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- W2016353694 abstract "A computational model for the detailed design of finned coils has been developed. This programme discretises heat exchangers into tube elements for which the governing equations are solved using local values of temperature, pressure, physical properties and heat transfer coefficients. Single-phase, condenser and evaporator cases can be automatically treated using water, R22, R134a, and refrigerant mixtures based on R32, R125, and R134a. The software can handle non-conventional coil circuits with different numbers of inlets and outlets, non-uniform air distribution at the coil inlet face, using smooth, wavy and louvered fins, and smooth and internally finned tubes. The programme has been validated on seven finned coils using pure fluids, with and without moisture condensation on the fins. Comparisons with tests show errors of less than 5% on the coil duty and of the order of 30% on the refrigerant pressure drop. A performance simulation of a coil using R22 and a ternary mixture is presented to validate the programme algorithms developed for mixtures. On a mis au point un modèle de calcul pour la conception détaillée de serpentins ailetés. Ce programme s'intéresse surtout aux élémens des tubes des échangeurs de chaleur pour lesquels les èquations directrices sont résolues en utilisant des valeurs locales de température, pression, des propriétés physiques et des coefficients de transfert de chaleur. Les cas du fluide monophasique, du condenseur et de l'évaporateur peuvent être traités automatiquement en utilisant de l'eau, du R22, du R134a et des mélange de frigorigènes à base de R32, de R125 et de R134a. Le logiciel peut traiter des circuits de serpentines non classiques avec plusieurs bouches d'aspiration et de refoulement, une distribution de l'air non uniforme à l'aspiration due serpentin, utilisant des ailettes lisses, ondulées et à persiennes, et des tubes lisses et à ailettes internes. Le programme a été validé avec 7 serpentins ailetés utilisant des fluides purs, avec et sans condensation sur les ailettes. Des comparaisons avec des essais montrent des erreurs inférieures à 5% pour le serpentin et ses possibilités, et de l'ordre de 30% pour la chute de pression du frigorigène. On présente une simulation de la performance d'un serpentin utilisant du R22 et un mélange ternaire, pour valider les algorithmes du programme mis au point pour les mélanges." @default.
- W2016353694 created "2016-06-24" @default.
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- W2016353694 title "CYRANO: a computational model for the detailed design of plate-fin-and-tube heat exchangers using pure and mixed refrigerants" @default.
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- W2016353694 doi "https://doi.org/10.1016/s0140-7007(96)00052-7" @default.
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