Gas turbine engine
First Claim
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1. A gas turbine engine system comprising in operating series:
- a compressor system for compressing a working fluid;
a combustor downstream of the compressor system;
a turbine system downstream of the combustor;
an exhaust flue;
vapour generating means downstream of the turbine having a first operating side for containment of the working fluid and a second operating side for containment of a liquid fluid to be vapourised in the vapour generating means by heat transfer with the working fluid, wherein the vapour generating means has a dry-run capability such that the turbine exhaust passes through the first operating side without a fluid to be vapourised passing through the second operating side;
a bypass damper downstream of the first operating side of the vapour generating means; and
a condenser for condensing condensable fluid from the working fluid, wherein the bypass damper is switchable between a first operating position, where the working fluid is directed to a bypass conduit which bypasses the condenser before joining the exhaust flue, and a second operating position where the working fluid passes through the condenser to the exhaust flue.
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Abstract
A steam injection gas turbine engine having a once-through steam generator (OTSG). A condenser is provided downstream of the OTSG to capture water and is protected from hot flue gasses during startup by a bypass circuit. Optionally, heating the exhaust downstream of the condenser using coolant taken from an intercooler provides plume suppression.
27 Citations
12 Claims
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1. A gas turbine engine system comprising in operating series:
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a compressor system for compressing a working fluid; a combustor downstream of the compressor system; a turbine system downstream of the combustor; an exhaust flue; vapour generating means downstream of the turbine having a first operating side for containment of the working fluid and a second operating side for containment of a liquid fluid to be vapourised in the vapour generating means by heat transfer with the working fluid, wherein the vapour generating means has a dry-run capability such that the turbine exhaust passes through the first operating side without a fluid to be vapourised passing through the second operating side; a bypass damper downstream of the first operating side of the vapour generating means; and a condenser for condensing condensable fluid from the working fluid, wherein the bypass damper is switchable between a first operating position, where the working fluid is directed to a bypass conduit which bypasses the condenser before joining the exhaust flue, and a second operating position where the working fluid passes through the condenser to the exhaust flue. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A method of operating a gas turbine engine system comprising in operating series:
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a compressor system for compressing a working fluid; a combustor downstream of the compressor system; a turbine system downstream of the combustor; vapour generating means downstream of the turbine having a first operating side for containment of the working fluid and a second operating side for containment of a liquid fluid to be vapourised in the vapour generating means by heat transfer with the working fluid, wherein the vapour generating means has a dry-run capability such that the turbine exhaust passes through the first operating side without a fluid to be vapourised passing through the second operating side; a bypass damper downstream of the first operating side of the vapour generating means; and a condenser for condensing condensable fluid from the working fluid, wherein the bypass damper is switchable between a first operating position, where the working fluid is directed to a bypass conduit which bypasses the condenser before joining an exhaust flue from which the working fluid is exhausted from the gas turbine engine system, and a second operating position where the working fluid passes through the condenser to the exhaust flue, the method comprising; supplying the liquid fluid to the vapour generator means; supplying the working fluid to the vapour generator means; and vaporizing the liquid fluid in the vapor generator means.
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Specification