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- Title
HEAT TRANSFER PERFORMANCE AND FRICTION FACTOR OF VARIOUS NANOFLUIDS IN A DOUBLE-TUBE COUNTER FLOW HEAT EXCHANGER.
- Authors
Dan ZHEN; Jin WANG; Yu PANG; Zhanxiu CHEN; SUNDEN, Bengt
- Abstract
Experimental research was conducted to reveal the effects of nanofluids on heat transfer performance in a double-tube heat exchanger. With nanoparticle weight fraction of 0.5-2.0% and Reynolds number of 4500-14500, the flow resistance and heat transfer were analyzed by using six nanofluids, i.e., CuO-water, Al2O3-water, Fe3O4-water, ZnO-water, SiC-water, SiO2-water nanofluids. Results show that SiC-water nanofluid with a weight concentration of 1.5% provides the best improvement of heat transfer performance. 1.0% CuO-water and 0.5% SiO2-water nanofluids have lower friction factors in the range of Reynolds number from 4500-14500 compared to the other nanofluids. Based on test results of heat transfer performance and flow resistance, the 1.0% CuO-water nanofluid shows a great advantage due to a relatively high heat transfer performance and a low friction factor. Finally, empirical formulae of Nusselt numbers for various nanofluids were established based on experimental data tested in the double-tube heat exchanger.
- Subjects
NANOFLUIDS; HEAT exchangers; NANOFLUIDICS; HEAT transfer; FLOW meters; NUSSELT number; REYNOLDS number
- Publication
Thermal Science, 2020, Vol 24, Issue 6A, p3601
- ISSN
0354-9836
- Publication type
Article
- DOI
10.2298/TSCI200323280Z