Influence of environmental temperature on exergetic parameters of a combined cycle power plant

Ünver Ü., Kılıç M.

INTERNATIONAL JOURNAL OF EXERGY, cilt.22, ss.73-88, 2017 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 22
  • Basım Tarihi: 2017
  • Doi Numarası: 10.1504/ijex.2017.10001110
  • Dergi Adı: INTERNATIONAL JOURNAL OF EXERGY
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.73-88
  • Anahtar Kelimeler: exergy analysis, combined cycle exergy, availability, gas turbine efficiency, steam turbine efficiency, GAS-TURBINE, EXERGOECONOMIC ANALYSIS, BOTTOMING CYCLE, COMBINED HEAT, PERFORMANCE, COGENERATION, SYSTEM, ENERGY, OPTIMIZATION, ALGORITHM
  • Bursa Uludağ Üniversitesi Adresli: Evet

Özet

Ambient conditions have significant effect on combined cycle power plants (CCPPs). Parameters-like efficiencies, fuel consumption, power production and even operation cost differ according to the ambient conditions that depend on the climate that cannot be changed. Therefore, deciding the location of the plant wisely would bring more efficient and profitable. In this paper, exergy analysis based on the second law of thermodynamics, considering environmental temperature variations, are performed for a cogeneration power plant. Mathematical model of analyse is introduced. Magnitudes of the variation of irreversibility, reversible power, power production and specific fuel consumption (SFC) are evaluated for the combined cycle. The results indicated that, decrease of environmental temperature augments the energy performance of the combined cycle form about 53% to 56% and improves the exergetic performance from about 51% to 56%. However, the augmentation via temperature decrease is not continuous. It is shown that the environmental temperature decrease causes a reduction about 5% in the SFC.