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

Blasting, Students are to undertake a tunnel blast design for the following...

Students are to undertake a tunnel blast design for the following conditions: • Tunnel is 5.5m wide by 5.5.m high • Rock is a granite with a UCS of 300 MPa • Drill hole diameter is

Blow hole and pin hole porosity, Blow Holes                    (i) Exc...

Blow Holes                    (i) Excessive moisture in the moulding sand.                   (ii) Low permeability and excessive fine grain sands.                   (iii

Simulation, A system is a walk-in medical clinic; a simulation is used to d...

A system is a walk-in medical clinic; a simulation is used to determine staffing levels. Under what circumstances would it be appropriate to use a terminating simulation or a stead

Human Motion Kinetics, Beginning from rest when theta=10 degrees, a 30-kg c...

Beginning from rest when theta=10 degrees, a 30-kg child slides without kinetic friction down the slide which is in the shape of a 2.5 meter circular arc. Determine the child''s sp

Tools, . An engineering department chair wants to maximize the use of scho...

. An engineering department chair wants to maximize the use of scholarship dollars to shape the enrollment of the incoming freshmen. All applicants take an engineering aptitude t

Semi conductor devices, mobility and conductivity

mobility and conductivity

Java, 2. Differentiate between stream oriented and data gram oriented socke...

2. Differentiate between stream oriented and data gram oriented socket in java?

Imaging seekers , Imaging Seekers  Although there are a wide variety...

Imaging Seekers  Although there are a wide variety of imaging sensors (cameras), the majority of modern aircraft systems are based on conventional TV camera technologies (al

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

Cylindrical shaft, theories about cylindrical shaft

theories about cylindrical shaft

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