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Système de mesure de la qualité des ailettes d'un échangeur de chaleur à plaques-ailettes.

Measure system on fins processing quality of plate-fin heat exchanger.

Numéro : pap. A7-095

Auteurs : SHU J., HUANG G., LIU W., et al.

Résumé

As compact and high efficiency heat exchangers, plate-fin heat exchangers have been found widely applications in cryogenics, refrigeration and air-conditioning systems. The fins processing quality of the plate-fin heat exchangers deeply influences the flow and heat transfer characteristics. A new type of evaluation method of the fins processing quality is presented. In order to quantificationally judge the fins processing quality, the standard curve ranges of fins fluid friction factors f changed with the Reynolds number Re (i.e. the Re-f standard curve ranges of the fins flow resistence characteristics) are obtained by a lot of experimental validation. A computer aided wind tunnel system used in testing fins flow characteristics of the plate-fin heat exchanger is set up. The air flow, air temperature, and air pressure drop passed through the fin can be real time, automatically, accurately measured, and then the Re-f standard curve ranges of the fins flow resistence characteristics are determined reasonably, by which the fins processing quality can be evaluated exactly. The machined fins are eligible if the friction factors f under the rated Reynold number Re are whtithin the Re-f standard curve ranges of the fins flow resistence characteristics. The experimental results showed that friction factors f increase with the working time due to the abrasion of special punch tools under the same Reynolds number Re. In addition, the toolmaking and toolsetting precision, the fin dentation number, the thickness of aluminium film and the oil film covered on the aluminum film obviously have an effect on the fins flow characteristics. The computer aided wind tunnel system is a reliable technical instrument for the fins manufacture and the plate-fin heat exchangers design.

Documents disponibles

Format PDF

Pages : 9 p.

Disponible

  • Prix public

    20 €

  • Prix membre*

    15 €

* meilleur tarif applicable selon le type d'adhésion (voir le détail des avantages des adhésions individuelles et collectives)

Détails

  • Titre original : Measure system on fins processing quality of plate-fin heat exchanger.
  • Identifiant de la fiche : 30004725
  • Langues : Anglais
  • Source : ACRA2010. Asian conference on refrigeration and air conditioning: Tokyo, Japan, June 7-9, 2010.
  • Date d'édition : 07/06/2010

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