THE EFFICIENCY ANALYSIS OF A FINNED CROSS-FLOW HEAT RECOVERY UNIT


KOTCİOĞLU İ., Cansız A.

EXPERIMENTAL HEAT TRANSFER, vol.28, no.1, pp.9-22, 2015 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 28 Issue: 1
  • Publication Date: 2015
  • Doi Number: 10.1080/08916152.2013.803172
  • Journal Name: EXPERIMENTAL HEAT TRANSFER
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.9-22
  • Istanbul Technical University Affiliated: Yes

Abstract

A finned convergent-divergent plate-type cross-flow heat recovery unit is manufactured and tested for efficiency analysis. Temperature and pressure drop experiments are conducted with various working conditions of the boiler, fan, preheater, and reheater of the system. Variation of Nusselt number and friction factor with Reynolds number is analyzed. Variation of effectiveness and exergy loss with number of transfer units is calculated and discussed in terms of extant literature. Experimental results indicate that the most important parameter affecting the heat transfer is winglet geometry and fluid velocity. The efficiency can be improved successfully by controlling these parameters for thermal applications.