Rankine cycle - thermodynamics, Mechanical Engineering

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.

Posted Date: 10/15/2012 7:00:46 AM | Location : United States







Related Discussions:- Rankine cycle - thermodynamics, Assignment Help, Ask Question on Rankine cycle - thermodynamics, Get Answer, Expert's Help, Rankine cycle - thermodynamics Discussions

Write discussion on Rankine cycle - thermodynamics
Your posts are moderated
Related Questions
how does shearing failure occurs

Convert the flow-rate from Am3/h to Sm3/h Consider a compressor (model ABC-Z4).  The compressor has a suction pressure of 3 barg, and a discharge pressure of 6 barg.  The inlet

explain the following terms in brief:- point function and path funtion

Design for a water treatment plant: Produce as individuals a single tab Excel spreadsheet which shows a rough initial design for a water treatment plant taking 15

Q. Describe the Selection of elctrodes? The selection of a proper electrode for electric arc welding is very important to obtain a sound welded joint of proper strength. The va

Q. What are the basic use of Sand rammer? It is the apparatus of make specimens of moulding sand, for tests such as - permeable test, the various strength tests, and shatter te

Washing and Drying a Motorcycle :  It is important to wash and dry the motorcycle before servicing. It would ensure cleanliness during the service and would not allow any dust ent


Can you give me the Prove of the bending Equation M/I=E/R=σ/Y

Synthesize a mechanism to prepare a function y = log x for 1≤ x ≤ 2 where three precision points are needed, for these precision points Calculate φ 2 , φ 3 and ψ 2 , ψ 3 ; if Δφ