An ideal gas turbine (Brayton cycle) has a net power output of 100 kW. The working medium is air with T1=30°C, T3 = 750°C, and T4 = 300 °C. Determine

(A) The compressor pressure ratio,

(b) The compressor work (kj/kg),

(c) The mass flow rate of air (kg/s)

(d) The thermal efficiency.

Solution:

a) 

b) 

c) 

d) 

A gas turbine power plant operates with maximum temperature of 1500⁰C,

while the ambient air temperature is 28⁰C. If specific heat ratio is 1.4 and pressure ratio is 15, find the following:

Turbine work Compressor work Power plant net output work Heat input Thermal efficiency

A gas turbine power plant with a pressure ratio of 20:1 consumes 6.2 kg/s of 48MJ/kg methane. If specific heat ratio is 1.5 calculate the output power of this plant.