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Pregled bibliografske jedinice broj: 714400

Detailed analysis of the effect of the turbine and compressor isentropic efficiency on the thermal and exergy efficiency of a Brayton cycle


Živić, Marija; Galović, Antun; Virag, Zdravko
Detailed analysis of the effect of the turbine and compressor isentropic efficiency on the thermal and exergy efficiency of a Brayton cycle // Thermal science, 18 (2014), 3; 843-852 doi:10.2289/TSCI1403843Z (međunarodna recenzija, članak, znanstveni)


CROSBI ID: 714400 Za ispravke kontaktirajte CROSBI podršku putem web obrasca

Naslov
Detailed analysis of the effect of the turbine and compressor isentropic efficiency on the thermal and exergy efficiency of a Brayton cycle

Autori
Živić, Marija ; Galović, Antun ; Virag, Zdravko

Izvornik
Thermal science (0354-9836) 18 (2014), 3; 843-852

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
Brayton cycle; net work per cycle; thermal efficiency; exergy efficiency

Sažetak
Energy and exergy analysis of a Brayton cycle with an ideal gas is given. The irreversibility of the adiabatic processes in turbine and compressor is taken into account through their isentropic efficiencies. The net work per cycle, the thermal efficiency and the two exergy efficiencies are expressed as functions of the four dimensionless variables: the isentropic efficiencies of turbine and compressor, the pressure ratio, and the temperature ratio. It is shown that the maximal values of the net work per cycle, the thermal and the exergy efficiency are achieved when the isentropic efficiencies and temperature ratio are as high as possible, while the different values of pressure ratio that maximize the net work per cycle, the thermal and the exergy efficiencies exist. These pressure ratios increase with the increase of the temperature ratio and the isentropic efficiency of compressor and turbine. The increase of the turbine isentropic efficiency has a greater impact on the increase of the net work per cycle and the thermal efficiency of a Brayton cycle than the same increase of compressor isentropic efficiency. Finally, two goal functions are proposed for thermodynamic optimization of a Brayton cycle for given values of the temperature ratio and the compressor and turbine isentropic efficiencies. The first maximizes the sum of the net work per cycle and thermal efficiency while the second the net work per cycle and exergy efficiency. In both cases the optimal pressure ratio is closer to the pressure ratio that maximizes the net work per cycle.

Izvorni jezik
Engleski

Znanstvena područja
Strojarstvo



POVEZANOST RADA


Projekti:
120-1201760-1757 - Izmjena topline i mase u fluidiziranom sloju
120-1201760-1758 - Metode računalne dinamike fluida (Virag, Zdravko, MZOS ) ( CroRIS)
152-1201760-2202 - Numeričko modeliranje konvekcijsko difuzijskih procesa s promjenom faza (Živić, Marija, MZOS ) ( CroRIS)

Ustanove:
Fakultet strojarstva i brodogradnje, Zagreb,
Strojarski fakultet, Slavonski Brod

Profili:

Avatar Url Marija Živić (autor)

Avatar Url Antun Galović (autor)

Avatar Url Zdravko Virag (autor)

Poveznice na cjeloviti tekst rada:

doi http

Citiraj ovu publikaciju:

Živić, Marija; Galović, Antun; Virag, Zdravko
Detailed analysis of the effect of the turbine and compressor isentropic efficiency on the thermal and exergy efficiency of a Brayton cycle // Thermal science, 18 (2014), 3; 843-852 doi:10.2289/TSCI1403843Z (međunarodna recenzija, članak, znanstveni)
Živić, M., Galović, A. & Virag, Z. (2014) Detailed analysis of the effect of the turbine and compressor isentropic efficiency on the thermal and exergy efficiency of a Brayton cycle. Thermal science, 18 (3), 843-852 doi:10.2289/TSCI1403843Z.
@article{article, author = {\v{Z}ivi\'{c}, Marija and Galovi\'{c}, Antun and Virag, Zdravko}, year = {2014}, pages = {843-852}, DOI = {10.2289/TSCI1403843Z}, keywords = {Brayton cycle, net work per cycle, thermal efficiency, exergy efficiency}, journal = {Thermal science}, doi = {10.2289/TSCI1403843Z}, volume = {18}, number = {3}, issn = {0354-9836}, title = {Detailed analysis of the effect of the turbine and compressor isentropic efficiency on the thermal and exergy efficiency of a Brayton cycle}, keyword = {Brayton cycle, net work per cycle, thermal efficiency, exergy efficiency} }
@article{article, author = {\v{Z}ivi\'{c}, Marija and Galovi\'{c}, Antun and Virag, Zdravko}, year = {2014}, pages = {843-852}, DOI = {10.2289/TSCI1403843Z}, keywords = {Brayton cycle, net work per cycle, thermal efficiency, exergy efficiency}, journal = {Thermal science}, doi = {10.2289/TSCI1403843Z}, volume = {18}, number = {3}, issn = {0354-9836}, title = {Detailed analysis of the effect of the turbine and compressor isentropic efficiency on the thermal and exergy efficiency of a Brayton cycle}, keyword = {Brayton cycle, net work per cycle, thermal efficiency, exergy efficiency} }

Časopis indeksira:


  • Web of Science Core Collection (WoSCC)
    • Science Citation Index Expanded (SCI-EXP)
    • SCI-EXP, SSCI i/ili A&HCI
  • Scopus


Citati:





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