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Shell side direct expansion evaporation of ammonia on a 3-D structured surface tube bundle with exit superheat effect.

Auteurs : SHAH W., ABBAS A., AYUB Z. H., AYUB A. H., MOREIRA T. A., RIBATSKI G., LI W.

Type d'article : Article de la RIF

Résumé

There is no data available on direct expansion evaporation of refrigerant on the outside of an enhanced surface tube bundle. This study is in continuation of the previous similar study conducted on a plain tube bundle. With the current Ozone Depletion and Global Warming issues it is critical to develop systems with low charge refrigerants especially with natural refrigerants such as ammonia which has zero Ozone Depletion Potential (ODP) and zero Global Warming Potential (GWP). This study presents results of an experimental work on direct expansion of ammonia on a triangular pitch 3-D structured enhanced surface tube bundle with saturation temperature range -2 to -20 °C, heat flux range 15 to 48 kW m−2 and exit superheat range 2 to 10 °C. The test matrix falls well within the practical operating conditions of industrial refrigeration systems. A classic increase in heat transfer coefficient is observed with saturation temperature and heat flux. The effect of exit super heat on the overall performance of the bundle is reported. The results are compared to previous studies conducted for pool boiling.

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Format PDF

Pages : 1-9

Disponible

  • Prix public

    20 €

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    Gratuit

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Détails

  • Titre original : Shell side direct expansion evaporation of ammonia on a 3-D structured surface tube bundle with exit superheat effect.
  • Identifiant de la fiche : 30030947
  • Langues : Anglais
  • Sujet : Technologie, Alternatives aux HFC
  • Source : International Journal of Refrigeration - Revue Internationale du Froid - vol. 147
  • Date d'édition : 03/2023
  • DOI : http://dx.doi.org/doi.org/10.1016/j.ijrefrig.2022.02.001

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