Naslov
Performance analysis of a plate heat exchanger using various nanofluids

Autori
Zheng, Dan ; Wang, Jin ; Chen, Zhanxiu ; Baleta, Jakov ; Sundén, Bengt

Izvornik
International Journal of Heat and Mass Transfer (0017-9310) 158 (2020); 119993, 11

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
Nanofluid ; Heat transfer enhancement ; Pressure drop ; Empirical formula ; Plate heat exchanger

Sažetak
In this paper, a corrugated plate heat exchanger in solar energy systems is used to investigate heat trans- fer and fluid flow characteristics of various nanofluids. By adding various nanoparticles (Al 2 O 3 -30 nm, SiC-40 nm, CuO- 30 nm and Fe 3 O 4 -25 nm) into the base fluid, effects of nanofluid types and particle con- centrations (0.05 wt.%, 0.1 wt.%, 0.5 wt.% and 1.0 wt.%) on the thermal performance of the plate heat exchanger are analyzed at flow rates in the range of 3–9 L/min. Results indicate that both heat transfer enhancement and pressure drop for nanofluids show significant increases compared to the base fluid. The Fe 3 O 4 -water and CuO-water nanofluids show the best and the worst thermal performances of the plate heat exchanger, respectively. When 1.0 wt.% Fe 3 O 4 -water nanofluid is used as the working fluid, com- pared to DI-water, the convective heat transfer coefficient is increased by 21.9%. However, an increase of 10.1% in pressure drop is obtained for the 1.0 wt.% Fe 3 O 4 -water nanofluid. Finally, empirical formulas of experimental Nusselt number are obtained based on the experimental data. A new way to predict the thermal performance for various nanofluids in heat transfer systems is provided.

Izvorni jezik
Engleski

Znanstvena područja
Strojarstvo

POVEZANOST RADA