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

Aviation legislation - permit to fly, PERMIT TO FLY A Permit to Fly may...

PERMIT TO FLY A Permit to Fly may be issued to an aircraft that does not, for a variety of reasons, fully comply for a Certificate of Airworthiness. These reasons might be b

Found ash content, determine the ash content in given sample

determine the ash content in given sample

Project, list 10 major project topic in agricultural engineering

list 10 major project topic in agricultural engineering

Financial Ratio, The following information was extracted from the accountin...

The following information was extracted from the accounting records of De Walt Company as at 28 February 2011 (the end of their financial year): Sales (50% on credit) 1 400 000 Cos

Java, 2. Differentiate between stream oriented and data gram oriented socke...

2. Differentiate between stream oriented and data gram oriented socket in java?

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

Cell arrays matlab, Expertsmind.com offers  Cell Arrays matlab assignment ...

Expertsmind.com offers  Cell Arrays matlab assignment help In matlab, Cell arrays are just like frequent arrays in that they are "indexed" details of information, with an out

Siliconizing, 1.defination 2.explain the mechanisms of each process. 3. exp...

1.defination 2.explain the mechanisms of each process. 3. explain in detail how many types of each process 4. advantages 5. disadvantages

EMI, explain ramp type

explain ramp type

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