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An inverse lump parameter method for determination of heat transfer coefficients for an industrial air blast chiller.

Author(s) : MOHAMED I. O.

Summary

An inverse model using lump body was developed to calculate heat transfer coefficients as a dynamic function of time. The model used sequential function specification algorithm to calculate surface heat flux from transient temperature measurements inside a lump body system. Transient temperature measurements were collected during cooling inside an industrial chiller at two different positions with different air velocities using four replicates for each position. The calculated surface heat flux was found two be very accurate as the maximum value of the root mean squares of error for temperature is 0.045°C, lower than the expected error form thermocouple measurements. The calculated heat flux was then used to calculate heat transfer coefficients as a dynamic function of cooling time followed by calculation of time average heat transfer coefficient using numerical integration. The approach developed here could be a pragmatic powerful tool to model special variation of heat transfer coefficients for industrial refrigeration units.

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Pages: ICR07-C2-1280

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Details

  • Original title: An inverse lump parameter method for determination of heat transfer coefficients for an industrial air blast chiller.
  • Record ID : 2008-0297
  • Languages: English
  • Source: ICR 2007. Refrigeration Creates the Future. Proceedings of the 22nd IIR International Congress of Refrigeration.
  • Publication date: 2007/08/21

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