Analysis of Rankine Cycle with FWH P M V Subbarao Professor Mechanical Engineering Department I I T Delhi Engineering solution to Pure Thoughts..…..

Slides:

Advertisements

Similar presentations

Use of Regeneration in Vapor Power Cycles

Advertisements

OFF DESIGN PERFORMANCE PREDICTION OF STEAM TURBINES

Rankine Cycle Figures from Cengel and Boles, Thermodynamics, An Engineering Approach, 6th ed., McGraw Hill, 2008.

Development of Steam & Gas Turbines P M V Subbarao Professor Mechanical Engineering Department Basic Elements of Industrial Revolution……

Reliable Rankine Cycle : One OFWH & Many CFWHS…. A truly Concurrent Design …… P M V Subbarao Professor Mechanical Engineering Department I I T Delhi.

Reading: Cengel & Boles, Chapter 9

ENERGY CONVERSION ES 832a Eric Savory Lecture 12 – Large-scale plants Department of Mechanical and Material Engineering.

Vapor and Combined Power Cycles

Power Generation OBJECTIVE To examine vapor power plants in which the working fluid is vaporized and condensed.

Chapter 1 VAPOR AND COMBINED POWER CYCLES

ES 202 Fluid and Thermal Systems Lecture 23: Power Cycles (2/4/2003)

Vapor Power Cycles Thermodynamics Professor Lee Carkner Lecture 19.

Vapor and Combined Power Cycles

A Train of Closed Feed Water Heaters A Trade off between Irreversibility and Reliability !!! P M V Subbarao Professor Mechanical Engineering Department.

Lec 23: Brayton cycle regeneration, Rankine cycle

A Vapor Power Cycle Boiler T Turbine Compressor (pump) Heat exchanger

Irreversible Flow from Turbine Exit to Condenser

Power Generation Cycles Vapor Power Generation The Rankine Cycle

Power Generation Using Multi Component Working Fluids P M V Subbarao Professor Mechanical Engineering Department Indian Institute of Technology Delhi Synthesis.

Effect of Reheating and Feed Water Heating on Steam Generation P M V Subbarao Professor Mechanical Engineering Department Good to Turbine and Cycle…..

Recent Developments in Reheat Rankine Cycle BY P M V Subbarao Professor Mechanical Engineering Department I I T Delhi New Efforts to Realize Isothermal.

chapter 9 Steam Power Cycle 9-1 The Rankine Cycle Vapor Carnot cycle T s There are some problems: (1)Compressor (2)turbine.

Thermodynamics II Chapter 1 VAPOR POWER CYCLES

Exergy Analysis of STHE P M V Subbarao Professor Mechanical Engineering Department I I T Delhi Formalization of Thermo-economics…..

Vapor and Combined Power Cycles (2)

Unit 4 Exercise – Gas Vapour and Combined Power Cycle

Lesson 8 SECOND LAW OF THERMODYNAMICS

A Vapor Power Cycle Boiler T Turbine Compressor (pump) Heat exchanger

STEAM TURBINE POWER CYCLES. The vast majority of electrical generating plants are variations of vapour power plants in which water is the working fluid.

Chapter 10 VAPOR AND COMBINED POWER CYCLES

Optimal Location of Multiple Bleed Points in Rankine Cycle

1 ChemE 260 Improvements and Non-Ideal Behavior in the Rankine Cycle May 20, 2005 Dr. William Baratuci Senior Lecturer Chemical Engineering Department.

Analysis of Rankine Cycle with FWHs P M V Subbarao Professor Mechanical Engineering Department I I T Delhi Engineering solution to Pure Thoughts..…..

Chapter 10 Vapor and Combined Power Cycles Study Guide in PowerPoint to accompany Thermodynamics: An Engineering Approach, 7th edition by Yunus.

Study & Analysis of Carnot’s Model for Ideal Machine P M V Subbarao Professor Mechanical Engineering Department IIT Delhi A True Concept of Blue Printing…….

SSSF Analysis of Devices Used in Power Generation - 1 P M V Subbarao Professor Mechanical Engineering Department Sources of Work for Manufacturing Industry.

The Rankine Cycle: An Alternate Ideal Thermodynamic Model P M V Subbarao Professor Mechanical Engineering Department IIT Delhi A Feasible Mathematical.

ENGR 2213 Thermodynamics F. C. Lai School of Aerospace and Mechanical Engineering University of Oklahoma.

Rankine Cycle for Power Generation By P M V Subbarao Mechanical Engineering Department I I T Delhi An appropriate amalgamation of Theory and Practice.

ENGR 2213 Thermodynamics F. C. Lai School of Aerospace and Mechanical Engineering University of Oklahoma.

1 A 英 Consider a regenerative cycle using steam as the workingfluid. Steam leaves the boiler and enters the turbine at 4 MPaand 400 ℃. After expansion.

T s boiler turbine pump work in work out heat out heat in condenser superheated vapor saturated liquid & vapor compressed liquid critical point.

Superheat Rankine Cycle Example Turbine pump condenser Q out Q in W out W in boiler Consider the superheat Rankine power cycle as we analyzed before.

Subject :- Engineering Thermodynamics ( ) Prepared by : THAKOR AKASHKUMAR GANESHBHAI TRIVEDI MURALIDHAR MAHENDRABHAI CHARAN.

P M V Subbarao Professor Mechanical Engineering Department

Vapor ,Gas and Combined Power Cycles

prepared by Laxmi institute tech. Mechanical eng. Department.

Chapter: 08 POWER CYCLES.

Simple Thermal Power Plant

TOPIC:- VAPOUR CYCLES CREATED BY:

Power and Refrigeration Systems

Power Plant Technology Steam and Gas Cycle Power Plant (Assignment 1)

Power Plant Technology Steam and Gas Cycle Power Plant (Assignment 2)

Carnotization of Rankine Cycle thru Regeneration

A Train of Closed Feed Water Heaters

Impact of Cycle Design on Steam Generator

Carnotization of Rankine Cycle

9 CHAPTER Vapor and Combined Power Cycles.

Analysis of Constant Pressure Steam Generation

Analysis of Power Generation Cycles

SSSF Analysis of Devices Used in Power Generation - II

Developments in Rankine Cycle for Efficient Steam Generation

Generation of Most Eligible Steam for Rankine Cycle

Scientific Realization of Practicable Power Plant

Classification of Rankine Cycles

Condenser in Power Plants

Generation of Most Eligible Steam for Rankine Cycle

Regenerative Rankine Cycle

Optimal Location of Multiple FWHs in Rankine Cycle

Be Frank on Reconciliation or Breakup ……

Presentation transcript:

Analysis of Rankine Cycle with FWH P M V Subbarao Professor Mechanical Engineering Department I I T Delhi Engineering solution to Pure Thoughts..…..

Regeneration Cycle with Open FWH

Analysis of OFWH h3h3 h6h6 y h2h2 1-y Conservation of energy:

Haywood Methodology Analysis of Engineering Cycles : R.W. Haywood PBPB

Assumptions : 1.The Difference between local steam enthalpy and enthalpy of saturated water at the same pressure is constant throughout the expansion. 2.Constant ‘β’ Assumption by Haywood. By assuming that the turbine expansion line follows a path on the diagram such that the (h-h f )=constant= β Where, h- local enthalpy on the turbine expansion line at a given pressure. h f =Enthalpy of saturated water at that pressure.

Let the enthalpy rise of feed water in the heater is . 4f4f

4f4f Maximum irreversibility to be eliminated = The total enthalpy rise of feed water = h 4f – h 1 Let

4f4f Pump work input is negligible

There fore the efficiency can be written as Here β and α are fixed and  is variable. So, there is an optimum value of γ for which η is a maximum. On differentiation, There fore  = α / 2 The cycle efficiency is maximum when the total enthalpy rise of feed water (h 4f – h 1 ) from the condenser temperature to the boiler saturation temperature is divided equally between the feed water heater and the economizer ( i.e. h 4f – h 4 = h 3 – h 2 ) in a single bleed cycle.

So the temperature rise in the feed water heater is ΔT = ½ ( T boiler saturation – T condenser ) And the corresponding cycle efficiency is For a non-regenerative cycle,

The maximum gain in efficiency due to regeneration This is positive. This shows that the cycle efficiency has improved due to regeneration.

Location of Haywood’s Optimum OFWH h3h3 h6h6 y h2h2 1-y

Analysis of Regeneration through OFWH

Analysis of Bleed Steam Performance p bleed, MPa

Analysis of Condensing Steam Performance p bleed, MPa

Comparison of Performance of Bleed & Condensing steams P regen, MPa  cond  bleed

Performance of FWH Cycle p regen, MPa  total ~ 12MPa

Performance of bleed Steam p regen, MPa  bleed ~ 2 Mpa

w bleed Workoutput of bleed Steam p regen, MPa ~ 12MPa

Fractional specific output Workoutput of bleed Steam Fraction of Bleed Steam

w bleed Workoutput of bleed Steam

Progress in Rankine Cycle Year MW p,MPa T h o C T r o C FHW Pc,kPa ,% --~