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

Chemistry, explain elecrochemical series and give its applications

explain elecrochemical series and give its applications

Find out the heat loss, A 3.6-cm inside diameter stainless steel pipe is be...

A 3.6-cm inside diameter stainless steel pipe is being used to convey a liquid food. The inside convective heat-transfer coefficient is 10 J/s.m2. o C. The pipe is 0.5 cm thick and

External air tappings - aircraft engine , External air tappings: Engine...

External air tappings: Engines vary as to the number of external air tappings and their usage. The following notes are taken from the Pratt and Whitney JT9D but have been simp

Signal modulation, Signal modulation Modulation involves the modificati...

Signal modulation Modulation involves the modification of some property of a (usually sinusoidal) carrier waveform. The process of recovering the original signal from the modul

Aviation legislation - maximum take-off mass, Aviation legislation - MAXIMU...

Aviation legislation - MAXIMUM TAKE-OFF MASS: Aircraft companies intending to manufacture a new design must have approval under Chapter A8-1 of BCAR or JAR-21 (Certification Pr

The world of fiance, Answer the following questions: What are the three for...

Answer the following questions: What are the three forms of a business organization? What are the advantages and disadvantages of each form? For a corporation, what is the overall

Class a amplifier operation, Expertsmind.com brings you unique solution in...

Expertsmind.com brings you unique solution in electrical engineering Class A Amplifier Operation Class A amplifiers are biased so that variations in input signal polarit

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