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Performance evaluation of Gas Turbine

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Prepared by :

  • Adham Nabil
  • Ahmed Ibrahim Oshba
  • Youssef Osama Rakha
  • Ahmed Gamal El-Faham
  • Mohamed Alaa El-Dein Attia

Supervised by :

  • Dr. Yahiya ElDreeny
  • Dr. Mahmoud Salem

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Introduction

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Definition

  • A Gas Turbine, also called Combustion Turbine

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  • It is a type of continuous and internal combustion engine that change the chemical energy in the fuel to mechanical energy through the combustion chamber
  • The highly pressurized gases rotate the impeller of the turbine producing mechanical energy that de converted to electrical energy by a generator

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History

  • The first gas turbine invented in 1629

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Early 20-th gas turbine generates (GT) 4000kw at efficiency 17.4%

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  • Late 20-th GT generates 70,000 kw electricity at efficiency 45% to 56%

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Mid 20-th GT generates 40,000kw at efficiency 30%

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Nowadays

  • In 2019 GT generates 1,440MW with efficiency approximately 60%

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Simple Brayten Cycle

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Sidi krir power planet

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Mitsubishi M701F Series

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Mitsubishi M701F Series specification

  • Standalone Gas Turbine Output:��380 MW class
  • Combined Cycle Output:

570 MW class / 1,130 MW class

  • Combined Cycle Efficiency:
  • 62% or more
  • High-efficiency gas turbines

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Construction

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Inlet

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Exhaust

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Simulation

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Excel

  • Can perform calculations
  • Connect different software

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Excel program supported from Engineers at GTE facility

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Mathematical Modeling

  • EES
  • It provides many useful specialized functions and equations for the solution of thermodynamics and heat transfer problems,
  • Making it a useful and widely used program for mechanical engineers working in these fields.

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EES Input Equations sample

Dry cycle

Specific humidity

Kg water/kg air

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Relative humidity at 70% table

Relative humidity at 80% table

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Chapter Two�

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Effect of ambient conditions on GTE

  • Temperature
  • Humidity

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Ambient Temperature�

  • Gas turbine power output increases when it is cold, and decreases when it is hot
  • 1.gas turbine is a fixed volume machine.�2.density of air increases when it is cold.�3.The amount of power generated in the turbine increases with a higher mass of air flowing through the turbine.
  •  Colder air improves compressor efficiency.�

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Effect of Ambient humidity on a simple gas turbine

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  • Humidity Effect on GTE performance

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Inlet fogging

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Components of a fogging system�

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Factors for an efficient fogging system��

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Location of inlet fogging

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fog generation�

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Temperature and Humidity

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Chapter three

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Data Gathering On Climate

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EES instead OF PSHYCOMETRIC CHART

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Relative humidity 60%

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Thermal Efficiency�

Efficiency = 1 – [(h4-h1)/(h3-h2)]

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Power to ambient temp after fogger curves using EES

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Fuel flow rate to ambient temp. after fogger curves using EES

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Thermal eff. To ambient temp after fogger curves using EES

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Thank You