Skip to main content

Efficiency of Gas Turbine

Efficiency of Gas Turbine is defined as the ratio of workdone due to adiabatic expansion to the workdone due to isentropic expansion. In Fig. 5.17 (a) and (b), the cycle 1-2-3-4 represents the ideal cycle and 1'-2-3'-4 represents the actual cycle of a closed cycle gas turbine, in which the curve 4-1' shows the isentropic compression of air in the compressor and the curve 2-3' shows the isentropic expansion of air in the turbine. The turbine efficiency (also called adiabatic efficiency of turbine) is given by


The compressor efficiency (also called isentropic efficiency of compressor) is the ratio of workdone due to isentropic compression to workdone due to adiabatic compression. Mathematically, compressor efficiency,

Note: The efficiency of a simple gas turbine can be increased by using the following methods.

1. By compressing the air in two stages with an intercooler between the two.

2. By expanding the hot air in two stages with a reheater between the two.

3. By providing a heat exchanger through which hot gases from the turbine are made to pass which heat up the compressed air before entering the combustion chamber.


Popular posts from this blog

Are Engineers Favourite Among Girls?

What do girls think about men who are engineers and what type of engineers are most favourite among girls? A survey was conducted by a team of aboutmech with members chosen from different countries. Each team member carried out a neutral survey in his/ her country to evaluate what females think about most of the engineers from different engineering branches. An overview of different questions asked in survey is given below: Question: Which male engineers do you find more attractive as a husband? Almost 50% women voted for mechanical engineers to be the most attractive husbands among other engineers. So mechanical engineers are most favourite among girls as a husband. They find them more trustworthy, intelligent, and creative. A married women from California said, “If your husband is a mechanical engineer, he will help you in everyday tasks. Because mechanical engineers are good team players and they have creative ideas about everything.” Which male engineers do you find more

Best CV Format for Mechanical Engineers

Fifty percent engineers fail to grab a dream job because of basic faults in their CVs/ Resume. This article tells you about best CV format for mechanical engineers and how you are supposed to design your CV when applying for jobs. You CV is your first impression on future employer. He/ she does not know you. Your CV is the only representation of your personality. He/ she may select or reject you after first glance on your resume.  I have experienced shortlisting and interviewing candidates for different jobs. I was astonished to learn that most of the candidates simply copy paste each others CVs without any changes at all. These types of CVs are rejected immediately. I am not trying to tell you that you should avoid copying, rather i ma telling you to refrain from giving your CV to your friends. An ideal CV consists of following portions: Name/ Address of the applicant Objective Education Record Employment History Professional Skills Awards & Achievements Co-Cu

Engineering Mechanics - Introduction

The Engineering Mechanics is that branch of Engineering-science which deals with the principles of mechanics along with their applications to engineering problems. It is sub-divided into the following two main groups: (a) Statics, and (b) Dynamics The Statics is that branch of Engineering Mechanics which deals with the forces and their effects, while acting upon the bodies at rest. The Dynamics is that branch of Engineering Mechanics which deals with the forces and their effects, while acting upon the bodies in motion. It is further sub-divided into the following two branches: (i) Kinetics, and (ii) Kinematics The Kinetics is that branch of Dynamics, which deals with the bodies in motion due to the application of forces. The Kinematics is that branch of Dynamics which deals with the bodies in motion without taking into account the forces which are responsible for the motion.