EnglishThe thermal behaviour of an injection nozzle for a prototype combustion chamber of a cogeneration system based on the reaction of liquid aluminum and water steam, is analyzed. The heat released by the oxidation of aluminum with water is exploited for super-heating the vapor of a steam cycle and simultaneously producing hydrogen. The only by-product is alumina, which can be transformed again into aluminum. From a thermo-mechanical point of view, the most critical part of the system is the injection nozzle, located at the end of a graphite pneumatic needle valve. The head of the injector is made by titanium and includes a Titalox ceramic nozzle characterized by a 0.5 mm calibrated hole. After a warm up cycle, the injector reaches temperatures of the order of 1000°C. During the subsequent cool-down phase, the different strain rates of the two materials could lead to mechanical failure. In this work, the heating and cooling transients of the injection zone are simulated by a Finite Volume approach. Temperature distributions are then transferred to a Finite Element structural solver in order to verify the resulting stresses. Temperature measurements taken during preliminary experimental tests provide a qualitative assessment of the reliability of the numerical predictions.
Thermo-mechanical behaviour of an injection nozzle for a cogeneration system based on the aluminum/water reaction / Angeli, Diego; Castagnetti, Davide; Cingi, Pietro; Leonforte, ADRIANO DAVIDE SERAFINO; Melchionda, Filippo; Milani, Massimo; Montorsi, Luca; Sorrentino, Andrea; Zanni, Davide. - (2019). ((Intervento presentato al convegno XXXVII Congresso Nazionale UIT sulla Trasmissione del Calore tenutosi a Padova nel 24-26/6/2019.
| Data di pubblicazione: | 2019 | |
| Titolo: | Thermo-mechanical behaviour of an injection nozzle for a cogeneration system based on the aluminum/water reaction | |
| Autore/i: | Angeli, Diego; Castagnetti, Davide; Cingi, Pietro; Leonforte, ADRIANO DAVIDE SERAFINO; Melchionda, Filippo; Milani, Massimo; Montorsi, Luca; Sorrentino, Andrea; Zanni, Davide | |
| Autore/i UNIMORE: | ||
| Nome del convegno: | XXXVII Congresso Nazionale UIT sulla Trasmissione del Calore | |
| Luogo del convegno: | Padova | |
| Data del convegno: | 24-26/6/2019 | |
| Citazione: | Thermo-mechanical behaviour of an injection nozzle for a cogeneration system based on the aluminum/water reaction / Angeli, Diego; Castagnetti, Davide; Cingi, Pietro; Leonforte, ADRIANO DAVIDE SERAFINO; Melchionda, Filippo; Milani, Massimo; Montorsi, Luca; Sorrentino, Andrea; Zanni, Davide. - (2019). ((Intervento presentato al convegno XXXVII Congresso Nazionale UIT sulla Trasmissione del Calore tenutosi a Padova nel 24-26/6/2019. | |
| Tipologia | Relazione in Atti di Convegno |
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