28.11.2014 Views

Gas Turbine Handbook : Principles and Practices

Gas Turbine Handbook : Principles and Practices

Gas Turbine Handbook : Principles and Practices

SHOW MORE
SHOW LESS

You also want an ePaper? Increase the reach of your titles

YUMPU automatically turns print PDFs into web optimized ePapers that Google loves.

26 <strong>Gas</strong> <strong>Turbine</strong> <strong>H<strong>and</strong>book</strong>: <strong>Principles</strong> <strong>and</strong> <strong>Practices</strong><br />

component (compressor, combustor, or turbine) <strong>and</strong> replacement with<br />

a like kind without removing the engine from its support mounts.<br />

Some variations exist among the aero-derivative units in the method<br />

of removing <strong>and</strong> replacing a particular module. Still, the principle of<br />

modular replacement is common in most currently produced aeroderivative<br />

gas turbines. As a result, the effort to remove <strong>and</strong> replace<br />

a compressor module is not significantly different from the effort to<br />

remove <strong>and</strong> replace a turbine module.<br />

The heavy industrial units, by contrast, require the least<br />

amount of effort to remove <strong>and</strong> replace the combustor parts, more<br />

effort to inspect or repair the turbine section, <strong>and</strong> the most effort to<br />

inspect or repair the compressor section.<br />

The flexibility of the aero-derivative unit is “weight” <strong>and</strong> “size”<br />

related. For example, an application convenient to a large source of<br />

experienced manpower (with a well-defined baseload requirement,<br />

<strong>and</strong> good quality fuel) is considerably different from an application in<br />

a remote environment (away from skilled labor, good roads, <strong>and</strong> subject<br />

to varying qualities of fuel <strong>and</strong> loading conditions). The user must<br />

weigh his needs <strong>and</strong> requirements against the variety of machines<br />

offered. The preference has been to place the aero-derivative units in<br />

Figure 3-4. Courtesy of United Technologies Corporation, Pratt &<br />

Whitney Canada. Exploded view of the modules that make up the<br />

FT8 aero-derivative gas turbine.

Hooray! Your file is uploaded and ready to be published.

Saved successfully!

Ooh no, something went wrong!