Enhancement of critical heat flux using spherical porous bodies in saturated pool boiling of nanofluid

Mori, Shoji; Yokomatsu, Fumihisa; Utaka, Yoshio

doi:10.1016/j.applthermaleng.2018.08.047

Cited by 25 publications

(4 citation statements)

References 53 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…As compared to untreated flat Cu surface, the two-tier structures resulted in maximum CHF enhancement of 119.3%, followed by microgrooves by 110.5% and CuNWs by 68.6%. Mori et al [159] proposed coating of hybrid porous cellulose beads and TiO2 nanofluid for the enhanced NBHT performance on a curved surface. The study reported 2 times enhancement of CHF.…”

Section: Micro-scale Coatingsmentioning

confidence: 99%

Micro-Nano Scale Surface Coating for Nucleate Boiling Heat Transfer: A Critical Review

2018

View full text Add to dashboard Cite

Nucleate boiling is a phase change heat transfer process with a wide range of applications i.e., steam power plants, thermal desalination, heat pipes, domestic heating and cooling, refrigeration and air-conditioning, electronic cooling, cooling of turbo-machinery, waste heat recovery and much more. Due to its quite broad range of applications, any improvement in this area leads to significant economic, environmental and energy efficiency outcomes. This paper presents a comprehensive review and critical analysis on the recent developments in the area of micro-nano scale coating technologies, materials, and their applications for modification of surface geometry and chemistry, which play an important role in the enhancement of nucleate boiling heat transfer. In many industrial applications boiling is a surface phenomenon, which depends upon its variables such as surface area, thermal conductivity, wettability, porosity, and roughness. Compared to subtractive methods, the surface coating is more versatile in material selection, simple, quick, robust in implementation and is quite functional to apply to already installed systems. The present status of these techniques for boiling heat transfer enhancement, along with their future challenges, enhancement potentials, limitations, and their possible industrial implementation are also discussed in this paper.

show abstract

Section: Micro-scale Coatingsmentioning

confidence: 99%

Micro-Nano Scale Surface Coating for Nucleate Boiling Heat Transfer: A Critical Review

2018

View full text Add to dashboard Cite

show abstract

“…The results indicated a stable enhancement in CHF during the boiling period. Additionally, Mori et al [ 24 ] suggested adding a plate of honeycomb on the heating area while using TiO 2 NF in a saturated PB, and a significant enhancement of CHF was observed by maximum implementation of the new technique with NFs. In addition, TiO 2 NF has been investigated in PB by Hadži’ et al [ 25 ] and an improvement in CHT of NF at 0.1 wt.% of NPs compared to DW was reported.…”

Section: Introductionmentioning

confidence: 99%

Pool Boiling Heat Transfer Characteristics of New and Recycled Alumina Nanofluids

Ajeeb

Murshed

2023

Nanomaterials

View full text Add to dashboard Cite

This paper reports an experimental investigation of the heat transfer features of new and recycled Alumina (Al2O3) nanofluids (NFs) in the pool boiling (PB) system. The mixture of ethylene glycol (EG) and distilled water (DW) is selected as the base fluid (BF), and NFs samples of two low concentrations (0.01 and 0.05 vol.%) of Al2O3 nanoparticles were prepared. Furthermore, the characteristics of the prepared NFs are evaluated to investigate the heat transfer performance as well as the reusability of the NFs for long-term applications and recycling consideration. Although there have been a large number of boiling studies with NFs, the current study is the first of its kind that addresses the mentioned operation conditions of recycling NF samples. The results are compared with the relevant BF in terms of properties, critical heat flux (CHF), burnout heat flux (BHF), and the convection coefficient of the Al2O3 NFs in the PB system. The results showed good enhancements in both CHF and BHF of these NFs yielding up to 60% and 54% for BHF at 0.05 vol.%, respectively. The reusage of the previously used (recycled) Al2O3 NF showed a considerable increase in heat transfer performance compared to base fluids but slightly lower than the newly prepared one. The results of the reused nanofluids demonstrate the great prospects of their recyclability in heat transfer systems and processes such as in pool boiling.

show abstract

“…The CHF represents a state which at fewer heat fluxes, the system is at the stable and safe working conditions. 4,5 A lot of research has been done on the pool boiling, which generally leads to two types of hot surface and hot wire experiments. 6,7 Also, many researchers have presented correlations for estimating CHF of pool boiling.…”

Section: Introductionmentioning

confidence: 99%

Visualization of pool boiling and occurring critical heat flux on coiled wire

DolatiAsl

Bakhshan

Abedini

2020

Proceedings of the Institution of Mechanical Engineers, Part E:

View full text Add to dashboard Cite

Pool boiling is used in various industries and play a significant role in heat transfer. So far, multiple studies have been carried out on investigating boiling and applying heat flux on the wire. In the present paper, the boiling of the coiled wire under atmospheric pressure conditions has been investigated. The fluid temperature inside the pool is considered under both constant (equal to saturation temperature) and variable temperature conditions. The value of the ring density in the coiled wire is considered to be variable. Based on the results, changing the pool liquid temperature changes bubble departure diameter and frequency. Also, increasing the density of the coil ring increases the diameter of bubbles. It has been observed that the bubbles are usually formed inside the coil, and after moving to the two ends of the coil, they leave the coil. However, by increasing the amount of heat flux and the pool liquid temperature, the size of bubbles will be larger; therefore, the bubbles must leave the coil from the empty spaces between the rings. By increasing the amount of applied heat flux, the coil was enclosed in a layer of vapor, which results in a decrease in the amount of heat transfer coefficient, and finally, a sudden increase in temperature on the wire will occur, which indicates the critical heat flux. Also, it has been observed that the critical heat flux always arises in the coil region of wire and not in the straight part of the wire.

show abstract

Enhancement of critical heat flux using spherical porous bodies in saturated pool boiling of nanofluid

Cited by 25 publications

References 53 publications

Micro-Nano Scale Surface Coating for Nucleate Boiling Heat Transfer: A Critical Review

Micro-Nano Scale Surface Coating for Nucleate Boiling Heat Transfer: A Critical Review

Pool Boiling Heat Transfer Characteristics of New and Recycled Alumina Nanofluids

Visualization of pool boiling and occurring critical heat flux on coiled wire

Contact Info

Product

Resources

About