Analysis of Reheat Rankine Cycle

Slides:

Advertisements

Similar presentations

OFF DESIGN PERFORMANCE PREDICTION OF STEAM TURBINES

Advertisements

Operational Ideas for Supercritical Systems The Ultimate Criteria for Appreciation ….. P M V Subbarao Professor Mechanical Engineering Department I I.

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

Department of Mechanical Engineering ME 322 – Mechanical Engineering Thermodynamics Lect 27b Jet Aircraft Propulsion.

Performance Analysis of Power Plant Condensers P M V Subbarao Professor Mechanical Engineering Department I I T Delhi A Device Which makes Power Plant.

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

Example 1 - Superheat Rankine Cycle

Department of Mechanical Engineering ME 322 – Mechanical Engineering Thermodynamics Lecture 25 Comparison to Carnot’s Heat Engine Effects of Boiling and.

Chapter 1 VAPOR AND COMBINED POWER CYCLES

Vapor Power Cycles Thermodynamics Professor Lee Carkner Lecture 19.

Anatomy and SSSF Analysis of Ideal Turbo Jet Engine P M V Subbarao Professor Mechanical Engineering Department Features of A True Flying Machine Muscles.

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

Study of Multi Stage Steam Turbines

Thermal_Power_Plant_2 Prepared by: NMG

Irreversible Flow from Turbine Exit to Condenser

Power Generation Cycles Vapor Power Generation The Rankine Cycle

Large Steam& Gas Turbines P M V Subbarao Professor Mechanical Engineering Department Backbones of Modern Nations ……

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.

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)

ENTC-370PROF. ALVARADO1 LAB 8: Steam Turbine (Rankine Cycle Experiment) ENTC

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

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

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..…..

Gas dynamics of Real Combustion in Turbo Combustor P M V Subbarao Professor Mechanical Engineering Department Make Sure that design is Acceptable to Gas.

Lecture Objectives: Finish with absorption cooling Power generation Rankine cycles Connect power generation with heating and cooling –CHP –CCHP.

Binary Power Cycles Universitat Rovira i Virgili Doctorate Program in Chemical and Process Engineering Department of Chemical and Mechanical Engineering.

P M V Subbarao Professor Mechanical Engineering Department

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.

Presentation on Steam Power Plants R.C.Chaturvedi

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.

Further Analysis of Irreversible Processes P M V Subbarao Professor Mechanical Engineering Department Other Methods to Account the Entropy Generation…..

Realization of A Cycle P M V Subbarao Professor Mechanical Engineering Department I I T Delhi How to Create Temperature and Pressure…..?

P M V Subbarao Professor Mechanical Engineering Department

Chapter 10 VAPOR AND COMBINED POWER CYCLES

Objectives Evaluate the performance of gas power cycles for which the working fluid remains a gas throughout the entire cycle. Analyze vapor power.

Compressible Flow Turbines

Lecture Objectives: Answer question related to Project 1 assignment

prepared by Laxmi institute tech. Mechanical eng. Department.

Simple Thermal Power Plant

TOPIC:- VAPOUR CYCLES CREATED BY:

VAPOR & COMBINED POWER CYCLES

The Multistage Impulse Turbines

UNIT IV- Vapour Power Cycles

Carnotization of Rankine Cycle

Furnace Heat Transfer & Steam Generation

Thermo-Economic Analysis of Otto Cycle

9 CHAPTER Vapor and Combined Power Cycles.

Analysis of Constant Pressure Steam Generation

Thermodynamic Analysis of Ramjet Engines

Real Rankine Cycle with Superheat

Analysis of Power Generation Cycles

Developments in Rankine Cycle for Efficient Steam Generation

Jet Aircraft Propulsion

Generation of Most Eligible Steam for Rankine Cycle

Generation of Eco-friendly Steam in Power Plants

Classification of Rankine Cycles

Condenser in Power Plants

Generation of Most Eligible Steam for Rankine Cycle

First Law Analysis of Steam Power Plants

P M V Subbarao Professor Mechanical Engineering Department

Rankine Cycle for Scientific Design of Power generation System

Regenerative Rankine Cycle

Carnot Cycle for Scientific Design of Watt Engine

Optimal Location of Multiple FWHs in Rankine Cycle

Be Frank on Reconciliation or Breakup ……

Presentation transcript:

Analysis of Reheat Rankine Cycle P M V Subbarao Professor Mechanical Engineering Department Means to Eliminate Hurdles while Adopting high Live Steam Pressures ……

Hurdles in Implementation of High Pressure Cycles Tmax = 546C &Tmin=40 C xturbine-exit Main SteamPressure, MPa

Reheating of Steam to Enhance Quality at the Turbine Exit Single Turbine drum

Reheaters The pressure drop inside reheater tubes has an adverse effect on the efficiency of turbine. Pressure drop through the reheater should be kept as low as possible. Higher pipe diameter and low steam will velocities can lower the pressure drop, but leads to higher capital cost. Techno-economically viable Range: Tube diameter : 42 – 60mm.

Cost to Benefit Ratio of Reheat Cycle

Analysis of Reheat Cycle Consider reheat cycle as a combination of Rankine cycle and horn cycle. Cycle 1-2-3-4-5-6-1 = Cycle 1-2-3-4-4’-1 + Cycle 4’-4-5-6-4’. Therefore, 4’ 6

Analysis of Horn Cycle Horn Cycle: 4’ – 4 Isentropic Compression. 4 – 5 Isobaric Heat Addition. 5 – 6 Isentropic Expansion 6 – 4’ Isobaric(thermal) cooling. 4’ 6

Condition for Development of Efficient Reheat Cycle

Change in Efficiency due to Reheating Condition for increased efficiency: Select appropriate reheat pressure, pRH, such that left hand side is maximum.

Selection of Reheat Pressure pmax= 15 MPa Tmax= 550 0C Tsat= 342.20C

Effect of Reheat Pressure Dh,% 1.0 0.2 0.4 0.6 0.8 ~0.3 prh/pmax

Optimal Selection of Reheat Point

Reheating : A Means to implement High Live Steam Pressure Supercritical 593/6210C 593/5930C 565/5930C 565/5650C 538/5650C Improvement in Efficiency, % 538/5380C

Effect of Reheating on Overall Tm,in

Procedure to Determine Optimum Reheat Pressure Calculate the efficiency of Rankine cycle, hRankine. Calculate mean effective temperature of heat addition, Tm,in using Find out pressure corresponding to Tm,in and entropy at HP turbine exit. Add reheating at this pressure and calculate efficiency of the Reheat Cycle. Repeat above steps for few iterations.

pmax= 15 MPa Tmax= 550 0C Tsat= 342.20C

Super Critical Cycle ~ 1990

Effect of Various Steam Parameters on Reheat Cycle

Ultra Supercritical Installations of The World