Gas Turbine Handbook : Principles and Practices

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258 Gas Turbine Handbook: Principles and Practices Figure 15-5. Aspropyrgos GT10 Project.
Case Study #2 259 replaced and cracks in the combustor were field repaired. It is necessary to point out that the two machines operate in a very polluted environment. Traces of the lead, zinc and natrium were found in the gas turbine compressors during the Major Inspection. Furthermore, ABB Field Service personnel have observed, on occasions, that implosion doors of the air inlet plenums were found to be opened by operators during the plant operation. The subsequent metallurgical analysis of the damaged parts indicated that the rapid and frequent change of fuel quality is also contributed to the damages and cracks in the combustor. The spare parts and maintenance cost of the two GT10 turbines up to the first Major Inspection was US $140,000 for the two units (for the first three years). For a total of 50,000 operating hours at a combined output of 34,000 kW, this service cost comes to less than 0.2 mils/kWhr. The estimated total cost of parts and service of the Major Inspection of Unit #2 was US $1,120,000; which is equivalent to 2.6 mils/kWhr. Using the same payback calculation technique that was employed in the Corinth Motor Oil Project, the payback of the refinery cogen plant is estimated at 3.5 years. Figure 15-6 describes the plant operating characteristics. Figure 15-6. Hellenic Aspropyrgos Refinery Aspropyrgos, Greece. GT10 Combi/cogen Operating Parameters ———————————————————————————————— Gas Turbine Units 2 × GT10, ABB STAL Unit Output 17 MW @ 95°F Fuels Steam Turbine-Generator HRSG High Pres. Steam Refinery Flare Gas/Propane/ Diesel Oil 15 MW, ABB Type WG1000 30 tons/hr @ 609 psia/770°F Low Pres. Steam 65 tons/hr @ 55 psia/338°F ————————————————————————————————
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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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2 Gas Turbine Handbook: Principles
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Figure 2-3. Courtesy of United Tech
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Chart 8-1 Gas Turbine Environments
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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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