Effect of Inlet Air Heating on Gas Turbine Efficiency under Partial Load

ZhiTan Liu, XiaoDong Ren, ZhiYuan Yan, HongFei Zhu, Tao Zhang, Wei Zhu and XueSong Li
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ZhiTan Liu: Guodian Science and Technology Research Institute, Nanjing 210023, China
XiaoDong Ren: Department of Energy and Power Engineering, Tsinghua University, Beijing 100084, China
ZhiYuan Yan: Guodian Science and Technology Research Institute, Nanjing 210023, China
HongFei Zhu: Guodian Science and Technology Research Institute, Nanjing 210023, China
Tao Zhang: Guodian Science and Technology Research Institute, Nanjing 210023, China
Wei Zhu: Department of Energy and Power Engineering, Tsinghua University, Beijing 100084, China
XueSong Li: Department of Energy and Power Engineering, Tsinghua University, Beijing 100084, China

Energies, 2019, vol. 12, issue 17, 1-11

Abstract: A novel heating technology is presented to analyze the influence of inlet air heating on gas turbine efficiency under partial load. This technology uses the waste heat of a low-temperature heat sources, which includes but is not limited to the exhaust gas of a combined-cycle heat-recovery steam generator or a single-cycle gas turbine. A calculation model of the equilibrium running point is used for the given load and the characteristic curves of the compressor and the turbine to study the mechanism of the inlet air heating technology. Then, the equilibrium running line is calculated and drawn in the characteristic curves of the compressor and the turbine. The factors for gas turbine efficiency are discussed through the calculated equilibrium running line. The results show that an increase in inlet air temperature has considerable potential for improving gas turbine efficiency due to the increase in compressor and turbine efficiency. This finding is different from traditional viewpoints. Meanwhile, each partial load has an optimum heating temperature which becomes higher when the load is lower.

Keywords: Gas turbine; Inlet air heating; Partial load; Equilibrium running line; Gas turbine efficiency (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2019
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (2)

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