excellent course in gas turbine (part 2) -TECHNICAL PRINCIPLES OF GAS TURBINES.




TECHNICAL PRINCIPLES OF GAS TURBINES





FIRST:
WORKING PRINCIPLES OF GAS TURBINES


SECOND:
TURBINE OPERATION





FIRST
WORKING PRINCIPLES OF GAS TURBINES

INTRODUCTION:

Gas turbines are considered as a heat engine working according to thermodynamic cycle of constant pressure. Air is used as the working medium in the majority of practical applications, where it is compressed and heated up then expanded. From thermodynamic point of view, it is possible to prove that the work taken from air or exerted on it, at high temperature levels, is higher than that at low temperature levels. Therefore, it is possible to obtain a quantity of work from the turbine during expansion stage of the cycle higher than the work exerted during compression. The difference is sufficient to overcome all different sources of losses in addition to a huge quantity as output power used in different purposes.
As it is possible to add heat to the cycle by burning the fuel internally in the working medium (the air), or adding it from outside source, therefore the cycle may be called of internal combustion or external combustion type.
Air must be the working medium in case of internal combustion, as oxygen is necessary for combustion. If the cycle is of external combustion, it is possible to use any type of gases or vapors. If any other gas, rather than air is used, the cycle should be closed cycle.
Explaining the details of thermodynamics is out of this course, but some of principle thermodynamics are



to download the full part 2  course from there :
http://www.multiupload.com/39UV7TI8JO


download part 1 from here
http://industries-news.blogspot.com/2010/04/excelent-course-in-gas-turbine.html








there are  good books about this field that will help you too much :

   

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