feed water heating is run at the initial
steam conditions of 35.0 bar and 450°C with exhaust pressure of 0.04 bar. Steam is bled from
the turbine for feed water heating at a pressure of 1.0 bar. Determine
(1) Thermal efficiency of the cycle
(2) Economy percentage compared with the cycle of a simple condensing power plant.