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

FISICA, EL DESPLAZAMEINTO DE UNA PARTICULA ESTA DADO POR S=(-2+3T)e¨-0.5t

EL DESPLAZAMEINTO DE UNA PARTICULA ESTA DADO POR S=(-2+3T)e¨-0.5t

Engineering physics, Consider a conical pendulum with a bob of mass m=80kg ...

Consider a conical pendulum with a bob of mass m=80kg on a string of length L=10 m that makes an angle of 5 deg. with the vertical. Determine the horizontal and vertical component

Need help with a financial management quiz, Would you be able to assit me w...

Would you be able to assit me with a 40 question, multiple chioice quiz today ?

Calculate percent gain, Assume you invest $150 per month in a stock. Stock ...

Assume you invest $150 per month in a stock. Stock prices are as follows: January $10.50, February $9.75, March $9.50, April $11.00, May $10.75, June $9.75, July $9.00, August $8.5

Function, what is function independence.on software engineering

what is function independence.on software engineering

Riveting, Riveting  is a fixed fastening procedure in which the end of the ...

Riveting  is a fixed fastening procedure in which the end of the metal pin is pressed over or spread out by hammering operation. Wrought iron and steel are used for the riveting an

Internal rate of return irr, Internal rate of return IRR In case of IRR met...

Internal rate of return IRR In case of IRR method cash flow are analyzed taking into account the magnitude and the timing. IRR is that discount rate which gives a net present value

Problem Set, 1) An investment project requires a net investment of $100,000...

1) An investment project requires a net investment of $100,000. The project is expected to generate annual net cash flows of $28,000 for the next 5 years. The firm''''''''s cost of

Computational aerodynamics-guided reading, It is recommended that if possib...

It is recommended that if possible you should buy a copy of this book. It will prove useful for the new fourth year configurational aerodynamics module also. Blackwells bookshop ha

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