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- W2042464660 abstract "One variable required for modelling the heat transfer and pressure drop of refrigerant inside air conditioner evaporators and condensers is the void fraction. Eight void fraction models were used in a refrigeration system model to evaluate their impact on the estimation of important system variables in an air conditioner as a function of charging. The void fraction models included: (i) homogeneous, (ii) Lockhart and Martinelli, (iii) Thom, (iv) Zivi, (v) Baroczy, (vi) Hughmark, (vii) Premoli and (viii) Tandon. The system variables considered included: power, capacity, refrigerant flow, subcooling and superheat. Comparisons were made with a 10.6 kW capacity air conditioner with capillary tube expansion. Results indicate that the Hughmark void fraction model appeared to provide the best comparison to measured data over the range of charging conditions considered. Le taux de charge (qui s'exprime ici en taux de vide, c'est-à-dire le rapport du volume occupé par le gaz sur le volume total intérier du circuit frigorifique) est une variable à prendre en considération pour la modélisation du transfert de chaleur et de la chute de pression du frigorigène à l'intérieur des évaporateurs et des condenseurs des conditionneurs d'air. On a utilisé huit types de modèles pour une installation frigorifique, afin d'évaluer leur effet sur l'évaluation des variables importantes du système dans un conditionneur d'air. Les modèles étaient les suivants: (1) homogène, (2) Lockhart et Martinelli, (3) Thom, (4) Zivi, (5) Baroczy, (6) Hughmark, (7) Premoli, et (8) Tandon. Les variables du système considérées ont été la puissance, la capacité, l'écoulement de frigorigène, le sous-refroidissement et la surchauffe. Les comparaisons ont été faites avec un conditionneur d'air d'une puissance de 10,6 kW avec détente par tube capillaire. Les résultats ont indiqué que le modèle du taux de vide de Hughmark semblait fournir la meilleure corrélation avec les données mesurées pour toutes les conditions de charge considérées." @default.
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- W2042464660 date "1994-01-01" @default.
- W2042464660 modified "2023-09-26" @default.
- W2042464660 title "The effect of void fraction model on estimation of air conditioner system performance variables under a range of refrigerant charging conditions" @default.
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- W2042464660 doi "https://doi.org/10.1016/0140-7007(94)90048-5" @default.
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