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

Logic gate -xor gate, 'Exclusive or' gate: The basic OR gate illustrate...

'Exclusive or' gate: The basic OR gate illustrated previously in Figure 3 was seen to include the AND operation in that its output will adopt the 1 state not only when either i

Scr, briefly explain the switching characteristics of SCR

briefly explain the switching characteristics of SCR

Organic, What happened when melonic acid heated

What happened when melonic acid heated

Mode ii interlaminar fracture , The Mode II fracture toughness is measured ...

The Mode II fracture toughness is measured using the ENF  Typically, the specimen length is 120 mm, the width B is 20 mm, the thickness is between 3 and 5 mm and the distance be

Mine Surveying.., Question 1 (100 marks) As Surveyor in charge of an underg...

Question 1 (100 marks) As Surveyor in charge of an underground mine you have been instructed to design a tunnel to join a crosscut to a haulage drive. The details of the crosscut a

Invalidation of certificate of airworthiness, INVALIDATION OF CERTIFICATE O...

INVALIDATION OF CERTIFICATE OF AIRWORTHINESS Listed below are the four major reasons why a Certificate of Airworthiness could become invalid. There may be other specific reason

Double pipe condenser, what is the meaning of water out?

what is the meaning of water out?

Lean enterprise, a department manufactures a produt using a kanban system. ...

a department manufactures a produt using a kanban system. data is demand/hr= 30, container size= 5, unit processing time= 1.25 min. find the minimum number of kanban assuming reple

Further evaluation in the use of ultrasonic and ECT sensor, proposal of the...

proposal of the dissertation topic

Microbiology, Explain the following observations: cells of Escherichia coli...

Explain the following observations: cells of Escherichia coli fermenting glucose grow faster when NO3 - is supplied to the culture and then grow even faster when the culture is hig

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: +1-415-670-9521

Phone: +1-415-670-9521

Email: [email protected]

TERMS & POLICIES

HELP & SUPPORT

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