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

Clutch-free pedal play -factors in clutch design , Clutch-free Pedal Play :...

Clutch-free Pedal Play : To reduce effective clamping load on the carbon thrust bearing and wear thereof, sufficient clutch free pedal play must be provided in the clutch.

Two-phase flow in a horizontal pipe, Two-Phase flow In a Horizontal Pipe ...

Two-Phase flow In a Horizontal Pipe While working for an oil company you are asked to produce a report on a two-phase flow problem. A mixture of oil and gas is to be pumped al

Specifications - boilers, SPECIFIC A TION S:    The boilers are s...

SPECIFIC A TION S:    The boilers are specified as per following parameters : -     Steam Generation Rate : for instance 50 000 kg /hr. -     Maximum Pressure: for

Determine force on a body to pull or push, Determine force on a body to pul...

Determine force on a body to pull or push: Q: A wooden block having weight of 50N rests on the horizontal plane. Determine force required which is acted at an angle of 15° to

Duty cycle, Duty cycle The concept of duty cycle is to be clearly under...

Duty cycle The concept of duty cycle is to be clearly understood before operating any machine. Unlike the arc welding power sources, the resistance welding power sources are de

What do you mean by vibration, A body is subjected to two harmonic motions ...

A body is subjected to two harmonic motions as given below : X 1 = 15 sin (wt + 30 0 ) and X 2 = 8 cos (wt + 60 0 ). What harmonic motion should be given to the body to bring

If crankshaft oil seal seating area found ok, If crankshaft oil seal seatin...

If crankshaft oil seal seating area found ok : Replace with a new oil seal and ensure the seal seats in the stator plate properly and while fixing the stator plate ensure using sta

Equipment for resistance welding-single phase vs three phase, EQUIPMENT FOR...

EQUIPMENT FOR RESISTANCE WELDING-Single phase vs three phase The resistance welding machines can be connected either across 440 V mains (across two lines) or three phase mains.

Analyse the beam, Analyse the beam: Analyse the beam illustrated in Fi...

Analyse the beam: Analyse the beam illustrated in Figure and draw the SFD, BND & thrust diagram. Situated the point of contraflexure, if any. Figure Solution

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