Evaluating the potential of vortex-enhanced evaporator performance for refrigeration applications

Mark C. Gentry, Nicole C. DeJong, Anthony M. Jacobi

Research output: Contribution to journalArticlepeer-review


In many refrigeration systems, overall evaporator performance is limited by the heat transfer and pressure-drop behavior of the air side. The air side limits performance because the heat transfer coefficients are inherently lower for single-phase gas flow than for the two-phase refrigerant flow. Therefore, it is important to identify air-side performance enhancements suitable for the low-Reynolds-number frosting conditions found in these applications. In this paper the results of a preliminary assessment of vortex-induced air-side heat transfer enhancement for refrigeration applications are reported. The results indicate that longitudinal vortices may significantly improve air-side thermal performance, leading to smaller heat exchangers for a fixed duty or to better thermal performance for a fixed heat exchanger envelope. Further research is recommended to evaluate the to-scale performance of vortex generators under frosting conditions.

Original languageEnglish (US)
Pages (from-to)361-366
Number of pages6
JournalASHRAE Transactions
Issue number2
StatePublished - 1996

ASJC Scopus subject areas

  • Building and Construction
  • Mechanical Engineering


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