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

Oil tank- aircraft engine, Oil tank: The oil tank is usually mounted on...

Oil tank: The oil tank is usually mounted on the engine; it may be a separate unit or part of an external gearbox called the sump. It has provision to allow the system to be f

Mine Drainage Task, The purpose of this project is to design a pipeline and...

The purpose of this project is to design a pipeline and pumping system to dewater a mine. The production level is 500m below surface. Ore is fed through crusher chambers to the tra

4 bit comparator, process / description.. if I put A=1000 and B=0100 A>B ga...

process / description.. if I put A=1000 and B=0100 A>B gate will show output 1 and dose A

Match plate patterns, Match plate patterns are used where a rapid producti...

Match plate patterns are used where a rapid production of small and accurate castings is desired on a large scale. These patterns find a great favour in machine moulding. Their co

Plastics, what are the key polymeric structural features to most elastomer...

what are the key polymeric structural features to most elastomeric material

Net working capital, Net working capital In computing net cash flows in th...

Net working capital In computing net cash flows in the above example, we have assumed that all revenues are received in cash and all expenses are paid in cash. In reality, the act

Theory of solar system, Expertsmind.com brings you unique solution in ele...

Expertsmind.com brings you unique solution in electrical engineering Define terms of Galaxy Clusters, Basic Astronomical Objects, Astronomical Distance Units, Terms

Caselet- 2, suggestion regarding credit limit. should it be approved or not...

suggestion regarding credit limit. should it be approved or not what should be the amount of

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