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

Working capital, 5. From the following details you are required to make an ...

5. From the following details you are required to make an assessment of the average amount of working capital requirement of Hindustan Ltd. Particulars Average period of credit E

Drafting, what employment options are available in drafting

what employment options are available in drafting

Water treatment plant , i need to design a water treatment plant with raw w...

i need to design a water treatment plant with raw water entering ph of 10 and needs to have a ph of 7 when leaving the treatment process the rate of flow 260lt/sec

Principles of suveying, the true length of a line is known to be 500m.the ...

the true length of a line is known to be 500m.the line was again measured with a 20m tape and found to be 502m,what is the correct length of the 20m tape.

Aad instruction, Ask question #Minimum 100 words acexplanation of aad with ...

Ask question #Minimum 100 words acexplanation of aad with examplescepted#

Image orthicon camera tube, What are the disadvantages of Image Orthicon Ca...

What are the disadvantages of Image Orthicon Camera tube

Static electricity in aircraft, Static electricity in aircraft: As ment...

Static electricity in aircraft: As mentioned earlier, the effects of static electricity are of considerable importance in the design of aircraft and aircraft equipment. An air

Diffuser action-aircraft maintance, Diffuser action: The flare, which i...

Diffuser action: The flare, which increases the area of the duct, is known as a diffuser and its shape determines the rate of compression and the amount by which the air is com

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