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

Evacuation of a high rise building - means of escape, Evacuation of a high ...

Evacuation of a high rise building - means of escape: Evacuation of a high rise building is likely to be split into two or more phases.  Initially, when the alarm activates (f

Circuit, I am looking for a circuit similar to a schmitt trigger which use ...

I am looking for a circuit similar to a schmitt trigger which use a varying capacitive input and provided a varying frequency output.

Flight control - linear system, Representations of a linear system The ...

Representations of a linear system The linear system of Section is shown in block diagram To determine the responseof the output of the system y(t) to an input u(t) the initial

Fibre optics communications, explain the fibre optic communication system w...

explain the fibre optic communication system with block diagram

Aerodynamics-supercritical aerofoils, Design Features of Supercritical Aero...

Design Features of Supercritical Aerofoil • Blunt nose- rapid p pressure reduction around leading edge • Flat top- Reduce the flow acceleration on upper surface toreduc

Extractive metallurgy, differences between blast , reverbatory and electric...

differences between blast , reverbatory and electric furnaces

Heat transfer, A heat recovery device involves transferring energy from hot...

A heat recovery device involves transferring energy from hot flue gases passing counter currently through an annular region to pressurized water flowing through the inner tube of t

Inspecting a sprinkler systems, Inspecting a Sprinkler Systems: When i...

Inspecting a Sprinkler Systems: When inspecting a building that has sprinklers fitted it is not easy to check that the correct water pressure and flow rate can be achieved by

Thermodynamics of materials, outline five (5) areas where thermodynamics ca...

outline five (5) areas where thermodynamics can be applied in materials engineering

Interlaminar shear strength , Composites have low shear strengths compared ...

Composites have low shear strengths compared to longitudinal strengths. The ILSS test is a simple 3 point bend test, requiring a small amount of material. A span to depth ratio

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