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IIR document

Effects of cooling surface micro-machining shapes on frosting curves.

Number: pap. n. 936

Author(s) : AGUI H., OHKUBO H., MATSUSHITA S.

Summary

Naturally formed frost on heat exchangers of low temperature devices is a cause for both increased resistance to air-passage and heat transfer. Therefore, defrosting operations will be needed when frost has collected excessively to avoid the deterioration of the heat exchanger efficiency. Focusing on the size of the droplets, the authors’ group artificially changed the characteristics of the cooling surface by machining grid shapes of 100 microns order on the cooling surface. By doing so, they have succeeded in producing zones with no frost-crystal growth on the surface. In this study, the effects of the groove patterns on the frosting phenomenon under natural convection condition were investigated by varying the cooling surface temperature from -75 °C to -10 °C.

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Pages: 6

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Details

  • Original title: Effects of cooling surface micro-machining shapes on frosting curves.
  • Record ID : 30026775
  • Languages: English
  • Source: Proceedings of the 25th IIR International Congress of Refrigeration: Montréal , Canada, August 24-30, 2019.
  • Publication date: 2019/08/24
  • DOI: http://dx.doi.org/10.18462/iir.icr.2019.0936

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