Experimental study on the utilization of magnetic nanofluids in an air-to-air heat pipe heat exchanger


Babat R. A. A. , Martin K. , ÇİFTÇİ E. , SÖZEN A.

CHEMICAL ENGINEERING COMMUNICATIONS, 2021 (Journal Indexed in SCI) identifier identifier

  • Publication Type: Article / Article
  • Publication Date: 2021
  • Doi Number: 10.1080/00986445.2021.1977634
  • Title of Journal : CHEMICAL ENGINEERING COMMUNICATIONS
  • Keywords: Air-to-air heat pipe heat exchanger, iron aluminate spinel, magnetic nanofluid, performance improvement, PERFORMANCE

Abstract

Nanofluids have often been utilized lately for enhancing the thermal performance of heat transfer devices operating with a working fluid. In this study, using iron aluminate spinel nanoparticles, deionized water-based nanofluids at various mass concentrations (0.5%, 1.0%, and 2.0%) of nanoparticles were prepared and tested as the test fluid inside the heat pipes of the air-to-air heat exchanger operating between hot and cold air passages. The efficiency, as well as thermal resistance of the heat pipes, were investigated under varying Reynolds number combinations of hot and cold air passages. An increase up to 87.2% in efficiency and a decrease up to 71.6% in thermal resistance of the heat pipes were obtained with the utilization of magnetic nanofluid. Furthermore, the effect of nanoparticle concentration on performance was discussed.