User Account

All Pages

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

Fuel control in aircraft engine, Fuel control in Aircraft Engine: ...

Fuel control in Aircraft Engine: The basic fuel system is comprised of a fuel pump that receives low-pressure fuel from the aircraft fuel tank via a low pressure fuel valv

Coil, explain coil ?

explain coil ?

Guidance control system, Guidance Control system The control aspect...

Guidance Control system The control aspect of the guidance system is intended to stabilise the behaviour of the airframe.  The fact that the guidance system will always h

External cooling -aircraft engine , External cooling Cooling of the ext...

External cooling Cooling of the external skin of an aero-engine is achieved by suitable design of the aircraft airframe; the layout will depend upon where the engine is fitted

Priority scheduling- operating system, Operating System Assignment# Priorit...

Operating System Assignment# Priority Scheduling leads to the risk of starvation: a process is ready, but never is given the processor. Some preemptive priority schedulers therefor

Civil construction, what a problem when we do a construction project

what a problem when we do a construction project

Materials, Why Industries that manufacture racing cars prefers nickel based...

Why Industries that manufacture racing cars prefers nickel based alloys for engine components and iron based alloys for structural parts?

Procedures for starting and ground running of aircraft , Procedures for sta...

Procedures for starting and ground running: Before starting and ground running any gas turbine powered aircraft, several considerations must be taken into account. The first an

Energy bands, variation of energy bands with alloy composition

variation of energy bands with alloy composition

Identify people at risk - fire risk assessment, Identify people at risk: ...

Identify people at risk: It is often easy to forget that there may be people in a building who cannot move as quickly as the rest of us.  They may be in a wheel chair, they ma

Write Your Message!

Captcha
Order Assignment

Featured Services

Order Now

Popular Subjects

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!

Submit Assignment

Academics

Major Subjects

Majors

Get In Touch

whatsapp: +91-977-207-8620

Phone: +91-977-207-8620

Email: [email protected]

TERMS & POLICIES

HELP & SUPPORT

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd