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Passive thermal energy storage in refrigerated warehouses.

Author(s) : ALTWIES J. E., REINDL D. T.

Type of article: Article, IJR article

Summary

This paper investigates operational strategies that use stored products as thermal mass to shift refrigeration loads to more favourable operational periods (low energy cost periods, lower outdoor air conditions, etc.) allowing an opportunity to reduce system operating costs. An integrated model of the stored product, warehouse air, and warehouse structure is developed and thermal response characteristics are predicted for a selected warehousing facility. Simulated results are validated with experimental measurements. Food quality impacts associated with the temperature cycling caused by potential operating strategies are discussed. Results from this investigation indicated that a full load-shifting control strategy should save USD 82,000 annually over the test facility's current operational strategy, representing 53% of the total cooling cost. Predicted maximum warehouse temperature variation is 5.6 °C, which is not expected to accuse significant product quality changes in the temperature range (below -18 °C) studied.

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Format PDF

Pages: 149-157

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Details

  • Original title: Passive thermal energy storage in refrigerated warehouses.
  • Record ID : 2002-1443
  • Languages: English
  • Source: International Journal of Refrigeration - Revue Internationale du Froid - vol. 25 - n. 1
  • Publication date: 2002/01

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