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

Explain asphalt paving machine, Explain Asphalt paving machine In the l...

Explain Asphalt paving machine In the laying of asphalt pavement roadways, it is common practice to utilize Floating screed type paving machines. These machines typically inclu

What is erosion loss, Q. What is Erosion Loss? Additional metal thickne...

Q. What is Erosion Loss? Additional metal thickness must be added in specific locations where metal loss is expected, due to stream flow that is of high velocity, or is abrasiv

Determine the buckling load, (a) Evaluate the buckling load of column with ...

(a) Evaluate the buckling load of column with one end fixed other free of 8m length by using Euler's formula. Given : I min = 1390m 4 E = 2 X 10 5 N/mm 2 (b) Derive a

Task, Thin wall tube has diameter of 60mm. The end of it will be compressed...

Thin wall tube has diameter of 60mm. The end of it will be compressed to square form. Calculate how many percents torsion strength will becomne lower at the end of tube?

Show the limitations of rigid bed models, Q. Show the Limitations of Rigid ...

Q. Show the Limitations of Rigid bed models? Due to vertical exaggeration, model slope automatically becomes steeper than in the prototype, this slope exaggeration being the sa

Robotics, Application of group technology point wise

Application of group technology point wise

Motion of the boat, Motion of the boat:  (i) A man having weighs 500 N...

Motion of the boat:  (i) A man having weighs 500 N and is in a boat weighing 1500 N which is free to move over a steady lake. If he begins running along the length of the boat

Co2 welding-power source, CO2 WELDING-Power Source Normally, a power so...

CO2 WELDING-Power Source Normally, a power source with constant potential characteristics is used for CO 2 welding as it has the ability to self regulate the welding arc. The

How can we use of shrinkage allowance, Q. How can we use of Shrinkage allow...

Q. How can we use of Shrinkage allowance? Since metal shrinks on solidification and contracts further on cooling to room temperature, linear dimensions of the pattern is increa

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