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

Fire safety management for clubs, Fire safety management for clubs: In...

Fire safety management for clubs: In clubs and other places where there is music being played, or other entertainment, it is important that the music (or other entertainment)

Edgewise compression test on a sandwich structure , This test gives a basis...

This test gives a basis for evaluating the load-bearing capability of a sandwich structure when loaded in compression. The specimen should be at least 50 mm wide and the length sho

What is ebidta?, What Is EBIDTA?  EBITDA appears for income before atten...

What Is EBIDTA?  EBITDA appears for income before attention, taxation, devaluation, and amount. EBITDA came into large use among personal investment companies, seeking to determ

Aerofoil aerodynamics , We now have some idea about what models are availab...

We now have some idea about what models are available to simulate the flow over an aerofoil, and also how to use the Hanley package to apply these methods. Keep referring to you

Use of a microprocessor and a microcontroller, Question: a) Differenti...

Question: a) Differentiate between the prime use of a microprocessor and a microcontroller. b) Describe why the design approach of the microcontroller must mirror that of t

#title.welding., Does the atmospheric pressure inside of a tube aproximatel...

Does the atmospheric pressure inside of a tube aproximately a half an inch in diameter cause resistance against an end plug being flash welded to the end of it and what would be th

Enhancement mode mosfet, ENHANCEMENT MODE MOSFET In the enhancement-mod...

ENHANCEMENT MODE MOSFET In the enhancement-mode type, the gate must be forward biased to produce charge carriers in the channel. These devices are normally of and do not condu

VLSI, what is meant by VMOS

what is meant by VMOS

Topic Drilling Fluid Fundamentals, Read the titled books Drilling Fluid Eng...

Read the titled books Drilling Fluid Engineering Manual. Textbook prepared by M-I Drilling Fluids Co.,1998; Halliburton Cementing Tables. Casing and cement data tables prepared by

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