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http://dx.doi.org/10.5293/kfma.2012.15.6.018

Performance Analysis of a Steam Injected Gas Turbine Combined Heat and Power System Considering Turbine Blade Temperature Change  

Kang, Soo Young (인하대학교 대학원)
Kim, Jeong Ho (인하대학교 대학원)
Kim, Tong Seop (인하대학교 기계공학부)
Publication Information
The KSFM Journal of Fluid Machinery / v.15, no.6, 2012 , pp. 18-24 More about this Journal
Abstract
This study simulated the operation of a steam injected gas turbine combined heat and power (CHP) system. A full off-design analysis was carried out to examine the change in the turbine blade temperature caused by steam injection. The prediction of turbine blade temperature was performed for the operating modes suggested in the previous study where the limitation of compressor surge margin reduction was analyzed in the steam injected gas turbine. It was found that both the fully injected and partially injected operations suggested in the previous study would cause the blade temperature to exceed that of the pure CHP operation and the under-firing operation would provide too low blade temperature. An optimal operation was proposed where both the turbine inlet temperature and the injection amount were modulated to keep both the reference turbine blade temperature and the minimum compressor surge margin. The modulation was intended to maintain a stable compressor operation and turbine life. It was shown that the optimal operation would provide a larger power output than the under-firing operation and a higher efficiency than the original partially injected operation.
Keywords
Gas turbine; Steam injection; Off-design; Turbine blade temperature; Compressor surge margin; Optimal operation;
Citations & Related Records
Times Cited By KSCI : 3  (Citation Analysis)
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