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

Bme, advantages and disadvantages oh hot and cold die working in the subjec...

advantages and disadvantages oh hot and cold die working in the subject of basic mechanical engineering

Tools, . An engineering department chair wants to maximize the use of scho...

. An engineering department chair wants to maximize the use of scholarship dollars to shape the enrollment of the incoming freshmen. All applicants take an engineering aptitude t

Computational aerodynamics-module style, The module content and teaching st...

The module content and teaching style has undergone revision since 2006-07. There are two reasons for this. First, this was the first year that Prof Badcock was responsible for the

#title.MARKET VALUE WEIGHT OF EQUITY., AAA has 1,000,000 shares of common s...

AAA has 1,000,000 shares of common stock trading at $20.00 per share. The company''s debt consists of 2,000 $1,000 par value 10-year 7.0% annual coupon bonds with semiannual paymen

Engine controls - aircraft engine, Engine controls: Engine controls are...

Engine controls: Engine controls are very similar to flying controls, and the same types of equipment are used, such as rods, bellcranks and cables. Most control systems use ei

Engineering economic analysis definition, Introduction Engineering Econ...

Introduction Engineering Economic Analysis Definition: using a combination of quantitative and qualitative techniques to analyze economic differences among engineering design a

Illustrate flat plate collectors. Describe liquid fl, Illustrate flat plate...

Illustrate flat plate collectors. Describe liquid flat plate collector with relevant diagram.

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