Titolo:  Evaluation of entropy generation methods in wells turbines
Autori: 
Data di pubblicazione:  2019
Autori:  Licheri, F.; Ghisu, T.; Virdis, I.; Puddu, P.; Cambuli, F.
Presenza coautori internazionali:  no
Lingua:  Inglese
Titolo del libro:  Proceedings of the International Conference on Offshore Mechanics and Arctic Engineering - OMAE
Editore:  American Society of Mechanical Engineers (ASME)
Volume:  10
Numero di pagine:  10
Codice identificativo Scopus:  2-s2.0-85075865178
Codice identificativo ISI:  WOS:000513310000021
Revisione (peer review):  Esperti anonimi
Nome del convegno:  ASME 2019 38th International Conference on Ocean, Offshore and Arctic Engineering, OMAE 2019
Periodo del convegno:  2019
Luogo del convegno:  Glasgow, United Kingdom
Abstract:  Entropy generation analyses have been applied, in recent years, to a variety of systems, including Wells turbines. This can be a very powerful method, as it can provide important insights into the irreversibilities of the system, as well as a methodology for identifying, and possibly minimizing, the main sources of loss. However, some of the simplifications used in recent studies raise more than a concern on the validity of the approach. This work proposes a method based on RANS equations to evaluate the en-tropy production in Wells turbines. An estimation of the second-law efficiency of different Wells turbine rotors is also presented, under conditions representative of the air flow inside an OWC device. The main sources of entropy generation are highlighted and compared for the different geometries.
Tipologia: 4.1 Contributo in Atti di convegno

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