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cookie85
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Homework Statement
Can anyone help on the below? I have been working on this for days and still can't find the solutions?!?
Homework Equations
Steam ar 40 bar and 400C enters the high pressure turbine of a steam power plant at a rate of 20kg/s and explands to a pressure of 3 bar at which point it is just dry saturated. at this point part of the steam is re heated to 400C and then expands in the low pressure turbine to a condenser pressure of 0.05 bar with an isentropic efficiency of 88%. the remainder passes directly to asingle 'open' feed heater. the water leaving the condenser is raised to the feed heater pressure which it enters at a temp of 50C
1) Draw a schematic diagram of the plant and a corredponding cycle diagram on a temperature-entropy axes
2) neglecting feed pump work inputs, find:
a) the mass flow rates of steam and water entering the feed heater
b) the plnats power output and heat input
c) the plants thermal efficiency
A gas turbine plant is fuelled by Methane,. After compresssion the air and fuel enter the combustion chamber at a temp of 600K and excess air is supplied in order to limit the temp of the combustion products to 1200K after steady flow, adiabatic combustion.
1) Illustrate the combustion process on a temp-enthalpy axes (have got this question right i believe but wouldn't hurt to double check my graph)
2) Find the volumetric air-fuel-ratio used
3) What air-fuel-ratio would be required to achieve the maximum temp of the combustion products?