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Pregled bibliografske jedinice broj: 1044161

Energy and Exergy Evaluation of a Two-Stage Axial Vapour Compressor on the LNG Carrier


Poljak, Igor; Orović, Josip; Mrzljak, Vedran; Bernečić, Dean
Energy and Exergy Evaluation of a Two-Stage Axial Vapour Compressor on the LNG Carrier // Entropy (Basel. Online), 22 (2020), 1; 1-20 doi:10.3390/e22010115 (međunarodna recenzija, članak, znanstveni)


CROSBI ID: 1044161 Za ispravke kontaktirajte CROSBI podršku putem web obrasca

Naslov
Energy and Exergy Evaluation of a Two-Stage Axial Vapour Compressor on the LNG Carrier

Autori
Poljak, Igor ; Orović, Josip ; Mrzljak, Vedran ; Bernečić, Dean

Izvornik
Entropy (Basel. Online) (1099-4300) 22 (2020), 1; 1-20

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

Ključne riječi
two‐stage LNG compressor ; energy losses ; exergy destruction ; energy efficiency ; exergy efficiency

Sažetak
Data from a two‐stage axial vapor cryogenic compressor on the dual‐fuel diesel–electric (DFDE) liquefied natural gas (LNG) carrier were measured and analyzed to investigate compressor energy and exergy efficiency in real exploitation conditions. The running parameters of the two‐ stage compressor were collected while changing the main propeller shafts rpm. As the compressor supply of vaporized gas to the main engines increases, so does the load and rpm in propulsion electric motors, and vice versa. The results show that when the main engine load varied from 46 to 56 rpm at main propulsion shafts increased mass flow rate of vaporized LNG at a two‐stage compressor has an influence on compressor performance. Compressor average energy efficiency is around 50%, while the exergy efficiency of the compressor is significantly lower in all measured ranges and on average is around 34%. The change in the ambient temperature from 0 to 50 °C also influences the compressor’s exergy efficiency. Higher exergy efficiency is achieved at lower ambient temperatures. As temperature increases, overall compressor exergy efficiency decreases by about 7% on average over the whole analyzed range. The proposed new concept of energy‐saving and increasing the compressor efficiency based on pre‐cooling of the compressor second stage is also analyzed. The temperature at the second stage was varied in the range from 0 to −50 °C, which results in power savings up to 26 kW for optimal running regimes.

Izvorni jezik
Engleski

Znanstvena područja
Strojarstvo, Tehnologija prometa i transport



POVEZANOST RADA


Projekti:
CEEPUS CIII-HR-0108
DATACROSS KK.01.1.1.01.0009
uniri-tehnic-18-275-1447
uniri‐tehnic‐18‐18‐1146
uniri‐tehnic‐18‐14
HRZZ-IP-2018-01-3739 - Sustav potpore odlučivanju za zeleniju i sigurniju plovidbu brodova (DESSERT) (Prpić-Oršić, Jasna, HRZZ - 2018-01) ( POIROT)

Ustanove:
Tehnički fakultet, Rijeka,
Pomorski fakultet, Rijeka,
Sveučilište u Zadru

Profili:

Avatar Url Igor Poljak (autor)

Avatar Url Josip Orović (autor)

Avatar Url Dean Bernečić (autor)

Avatar Url Vedran Mrzljak (autor)

Citiraj ovu publikaciju:

Poljak, Igor; Orović, Josip; Mrzljak, Vedran; Bernečić, Dean
Energy and Exergy Evaluation of a Two-Stage Axial Vapour Compressor on the LNG Carrier // Entropy (Basel. Online), 22 (2020), 1; 1-20 doi:10.3390/e22010115 (međunarodna recenzija, članak, znanstveni)
Poljak, I., Orović, J., Mrzljak, V. & Bernečić, D. (2020) Energy and Exergy Evaluation of a Two-Stage Axial Vapour Compressor on the LNG Carrier. Entropy (Basel. Online), 22 (1), 1-20 doi:10.3390/e22010115.
@article{article, author = {Poljak, Igor and Orovi\'{c}, Josip and Mrzljak, Vedran and Berne\v{c}i\'{c}, Dean}, year = {2020}, pages = {1-20}, DOI = {10.3390/e22010115}, keywords = {two‐stage LNG compressor, energy losses, exergy destruction, energy efficiency, exergy efficiency}, journal = {Entropy (Basel. Online)}, doi = {10.3390/e22010115}, volume = {22}, number = {1}, issn = {1099-4300}, title = {Energy and Exergy Evaluation of a Two-Stage Axial Vapour Compressor on the LNG Carrier}, keyword = {two‐stage LNG compressor, energy losses, exergy destruction, energy efficiency, exergy efficiency} }
@article{article, author = {Poljak, Igor and Orovi\'{c}, Josip and Mrzljak, Vedran and Berne\v{c}i\'{c}, Dean}, year = {2020}, pages = {1-20}, DOI = {10.3390/e22010115}, keywords = {two‐stage LNG compressor, energy losses, exergy destruction, energy efficiency, exergy efficiency}, journal = {Entropy (Basel. Online)}, doi = {10.3390/e22010115}, volume = {22}, number = {1}, issn = {1099-4300}, title = {Energy and Exergy Evaluation of a Two-Stage Axial Vapour Compressor on the LNG Carrier}, keyword = {two‐stage LNG compressor, energy losses, exergy destruction, energy efficiency, exergy efficiency} }

Časopis indeksira:


  • Current Contents Connect (CCC)
  • 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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