{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

mech3020-s11-hw03

# mech3020-s11-hw03 - K Both the compressor and the turbine...

This preview shows page 1. Sign up to view the full content.

MECH 3020 Thermodynamics II: Homework set #3, Due 1/31 1. A simple gas turbine cycle has inlet conditions of 300 K and 1 atm. The pressure ratio is r P = P 2 /P 1 = 8, and the heat addition, per unit mass, is q H = 1200 kJ/kg. Both the turbine and the compressor are isentropic. (a) Assuming constant speciﬁc heats, with values taken at room temperature, calculate the temper- ature at the compressor exit, the combustor exit and the turbine exit, the thermal eﬃciency, and the net work per unit mass. (b) Repeat the previous problem, except now use the air tables. 2. A simple gas turbine cycle has inlet conditions of 300 K, 1 atm, and a maximum temperature of 2000
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: K. Both the compressor and the turbine can be considered ideal. Find the minimum mass ﬂow rate, and associated pressure ratio, necessary for the turbine to produce a power output of 2 MW. 3. Consider problem 1), with the same r P and q H . Say that the turbine and the compressor have equal isentropic eﬃciencies of η c = η t . Assuming constant speciﬁc heats, calculate and plot the thermal eﬃciency of the cycle as a function of η c ranging from 1 (isentropic behavior) downwards. What value of η c results in zero thermal eﬃciency for the cycle? 1...
View Full Document

{[ snackBarMessage ]}

Ask a homework question - tutors are online