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

Determine the break power of the engine, If a Laboratory experiment, the fo...

If a Laboratory experiment, the following data were recorded with rope Break dynamometer : Diameter of fly-wheel = 1.2 m Diameter of the rope = 12.5 mm Speed = 200 r.p.m.

Explain constant velocity joint attaching to spindle, Method:- Using the co...

Method:- Using the constant velocity joint attaching to spindle. U-joint is a joint used to attach two non parallel non intersecting shafts, and it can transfer power at angle

Material science, give me assinment for Bearing material

give me assinment for Bearing material

Determine reactions at supports, Determine reactions at supports: Det...

Determine reactions at supports: Determine reactions at supports of supported beam of 6m span carrying increasing load of 1500N/m to 4500N/m from one end to another end.

About learning software''s, I am am Mtech student of Machine design and I a...

I am am Mtech student of Machine design and I am willing to join some core companies so is this the right time for learning some software''s if yes which are they...

What do you mean by risers and downcomers, Q. What do you mean by Risers an...

Q. What do you mean by Risers and Downcomers? Risers and downcomers shall be staggered along the shell of the WHB and steam drum for uniform water/steam circulation in the syst

Corrosion assessment of flare and vru system, Q. Corrosion Assessment of Fl...

Q. Corrosion Assessment of Flare and VRU System? The worst case scenario shall be considered during material selection of Flare KO Drums. Depending on the fluid composition ent

Define flavorings in iges, Define Flavorings in IGES Flavorings : IGE...

Define Flavorings in IGES Flavorings : IGES contained several ways to capture the same information, which made proper interpretation largely dependent on the particular  "fla

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