Thermodynamics, engineering, Other Engineering

Assignment Help:
A methane-fired microturbine based on the regenerative gas turbine cycle employs a centrifugal compressor with a polytropic efficiency of 85%, a radial inflow turbine with a polytropic efficiency of 87% and a recuperator with an effectiveness of 0.75. The pres-sure loss is 10% divided equally between the high- and low-pressure sides. To avoid the use of exotic materials in the hot section, the combustor was limited to an equiva-lence ratio of 0.2, with a resulting combustor exit temperature of 1200K when the com-pressor inlet temperature is 298K. The working fluid can be assumed to be air with k = 1.4 with a cp = 1.025 kJ/kg-K in the compressor, 1.050 kJ/kg-K on both sides of the re-cuperator, and 1.075 kJ/kg-K in the combustor and turbine. The fuel is available as a gas at atmospheric pressure and 298K and must be pumped to a pressure that is 10% higher than the combustor exit pressure using a small compressor whose adiabatic efficiency is 60% (this is parasitic power to be subtracted from engine output). The specific heat, cp, of methane is 2.35 kJ/kg-K, and its k = 1.28. The combined mechanical and electrical efficiency of the turbine and the electric generator is 90%. If the compressor pressure ratio is 5:1, and the net power output is 500 kWe, compute the overall efficiency of the turbo-generator set, accounting for mechanical, electric and parasitic losses. Calculate the air and fuel flow rates under these conditions and estimate the exergy efficiency of the combustor, accounting for the methane pumping parasitic power.

Related Discussions:- Thermodynamics, engineering

Uses of iodoform, what is the role of iodoform in chemistry?

what is the role of iodoform in chemistry?

Integrated circuits, Integrated circuits: Integrated circuits, or IC's,...

Integrated circuits: Integrated circuits, or IC's, have changed the entire electronics industry. Before IC's were developed, all electronic circuits consisted of individual (d

Oscilloscope, Expertsmind.com brings you unique solution in electrical en...

Expertsmind.com brings you unique solution in electrical engineering   What is an Oscilloscope? An oscilloscope is a test instrument that displays a graph of voltage vers

Elastic and plastic deformation, Q. Define elastic and plastic deformation ...

Q. Define elastic and plastic deformation and differentiate between them. Ans. Elastic deformation : Elastic deformation is that part of the deformed material, when the

Mr Rhino, Which range will you select when measuring for 240ohms resistor?

Which range will you select when measuring for 240ohms resistor?

Riser design, A riser or a feeder head is a passage of sand made in the cop...

A riser or a feeder head is a passage of sand made in the cope to permit the molten metal to rise above the highest point in the casting after the mould cavity is filled up. Risers

Fuel control system in aircraft engine, Fuel control system in Aircraft Eng...

Fuel control system in Aircraft Engine: The computer controls the fuel flow to the engine to maintain a constant rotor RPM. During normal operation the optimum engine/rotor spe

Synchro resolvers for low load, Synchro resolvers for low load: Both tr...

Synchro resolvers for low load: Both transmitter and receiver rotors are energised by the same AC supply and will induce equal and opposing voltages in the stator coils provide

Npn and pnp, different operating modes of npn transistor

different operating modes of npn transistor

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd