Thermodynamics, turbine engine, Mechanical Engineering

Assignment Help:
The attached figure depicts an indirectly fired gas turbine engine. In the gas turbine engine, air is
compressed to a high pressure and then heat is added. The high pressure, high temperature air is then
expanded through a turbine with power being extracted. To a first approximation, the compressor and
turbine may be treated as adiabatic. In a typical gas turbine, the fuel is added to the air and combusted
and it is actually the combustion products that pass through the turbine. In the indirectly fired turbine,
as is used in this problem, the air is heated with a heat exchanger which allows heat sources that could
otherwise not be used (e.g. solar, coal, etc.). The net work out of the gas turbine engine is the work out
of the turbine less the work into the compressor. In a real engine these devices are normally all coupled
on a common shaft.
Since the work of compression decreases the net work out, anything you can do to decrease the
compression work will increase the net work out. One way to do that is to cool the air being
compressed. The attached diagram shows a proposed system where the compression is divided into
two stages and liquid water is sprayed into the air to cool it between the two stages. It is proposed that
this approach will increase power output and increase efficiency. Your task is to determine if this
approach is thermodynamically feasible. You may neglect the pressure drops between components and
within the heat exchanger and you may neglect kinetic energy. The following design parameters are
provided. For these design parameters, determine the effect of the water spray on efficiency (net work
out divided by heat input) and net power out per kg/s of dry air coming into the turbine. Do this for a
range of water spray inputs from 0 up to the amount required to achieve 70% relative humidity at point
3.
Point 1
T= _20C______
P= _0.85 bar______
Ø = __50%_____
Point 2
P= __3.5 bar_____
Point 3
P= ___10.0 bar_____
Point 4
T=__1220K_______
Point 5
P= P1
Compressor A: ?isen = __0.87___ Compressor B: ?isen = _0.83____ Compressor C: ?isen = __0.93

Related Discussions:- Thermodynamics, turbine engine

Concept of torque speed variation in transmission system , Concept of Torqu...

Concept of Torque (Speed) Variation in Transmission System: When two different size gears are running at same speed, then the small gear makes more revolution than the big gear. T

Initial tension in the belt, Initia l Tension in The Belt: Let T o =...

Initia l Tension in The Belt: Let T o = initial tension in belt T 1  = Tension in tight side T 2  = Tension in slack side T C  = Centrifugal Tension in belt T

THEORY OF MACHINES., AskThe spring controlled governor of the Hartung type ...

AskThe spring controlled governor of the Hartung type has two rotating masses each of 2.5 kg and the limits of their radius of rotation are 100 mm and 125 mm. The each mass is dire

Explain about active fire protection, Q. Explain about Active Fire Protecti...

Q. Explain about Active Fire Protection? Active Fire Protection - A fire fighting system that is normally dormant and is activated automatically upon detection of a fire hazard

Calculate critical speed of shaft, The rotor of a turbo charged having mass...

The rotor of a turbo charged having mass of 10 Kg is keyed to the centre of 25 mm diameter of steel shaft of 400 mm between bearings. Calculate : (i) Critical speed of shaft.

How do we calculate the productivity, Describe productivity. How do we calc...

Describe productivity. How do we calculate the productivity? Enumerate various factors effecting the productivity. Define various ways for the improvement of productivity.

Describe elastic and plastic deformation, Q. Describe Elastic and plastic d...

Q. Describe Elastic and plastic deformation? When a sufficient load is applied to a metal or other structural material, it will cause the material to change shape. This chang

Determine the shape of the beam, Determine the shape of the beam: A si...

Determine the shape of the beam: A simply supported beam of span l carries a concentrated load P at midspan. If the beam is to be a beam of consistent strength, determine the

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