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A new dynamic heat exchanger model with frosting and defrosting.

Number: pap. 2249

Author(s) : QIAO H., AUTE V., RADERMACHER R.

Summary

In this paper, a dynamic heat exchanger model that unifies the frosting and defrosting analyses is presented. A novel scheme is proposed to solve the air flow redistribution due to non-uniform frost blockage. Unlike the existing defrost models which separate analysis for tubes and fins, the proposed defrost model unifies the analysis to maintain model consistency. The first-principles based frost and defrost models developed in this research allow for a more realistic assessment of the heat pump systems and greatly facilitate the design of controls. Utilizing the developed models, the transient behavior of a flash tank vapor injection heat pump under frosting and defrosting conditions is investigated and validated against experimental data.

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Pages: 10 p.

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Details

  • Original title: A new dynamic heat exchanger model with frosting and defrosting.
  • Record ID : 30012979
  • Languages: English
  • Source: 2014 Purdue Conferences. 15th International Refrigeration and Air-Conditioning Conference at Purdue.
  • Publication date: 2014/07/14

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