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Abstract(s)
Cet article présente les résultats de mesures effectuées, selon la norme ISO 23953, sur un meuble frigorifique de vente ouvert avec double rideau d'air. Il s’agit d'évaluer l'impact des conditions ambiantes sur les performances de l’évaporateur dans des conditions proches de celles rencontrées dans les magasins d'alimentation brésiliens. Les essais ont été réalisés en laboratoire pour deux classes de climat (n° 3 : 25 °C et 60% et n°6 : 27 °C et 70%). Pour chaque essai, la température maximale du produit a été maintenue entre 4 et 5 °C. Ces résultats expérimentaux mettent en évidence la variation de la formation du givre à l’évaporateur (37%) et ses répercussions sur l’aéraulique, les pertes de charge ou encore les températures. L'analyse des données expérimentales fournit des informations précieuses pour la conception de l'évaporateur en fonction des conditions environnementales en magasin.
This paper reports the results of experimental tests performed according to ISO 23953 in an open multideck display case with dual air curtain in order to evaluate the impact of environmental conditions on the performance of its evaporator. Experimental laboratory tests were performed on two climate classes usually found in Brazilian food stores (n° 3: 25ºC and 60% and nº 6: 27ºC and 70%). In either test the maximum product temperature was maintained between 4 and 5°C. The experimental results comparison shows the quantitative variation of the frost formation rate on the evaporator coil and how this phenomenon affects the distribution and magnitude of air flow, pressure drop, inlet and outlet temperatures and the components of the total sensible (+10%) and latent (+46%) heat loads. The analysis of experimental data provides valuable information to the evaporator design based on in-store environmental conditions.
This paper reports the results of experimental tests performed according to ISO 23953 in an open multideck display case with dual air curtain in order to evaluate the impact of environmental conditions on the performance of its evaporator. Experimental laboratory tests were performed on two climate classes usually found in Brazilian food stores (n° 3: 25ºC and 60% and nº 6: 27ºC and 70%). In either test the maximum product temperature was maintained between 4 and 5°C. The experimental results comparison shows the quantitative variation of the frost formation rate on the evaporator coil and how this phenomenon affects the distribution and magnitude of air flow, pressure drop, inlet and outlet temperatures and the components of the total sensible (+10%) and latent (+46%) heat loads. The analysis of experimental data provides valuable information to the evaporator design based on in-store environmental conditions.
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Keywords
Norme - ISO 23953
Pedagogical Context
Citation
Publisher
Association Française du Froid