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Heat transfer with frosting phenomena under natural convection.

Number: pap. C1-048

Author(s) : YOSHIOKA R., INOUE S., OHKUBO H.

Summary

When the surface temperature of a solid is below the solidification point of water, water vapor from the surrounding air condenses on the surface of the solid, forming frost. This phenomenon is generally known as frost formation. It is a transient phenomenon in which both heat transfer and mass transfer take place simultaneously. Frost formation is a process with engineering relevance for consumer products such as refrigerators and heat pumps.Several factors affect frost layer growth and frost crystallization during the frost formation process. These factors include the temperature of the cooling surface on which the frost forms; the temperature, humidity, air velocity, and pressure of the main air flow; the shape, dimensions, orientation, roughness, and wettability of the cooling surface; and the elapsed process time. This study investigated heat transfer during frost formation by examining the overall heat flux of the frost formation process, the heat flux due to convection, the heat flux due to mass transfer, and the heat flux due to radiant heat transfer.

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Pages: 4 p.

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Details

  • Original title: Heat transfer with frosting phenomena under natural convection.
  • Record ID : 30005142
  • Languages: English
  • Source: ACRA2010. Asian conference on refrigeration and air conditioning: Tokyo, Japan, June 7-9, 2010.
  • Publication date: 2010/06/07

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