Draft
Download
1 / 18

DRAFT - PowerPoint PPT Presentation


  • 200 Views
  • Updated On :

DRAFT. Introduction. Mechanical Power Reciprocating Engines Turbines Turbines are compact machines (high power to weight ratio, having less balancing problems and less oil consumption. Turbines Hydraulic turbines Steam turbines Gas turbines

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

PowerPoint Slideshow about 'DRAFT' - jolie


An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript

Introduction l.jpg

Introduction

Mechanical Power

Reciprocating Engines

Turbines

Turbines are compact machines (high power to weight ratio, having less balancing problems and less oil consumption.

Turbines

Hydraulic turbines

Steam turbines

Gas turbines

The performance of these machines depend on compressor efficiency, pressure ratio and turbine inlet temperature.


Introduction3 l.jpg
Introduction

  • Gas Turbine versus Steam turbine

  • Steam turbine plants are utilized for producing large power 1000 MW per unit. Gases are used to heat water and steam. Then steam is used in turbines to produce power.

  • In gas turbines gas is directly used to produce power

  • Power cycles are simple, complex and combined (steam and gas)

  • Simple and combined gas turbines

  • Use of turbines

  • Electrical power generation

  • Jet propulsion

  • Supply of compressed air/ gas

  • Mechanical power generation




Examples of application l.jpg
Examples of Application

Impeller of a compressor


Examples of application7 l.jpg
Examples of Application

  • Vaned diffuser for centrifugal compressor



Examples of application9 l.jpg
Examples of Application

  • Schematic of flow in an axial turbine. Contours of pressure are from a CFD calculation


Examples of application10 l.jpg
Examples of Application

Reaction turbine (Francis type):


Examples of application11 l.jpg
Examples of Application

Impulse turbine (Pelton type):


Examples of application12 l.jpg
Examples of Application

Cutaway view of the GE90 turbofan engine designed for long-range commercial aircraft


Introduction13 l.jpg
Introduction

  • Description of simple cycle

  • Specific work, w; thermal efficiency, η= w/q

  • Assumptions:

  • Both compressor and turbine are isentropic (reversible adiabatic, η= 100 %)

  • Pressure losses in both of combustion chamber and heat exchanger are negligible.

  • Working fluid is air. It behaves as an ideal gas

  • Mass flow rate is constant and combustion process is replaced by heat addition process.


Introduction14 l.jpg
Introduction

  • First law of thermodynamics (conservation of energy)

  • q – w = Δh

  • Compressor (adiabatic, q=0.)

  • Turbine


Introduction15 l.jpg
Introduction

  • Combustion chamber



Introduction17 l.jpg
Introduction

  • Open cycle single shaft and twin-shaft arrangements

  • Complex with inter-cooling, heat exchange and reheat

  • Multi-spool arrangements

  • Typical gas turbine design procedures