Rankine cycle - thermodynamics, Mechanical Engineering

Assignment Help:

Rankine cycle - Thermodynamics:

The major problems of Carnot cycle is compressing very wet steam mixture from the condenser pressure up to boiler pressure. The trouble can be avoided by condensing steam in the condenser and then compressing the water in a comparatively small feed pump. The effect of modification is to make the cycle practical one. Further, far less work is required to pump liquid than to compress vapour and therefore this modification has the result that the feed pump's work is one or two per cent only of the work developed by turbine. We can thus neglect this term in our cycle analysis.

 

1566_Rankine cycle.png

The idealized cycle for simple steam power plant taking into account above modification is called as Rankine cycle shown in the figure given above. It is made from four practical processes:

2309_Rankine cycle1.png

(a) 1 - 2 :Heat is added to increase temperature of the high-pressure water up to its saturation value (process 1 to A). The water is evaporated at constant temperature and pressure (process A to 2). Both processes occur within boiler, but not all the heat supplied is at the maximum cycle temperature. Therefore, the mean temperature at which heat is supplied is lower than the equivalent Carnot cycle. Therefore, the basic steam cycle thermal efficiency is lower inherently. Applying first law of thermodynamics to this process.


Related Discussions:- Rankine cycle - thermodynamics

Plant layouts - layout design principles, Plant layouts shall provide for a...

Plant layouts shall provide for a maximum of safety and exposure protection from the spread of fire, with ease of operation and maintenance consistent with economical design. Requi

What do you mean by vibration, (a) What do you mean by vibration and the te...

(a) What do you mean by vibration and the terminology used in it to be defined? (b) A body is subjected to two Harmonic motions as provided below x 1 = 10 sin (wt + π/6) and x

How can you test hardness of the prepared mould, Q. How can you test hardne...

Q. How can you test hardness of the prepared mould? Hardness test: The hardness of the prepared mould surface is tested to check the ramming density of the sand. The instrume

Mechanical design calculations, Q. Mechanical Design Calculations? The ...

Q. Mechanical Design Calculations? The Mechanical Design Engineer/Specialist shall be responsible for mechanical design calculations that are required to ensure that the end pr

Bending equation, State and define the bending equation and mention it''s u...

State and define the bending equation and mention it''s units and derive it

What are the standards for product modeling, Standards for product modeling...

Standards for product modeling. The models include : (a)  A presentation model which defines the type of presentation of information. For instance how the product can be vi

Lubrication, what are the necessity of lubrication ?

what are the necessity of lubrication ?

Determine and illustrate about the earth pressure at rest, Determine and il...

Determine and illustrate about the earth pressure at rest. EARTH PRESSURE AT REST You have seen that the active pressure is the minimum lateral pressure while the passive pr

Hydraulic detention time, a.The closest point to discharge treated effluent...

a.The closest point to discharge treated effluent is a lake, but the pipeline is extended so it discharges into the river draining the lake. This allows a conventional secondary tr

High duty tool and die steels, High Duty Tool and Die Steels: High du...

High Duty Tool and Die Steels: High duty punching tools or dies are made out of a lot of various steels of fairly high alloying contents. High-carbon high-chromium die steel

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