Steam turbines, Mechanical Engineering

Assignment Help:

The steam that leaves the super-heater is expanded from 130bar at 535°C to 25.2bar at 310°C in a high pressure turbine. The steam from the exit of the HP turbine is reheated to 535°C in the boiler. The reheated steam is then expanded to 8.5bar at 378°C in the intermediate pressure turbine, after which a certain percentage of the steam is bled off to a feedwater heater. The remaining steam is then expanded through a low pressure turbine to 0.05 bar and a dryness fraction of 0.94. All 'steam' entering the feed pumps shall be a saturated fluid.  Produce a schematic diagram of the system, together with an appropriate T-s diagram. Using steam tables only, calculate

  1. The isentropic efficiencies of  the three turbines;
  2. The cycle efficiencies; 
  3. The percentage of steam bled off to the feedwater heater;
  4. The power generated by the turbines per unit mass of steam leaving the boiler;
  5. If the turbines generate 200MW power, how much cooling water must be used per hour, assuming that water can be returned to the river at only 10°C above its extraction temperature? (Assume that the specific heat capacity of water is 4.18 kJ/(kg·K));
  6. If a high pressure surface-type feedwater heater is placed between the boiler and HP feedwater pump to raise the feedwater temperature, configure the cycle and analyse the impact on the cycle performance.

Related Discussions:- Steam turbines

Isothermal compression, The critical Temperature of a gas is the highest te...

The critical Temperature of a gas is the highest temperature for which isothermal compression of the gas results in ? Will an adiabatic ?ash result in more, the same, or less va

What kinds of pipes are used for steam lines, Normally galvanized pipes are...

Normally galvanized pipes are not used for steam. Mild steel with screwed or welded fittings are the norm. Pressure and temperature are very significant factors to be considered in

Free body diagram-friction circle-inertia force , Free Body Diagram: whil...

Free Body Diagram: while a body or link is isolated, the forces (active and reactive) are also illustrated on it. It is called free body diagram of the body. The essential condit

Corrosion assessment for mvc evaporator system, Q. Corrosion Assessment for...

Q. Corrosion Assessment for MVC Evaporator System? Typical evaporator systems in SAGD plants operate under extremely severe corrosive conditions due to high chloride content, e

Zeroth law - thermodynamics, Equalit y of Temperature: Two systems ar...

Equalit y of Temperature: Two systems are having equal temperature if there are no changes in their properties when they are kept in thermal contact with each other. Zer

Differentiate between dynamometer and brakes, Can you Differentiate between...

Can you Differentiate between : Dynamometer and Brakes. Absorption Dynamometer and Transmission Dynamometer.

Theory of production process, In Grey Cast Iron, carbon is present in -----...

In Grey Cast Iron, carbon is present in ------------form while in white cast iron, it is found in ----------- form.

Explain about the raft foundations, Explain about the Raft Foundations ...

Explain about the Raft Foundations The raft foundations are generally used for large loaded area on soils of low bearing capacity. They are of particular use when soils are of

What are rectangular combined footings, What are rectangular combined footi...

What are rectangular combined footings? Rectangular Combined Footings: In the design of rectangular combined footings it is assumed that the footing is rigid. Soil pressure

Equations by gauss-jordan method, a) Answer the following equations by Gaus...

a) Answer the following equations by Gauss-Jordan method x 1 +2x 2 +x 3 =8 ; 2x 1 +3x 2 +4x 3 =20; 4x 1 +3x 2 +2x 3 = 16 b) Answer the following equations by Relaxation m

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