Investigating the effects of nanoparticles and surfactants on heat transfer performance of water in nucleate pool boiling experiment

TL;DR

This study examines how adding nanoparticles and surfactants to water affects heat transfer during nucleate pool boiling, finding significant improvements with specific nanoparticle types, sizes, and concentrations.

Contribution

It provides experimental data on the effects of silica and alumina nanoparticles and surfactants on boiling heat transfer, highlighting optimal conditions for enhanced performance.

Findings

Nanoparticles can increase heat transfer coefficient by up to 70%.

Silica nanoparticles outperform alumina in heat transfer enhancement.

Surfactants slightly improve heat transfer, especially at lower heat fluxes.

Abstract

The main objective of the present study is to investigate the effect of adding nanoparticles at different concentrations and sizes to boiling distilled water on the nucleate pool boiling heat transfer performance. The major studied parameters are the effects of wall heat flux, type of nanoparticles, particle size, and its concentration in aqueous solutions. The tested nanoparticles are silica (SiO2) and alumina (Al2O3) nanoparticles at 0.001, 0.002, 0.003, 0.005, and 0.01 vol% concentrations, and particle sizes of 10, 20, and 50nm. A pool boiling test rig is designed and constructed to conduct heat transfer experiments with Arudino Control System and eight Type-K thermocouples for temperature measurements. The experimental investigations showed that adding definite amounts of nanoparticles to the water at a particular concentration and size improves its physical and thermal properties and consequently improves the heat transfer coefficient in percentages reaching 70% for SiO2. For Al2O3, it showed noticeable lower values compared to Al2O3; however, equal to distilled water. Furthermore, the surfactants showed slightly better HTC values than distilled water which diminishes at high heat flux values.