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

Outcomes of the fra - fire protection engineering, Outcomes of the FRA: ...

Outcomes of the FRA: When interpreting the outcomes of the FRA, NFPA 551 states that there are two ways in which the situation can be assessed to determine if it is acceptable

Analog digital converter , Analog digital converter  Analog digital con...

Analog digital converter  Analog digital converter digitises the conditioned signal and presents it in a digital form, which is more convenient for long distance transmission,

Basic engine design considerations, BASIC ENGINE DESIGN CONSIDERATIONS ...

BASIC ENGINE DESIGN CONSIDERATIONS Effect of engine size: The two parameters involved are the diameter, d and stroke, L of the engine. The effect of doubling each of this

Embedded system, need it in 10 days time and in Australian cods if there is...

need it in 10 days time and in Australian cods if there is

Composite materials - approximate stability equatation, Most vehicles have ...

Most vehicles have the XZ plane as a plane of symmetry which results in D = 0 and F = 0. Further if the disturbance velociies are small then terms proportional to the square and pr

Adder /subtractor, operation of adder/subtraction by using truthtable

operation of adder/subtraction by using truthtable

Matlab, how to use mean and standard deviation with matlab?

how to use mean and standard deviation with matlab?

Gravity die casting , Gravity Die Casting  In PERMANENT MOULD CASTING, ...

Gravity Die Casting  In PERMANENT MOULD CASTING, molten metal is poured under gravity into a metal mould where it remains until it solidifies. The mould is then opened and the

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