Exergy and energy analysis of a wavy fin radiator with variously shaped nanofluids as coolants

Abstract

The present study deals with the energy and exergy analysis of a wavy fin radiator deploying various shapes of Al2O 3‐water as nanocoolant. The effects of radiator effectiveness, pumping power, heat transfer rate, and performance index with variously shaped nanoparticles, mainly spherical, brick, and platelet, on coolant flow rates and air velocities have been investigated. Also, the impacts of entropy, second law efficiency, entropy generation number, and irreversibility on radiator performance analysis have been considered with steady‐state assumptions. Theoretical analysis revealed that the spherical particle–based nanocoolant showed 21.9%, and 18.2% higher effectiveness than platelet and brick nanocoolants. However, minimization in the entropy generation is observed in the platelet shape of the nanoparticle. The second law efficiency is 13% higher for the spherical nanocoolant compared with the brick nanocoolant. An optimum entropy generation number is found at a coolant flow rate of 13 l/min and then gradually decreases with an increase in the coolant flow rate. For all the considered operating parameters, the spherical nanoparticle showed a better performance than brick and platelet nanofluids as a radiator coolant. Due to the enhanced overall performance for the spherical nanofluid, it may be considered as a potential candidate for a radiator coolant.

An updated review of nanofluids in various heat transfer devices

“…Moreover, experimental results demonstrate that Al 2 O 3 /EG-water at 0.1 Vol% and CuO/EG-water at 0.2 Vol% improved the heat transfer potential of the radiator by 30-35% and 40-45%, respectively. Kumar and Sahoo [344] analysed the energy and exergy performance of a wavy fin radiator using Al 2 O 3 -water nanofluid as a coolant. The effect of various nanoparticle shapes (spherical, brick and platelet) on the radiator's effectiveness, pump power and heat transfer was also investigated; results show that the shape of the nanoparticles affected their performance in the radiator.…”

Heat Transfer Investigation of Laminar Flow Mixed Convection of Nanofluids in a Uniformly Heated Horizontal Annulus: A Combination of Theoretical-Based and Experimental-Based Models of Thermal Conductivity and Viscosity

“…thermal exchangers [11][12][13][14], and electronic cooling [15][16][17][18][19] are examples of nanofluids employed as heat transfer fluids. Numerous studies on the thermophysical properties of nanofluids have been conducted in order to enhance heat transmission and thermal efficiency [20][21][22][23][24][25][26][27].…”

Effect of porous slab thickness and Darcy number on thermohydraulic transport characteristics of Ag–TiO2/water hybrid nanofluid flow‐through partially porous wavy channels

“…Because of their low cost, passive technologies are commonly used in industrial manufacturing. Finned tube, 1,2 contoured tube, inserts, corrugated tube, 3,4 porous media flow, 5,6 converging and diverging channels, 7 and nonfluids flow 8,9 are all commonly used passive technologies. Vicente et al 10 investigated the heat transmission and flow rates of ten various types of corrugated tubes.…”