Gas Turbine Handbook : Principles and Practices

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118 Gas Turbine Handbook: Principles and Practices Figure 8-1. Courtesy of American Air Filter International. A schematic view of an inertial separator showing the paths taken by the clean air flow through the separator and the dirty air out of the separator. Another type of filter is the cannister filter (Figure 8-3). This filter is provided with and without a self-clean feature, and with and without prefilters. Unlike barrier type filters, the cannister filters do not include an intermediate filter stage (although it has been proposed to install the cannister filter as the intermediate filter stage immediately upstream of a high efficiency barrier filter). The “ self-clean” cannister filter design uses high pressure compressor air to backflow or reverse flow each filter cartridge. The reverse flow is designed to blow excess dust from the element. In principle these filters would accumulate a dust load to increase efficiency up to a target level. At the target differential pressure the reverse flow, self-clean, feature would
Gas Turbine Inlet Treatment 119 Figure 8-2. Courtesy of American Air Filter International. A typical 24" x 24" barrier filter. Note the insert sketch that details the internal labyrinth, which provides a large media surface area while maintaining a constant filter frontal area. maintain the filter efficiency level. These filters evolved for desert and arctic regions where blowing sand or snow would quickly overload and clog the barrier type filter. Cannister filters are very effective at and above 5.0 microns. However, in areas where the major contamination is from particulate at and below 2.0 microns, cannister filters alone are inadequate. Attempts to improve the overall efficiency by
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Gas Turbine Handbook: Principles an
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Gas Turbine Handbook: Principles an
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Dedication This book is dedicated t
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Contents PREFACE ..................
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Chapter 13—BOROSCOPE INSPECTION .
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Preface to the Third Edition The ne
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Acknowledgments I wish to thank the
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Figure 2-3. Courtesy of United Tech
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Appendix A-2 304 Gas Turbine Handbo
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5. Weather Hood Material __________
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Appendix C-6 Air/Oil Cooler Specifi
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9. Drive Requirements A. Hydraulic
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22. Packaging For Shipment Per Spec
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Parameters Units NH 3 CO H 2 CH 4 C
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.055 Parameters Units 1/0 .88/.12 .
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Koppers Foster Blue Coal Gas Winkle
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Gas Turbine Handbook : Principles and Practices

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