85 research outputs found
Impiego di un Metodo ad Alta Accuratezza per la Simulazione del Flusso Unidimensionale, Comprimibile, Non Stazionario di un Gas Perfetto nei Condotti
No full text
La riqualificazione energetica di un ospedale. La proposta di alcuni interventi atti a migliorare la gestione energetica di un complesso ospedaliero, con l’obiettivo di ottenere un risparmio sulla bolletta annuale
No full textStudio Numerico del Flusso su Rotori Eolici ad Asse Orizzontale, per l’Analisi della Scia e la Verifica del Pprogetto
No full textA detailed analysis of the unsteady flow within a Wells turbine
No full textSea wave energy is one of the main renewable energy resources. Its exploitation is relatively simple and determines a minimum impact on the environment. The system that is most often used for wave energy harvesting is composed of an oscillating water column device together with a Wells turbine. When designing the Wells turbine, its interaction with the oscillating water column system must be taken into account, if the energy collected is to be maximized. The most important interaction phenomenon is the so called hysteresis effect, i.e. the time delay between the piston-like motion of the air water interface and the torque developed by the turbine. This work presents a detailed analysis of the flow within an oscillating water column system, focusing on the differences in performance and in secondary flow structures between acceleration and deceleration, and between the inflow and outflow phases. This analysis demonstrates how the hysteresis between acceleration and deceleration is caused uniquely by compressibility effects within the oscillating water column system, while differences in the flow parameters and secondary structures near the rotor are negligible, if equivalent flow conditions are compared. The effects of the oscillating water column system configuration on the performance are also highlighted
Nuovo codice di calcolo per il solar cooling
No full textUn codice di calcolo realizzato
per la simulazione di macchine ad
assorbimento con coppia di lavoro
acqua/bromuro di litio, alimentate
con acqua calda prodotta da collettori
solari termici, del tipo piano selettivi
o a tubi sottovuot
Simulazione numerica del flusso non stazionario quasi-1D in condotti a geometria variabile, mediante un codica ad alta accuratezza
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