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

Explain the height adjustment and extension of augers, Normal 0 ...

Normal 0 false false false EN-IN X-NONE X-NONE MicrosoftInternetExplorer4

Wall thickness tank, What must be thickness of Wall tank: ASTM 285 C, const...

What must be thickness of Wall tank: ASTM 285 C, construction material. 15.75 ft diameter 18.0 ft length Wall length down cone =10.4 ft length top cone = 8.3 ft Operation pressur

Compression ratio and mean effective pressure, Compressio n Ratio: It...

Compressio n Ratio: It is calculated as shown below Mea n Effective Pressure (P m   o r P me f ): Mean effective pressure is the hypothetical consta

Austempering, Austempering: The component to be hardened is initialy ...

Austempering: The component to be hardened is initialy austenised and after that quenched into a lead or salt bath held at just over the martensite transformation temperature

Metallurgy of electron beam welding, Metallurgy of Electron Beam Welding ...

Metallurgy of Electron Beam Welding EBW is capable of joining a variety of materials in a broader thickness range than any other fusion welding process. This is being in

Determine the width and depth of the beam, Determine the width and depth of...

Determine the width and depth of the beam: A timber beam of rectangular section is only supported over a span of 5 m. It carries an uniformly distributed load of 15 kN/m over

THERMODYNAMICS, COMPRESSOR MOSTLY USED FOR SUPERHEATING OF IC ENGINES IS CA...

COMPRESSOR MOSTLY USED FOR SUPERHEATING OF IC ENGINES IS CALLED ----------COMPRESSORS

#title.cutting tool life, what is relation between tool life and cutting sp...

what is relation between tool life and cutting speed?

Belt tension for v-belt, Belt tension for V-belt: What is V-belt. Dri...

Belt tension for V-belt: What is V-belt. Drive expression of Ratio in belt tension for V-belt Sol: The power from one shaft to the other shaft can be transmitted with t

Machin of dynamics, Ask question Prove maximum fluctuation of energy ?E=2EC...

Ask question Prove maximum fluctuation of energy ?E=2ECS.

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