Influence of orientation and roughness of heater surface on critical heat flux and pool boiling heat transfer coefficient of nanofluid

Published on Sep 1, 2017in Applied Thermal Engineering5.295
· DOI :10.1016/J.APPLTHERMALENG.2017.06.025
Mina Dadjoo1
Estimated H-index: 1
(IUT: Isfahan University of Technology),
Nasrin Etesami18
Estimated H-index: 18
(IUT: Isfahan University of Technology),
Mohsen Nasr Esfahany23
Estimated H-index: 23
(IUT: Isfahan University of Technology)
Sources
Abstract
Pool boiling of SiO2/water nanofluid over a copper flat plate heater at various inclinations of the heater surface was investigated experimentally. In this work, the effect of heater surface orientation on changes in surface roughness and on the characteristics of nanofluid boiling was studied. We examined pool boiling of silica nanofluid at various concentrations (<0.1 vol.%) and various heater orientations from a horizontal state (0°) to a vertical state (90°). The results showed that in nanofluid boiling, increasing the inclination angle of the heater surface from 0° to 90° increases the critical heat flux (CHF) and decreases the boiling heat transfer coefficient (BHTC), while in boiling DI water, both for CHF and BHTC, decreases with the angle of the heater surface. Atomic force microscope images from the heater surface which has been boiled in nanofluids illustrated that surface roughness varies with the orientation of the surface. It was found that deposition of nanoparticles and bubble movements have important effects on nanofluid boiling over inclined surface. In addition, the performance of the boiling of DI water on a nanocoated surface was examined. The results showed that CHF and BHTC increase in comparison with the boiling of DI water on a bare heater.
📖 Papers frequently viewed together
1951
References27
Newest
#1A. Rainho Neto (UFSC: Universidade Federal de Santa Catarina)H-Index: 1
#2J.L.G. Oliveira (UFSC: Universidade Federal de Santa Catarina)H-Index: 10
Last. Júlio César Passos (UFSC: Universidade Federal de Santa Catarina)H-Index: 15
view all 3 authors...
Abstract The characteristics of nucleate pool boiling were investigated with nanofluids in a chamber. Nanoparticles of alumina, maghemite and carbon nanotubes were added separately to distilled water. Particle volumetric concentrations of 0.02% and 0.10% were applied. Experiments with water on the heater copper surface covered with nanoparticles were conducted to evaluate the effect of deposition. Boiling curves, critical heat fluxes and heat transfer coefficients were obtained and compared to r...
Source
#1Ali Abdollahi (IUT: Isfahan University of Technology)H-Index: 22
#2Mohammad Reza Salimpour (IUT: Isfahan University of Technology)H-Index: 28
Last. Nasrin Etesami (IUT: Isfahan University of Technology)H-Index: 18
view all 3 authors...
Abstract In this research, an experimental study was conducted to investigate the pool boiling heat transfer of Fe3O4/water nanofluid (ferrofluid) in the atmospheric pressure. This study also investigated the influence of the magnetic field on the rate of boiling heat transfer of nanofluid. Deionized (DI) water was used to examine the repeatability, integrity and precision of the experimental apparatus where a well agreement with the existing correlations was observed. The investigation of vario...
Source
#1Mohammad Mohsen Sarafraz (Semnan University)H-Index: 32
#2Faramarz Hormozi (Semnan University)H-Index: 37
Abstract A set of experiments have been performed to quantify the pool boiling heat transfer coefficient of dilute copper oxide water-based nanofluids at mass concentrations of 0.1–0.4%. To stabilize the two-step nanofluids, pH control, stirring and sonication were utilized. For investigating the influence of surfactant as a surface active agent additive on the pool boiling heat transfer coefficient of nanofluids, SDS, SDBS and Triton X-100 were used. Influence of some operating parameters such ...
Source
#1Zahra Shahmoradi (IUT: Isfahan University of Technology)H-Index: 1
#2Nasrin Etesami (IUT: Isfahan University of Technology)H-Index: 18
Last. Mohsen Nasr Esfahany (IUT: Isfahan University of Technology)H-Index: 23
view all 3 authors...
Abstract Nucleate pool boiling of Al2O3 based aqueous nanofluid on flat plate heater has been studied experimentally. For boiling of nanofluid (
Source
#1Mohammad Reza Raveshi (KNTU: K.N.Toosi University of Technology)H-Index: 6
#2Ali Keshavarz (KNTU: K.N.Toosi University of Technology)H-Index: 11
Last. Shayan Amiri (IUT: Isfahan University of Technology)H-Index: 2
view all 4 authors...
Abstract One of the most recent techniques for improvement of boiling processes is using nanofluids. As a simple explanation, adding nanoparticles to regular fluids makes nanofluids. Present article investigates nucleate boiling heat transfer of alumina–water–ethylene glycol nanofluids under atmospheric pressure, experimentally. The experimental setup accuracy has been evaluated for deionized water and mixture of water and ethylene glycol, which shows very good agreement with available correlati...
Source
#1Seong Dae Park (UNIST: Ulsan National Institute of Science and Technology)H-Index: 8
#2Seung Won Lee (UNIST: Ulsan National Institute of Science and Technology)H-Index: 9
Last. In Cheol Bang (UNIST: Ulsan National Institute of Science and Technology)H-Index: 27
view all 5 authors...
Abstract External reactor vessel cooling (ERVC) for in-vessel retention (IVR) of corium as a key severe accident management strategy can be achieved by flooding the reactor cavity during a severe accident. In this accident mitigation strategy, the decay heat removal capability depends on whether the imposed heat flux exceeds critical heat flux (CHF). To provide sufficient cooling for high-power reactors such as APR1400, there have been some R&D efforts to use the reactor vessel with micro-porous...
Source
#1Ramakrishna N. Hegde (RIT: M. S. Ramaiah Institute of Technology)H-Index: 7
#2Shrikantha S. RaoH-Index: 13
Last. R. P. Reddy (Reva Institute of Technology and Management)H-Index: 8
view all 3 authors...
Experiments were performed to study boiling induced nanoparticle coating and its influence on pool boiling heat transfer using low concentrations of CuO- nanofluid in distilled water at atmospheric pressure. To investigate the effect of the nanoparticle coated surface on pool boiling performance, two different concentrations of CuO nanofluids (0.1 and 0.5 g/l) were chosen and tests were conducted on a clean heater surface in nanofluid and nanoparticle coated surface in pure water. For the bare h...
Source
Nanofluids (suspensions of nanometer-sized particles in base fluids) have recently been shown to have nucleate boiling critical heat flux (CHF) far superior to that of the pure base fluid. Over the past decade, numerous experimental and analytical studies on the nucleate boiling CHF of nanofluids have been conducted. The purpose of this article is to provide an exhaustive review of these studies. The characteristics of CHF enhancement in nanofluids are systemically presented according to the eff...
Source
#1Jacob N. Chung (UF: University of Florida)H-Index: 31
#2Tailian Chen (GU: Gonzaga University)H-Index: 1
Last. Shalabh C. MarooH-Index: 18
view all 3 authors...
Recent research progress in the area of nano/micro scale nucleate boiling is reviewed and an up-to-date summary is provided with a focus on the advances of fundamental boiling physics. This review examines nano/micro scale pool boiling experimental and theoretical/numerical work reported in the open literature. On the experimental side, the topics covered are moving contact line, critical heat flux, boiling curve, nucleation, single bubble boiling cycle, bubble coalescence boiling cycle, heater ...
Source
#1Dongsheng Wen (QMUL: Queen Mary University of London)H-Index: 59
#2Michael Corr (QMUL: Queen Mary University of London)H-Index: 1
Last. Guiping Lin (Beihang University)H-Index: 20
view all 4 authors...
This work reports a comparative study of nucleate boiling heat transfer with aqueous alumina nanofluids on two specially designed surfaces. The detailed surface characterization before and after boiling reveals that the modification of heating surface geometries is mainly responsible for many contradictory results reported in literature. The enhancement or deterioration of boiling heat transfer by nanofluids is dependent upon different surface modifications that strongly affected by the relative...
Source
Cited By43
Newest
#1Reda A. Khalaf-Allah (Suez University)H-Index: 4
#2Eldesouki I. Eid (Suez University)H-Index: 8
Last. Ahmed A. Al-Nagdy (Suez University)H-Index: 1
view all 3 authors...
Abstract null null The nucleate boiling heat transfer coefficient (HTC) can be improved using either active or passive techniques. According to the present disclosure, both techniques are used in combination. In the passive technique, nanoparticles are added to water, whereas a rotating mixer is used in the active technique to improve the boiling HTC of pure water. This study uses hybrid techniques for HTC enhancement at nucleate pool boiling regime. Experiments were carried out using circular b...
Source
#1Ashutosh Pare (IITs: Indian Institutes of Technology)H-Index: 3
#2Subrata Ghosh (IITs: Indian Institutes of Technology)H-Index: 89
Abstract null null The present investigation focuses on assessing the transient characteristics of nucleate pool boiling heat transfer in Al2O3-water nanofluids. The stable nanofluid samples were prepared for the wt.% concentrations of 0.01, 0.1, and 1. The experiments were performed for the 12h (approx.) boiling durations with varying heat flux and nanofluid concentrations. The surface temperatures remained relatively constant for low and medium heat flux with varying nanofluid concentrations. ...
Source
Thermosyphons are among the most efficient passive heat transfer devices known nowadays. Due to heat and mass transfer limitations of working fluids, much effort is invested in developing a new gen...
Source
#1Pouya Azadi Milani (SRTTU: Shahid Rajaee Teacher Training University)
#2Miralam Mahdi (SRTTU: Shahid Rajaee Teacher Training University)H-Index: 4
Last. Arash Abarghooei (Sharif University of Technology)
view all 3 authors...
In this research, the effect of surface characteristics on boiling heat transfer has been investigated experimentally. For this purpose, a device with the ability to automatically record the liquid temperature of the inlet and outlet of the test area, calculate the coefficient of boiling heat transfer, and heat flux has been developed. The automatic temperature stability of the working fluid and the ability to investigate the effect of surfaces with different characteristics (in terms of materia...
Source
#1Sayantan Mukherjee (KIIT: KIIT University)H-Index: 9
#2Purna Chandra Mishra (KIIT: KIIT University)H-Index: 18
Last. Paritosh Chaudhuri (HBNI: Homi Bhabha National Institute)H-Index: 13
view all 3 authors...
This paper presents an experimental investigation on the pool boiling heat transfer of water containing Al2O3 and TiO2 nanoparticles at 0.01%, 0.05%, 0.1%, 0.5% and 1% mass fractions at ambient pressure. A horizontal flat polished stainless steel plate was chosen as the boiling surface. Significant improvements in the boiling heat transfer coefficient and critical heat flux were recorded up to 0.1%. However, a decrease in heat transfer performance was observed at other concentrations. The surfac...
Source
#1Wen-Xiao Chu (Xi'an Jiaotong University)H-Index: 13
#2Gang Yan (Xi'an Jiaotong University)H-Index: 19
Last. Qiuwang Wang (Xi'an Jiaotong University)H-Index: 57
view all 6 authors...
Abstract null null The flow boiling process of refrigerants indicates significant influence on the refrigeration system performance. With the development of environmental standards in the last two decades, various refrigerants with low Global Warming Potential (GWP) and none ozone depletion potential (ODP). This study provides a review upon flow boiling behavior of refrigerants impacting by lubricant oil. Experimental studies on flow regimes of refrigerant/oil mixtures in macro-scale and that in...
Source
#1Debashis Dey (IIT-KGP: Indian Institute of Technology Kharagpur)H-Index: 1
#2Dibyansu S. Sahu (Siksha O Anusandhan University)H-Index: 1
Source
#1Mahdi Roodbari (KNTU: K.N.Toosi University of Technology)H-Index: 1
#2Hasan Alimoradi (KNTU: K.N.Toosi University of Technology)H-Index: 2
Last. Cyrus Aghanajafi (KNTU: K.N.Toosi University of Technology)H-Index: 13
view all 4 authors...
An experimental setup for pool boiling of dilute dispersions of titanium dioxide (TiO2) nanoparticle in water-ethylene glycol 50 (WEG50) as the base fluid was developed. The nanofluid was stabilized by using sodium lauryl sulfate as a surfactant. The heater surface roughness was affected by the deposition of nanoparticles during boiling which consequently changes the heat transfer characteristics. Three copper heater surface roughnesses: smooth, semi-rough and rough, were used. The effect of sur...
Source
#1Rashid Pourrajab (Shahid Chamran University of Ahvaz)H-Index: 9
#2Aminreza Noghrehabadi (Shahid Chamran University of Ahvaz)H-Index: 26
Last. Mohammad BehbahaniH-Index: 43
view all 3 authors...
Abstract High-performance heat transfer fluids significantly affect the efficiency and overall performance of high heat flux systems. A novel nanocomposite containing mesoporous silica with high dispersity decorated with copper nanoparticles with a high thermal conductivity was synthesized. Fourier-transform infrared (FTIR) spectroscopy, transmission electron microscopy (TEM), X-ray diffraction (XRD), energy-dispersive X-ray spectroscopy (EDX), X-ray photoelectron spectroscopy (XPS) and scanning...
Source
#1Gangtao Liang (DUT: Dalian University of Technology)H-Index: 22
#2Issam Mudawar (Purdue University)H-Index: 92
Abstract Boiling heat transfer enhancement using nanoscale techniques has received considerable attention in recent years. This paper provides a comprehensive review of published articles addressing such techniques for both pool boiling and flow boiling enhancement. Discussed are heat transfer merits or drawbacks (in regards to both heat transfer coefficient and critical heat flux) for each technique, with particular focus on reliability concerns stemming from any time-dependent variations in bo...
Source
This website uses cookies.
We use cookies to improve your online experience. By continuing to use our website we assume you agree to the placement of these cookies.
To learn more, you can find in our Privacy Policy.