Saturated pool boiling heat transfer of acetone and HFE-7200 on modified surfaces by electrophoretic and electrochemical deposition

Wu, Zan; Cao, Zhenggang; Sundén, Bengt

doi:10.1016/j.apenergy.2019.04.160

Cited by 62 publications

(13 citation statements)

References 49 publications

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“…Significant demand for energy-intense heat exchangers for electronic devices has been observed in recent decades [36][37][38][39][40]. An important direction in increasing the efficiency of phase-transition cooling systems is application of coatings to change properties of surfaces on which the phase transition occurs [41][42][43], creation of a special geometry [44][45][46][47][48][49], and formation of micro-and nanoscale structures [50][51][52][53][54].…”

Section: Heat Transfer Enhancement and Critical Heat Fluxmentioning

confidence: 99%

Development of Methods for Heat Transfer Enhancement During Nitrogen Boiling to Ensure Stabilization of HTS Devices

Павленко

Кузнецов

2021

J. Engin. Thermophys.

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The paper presents a brief analysis of current achievements and key issues in the field of heat transfer and critical heat flux enhancement during boiling of cryogenic liquids and freons under various heat release laws via micro-structuring of the heat-generating surface. A review of new experimental data on the efficiency of heat transfer and critical heat flux enhancement during pool boiling via new micro-structured capillary-porous coatings created by plasma sputtering and selective laser melting/sintering (3D printing) is presented. The results of analysis of the efficiency of heat transfer and critical heat flux during boiling on heat-generating surfaces with micro-textures of different shapes and micro-profiling created by micro-deforming cutting are presented. New results obtained during nitrogen boiling under various hydrodynamical conditions on the mechanisms of sharp increase in the rate of non-stationary cooling of plates with new structured capillary-porous or low-heat-conductivity coatings with certain parameters are discussed. New results on the degree of heat transfer enhancement during boiling of liquids on micro-structured surfaces modified by the method of micro-arc oxidation are presented.

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Section: Heat Transfer Enhancement and Critical Heat Fluxmentioning

confidence: 99%

Development of Methods for Heat Transfer Enhancement During Nitrogen Boiling to Ensure Stabilization of HTS Devices

Павленко

Кузнецов

2021

J. Engin. Thermophys.

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“…In this study, microparticle coatings (MPC) and nanoparticle coatings (NPC) were fabricated by an electrochemical deposition method and an electrophoretic deposition method, respectively. Principles and setups of the deposition methods are introduced in [18]. In general, Cu 2þ and H þ ions from the electrolyte solution of copper sulfate (CuSO 4 ) and sulfuric acid (H 2 SO 4 ) were reduced on the smooth surface, generating MPC, while commercial nanoparticles were deposited on the smooth surfaces by an electric field, forming NPC.…”

Section: Surface Preparation and Characterizationmentioning

confidence: 99%

Pool Boiling of NOVEC-649 on Microparticle-Coated and Nanoparticle-Coated Surfaces

Cao

Sundén

2020

Heat Transfer Engineering

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In this study, microparticle coatings and nanoparticle coatings were fabricated on copper surfaces by an electrochemical deposition method and an electrophoretic deposition method, respectively. Pool boiling of NOVEC-649 was experimentally studied on the coated surfaces, concerning heat transfer, bubble dynamics, and critical heat fluxes. Compared with a smooth surface, heat transfer coefficients and critical heat flux (CHF) were improved, achieving a maximum heat transfer enhancement of 460% on the nanoparticle-coated surface and a maximum CHF enhancement of 60% on the microparticle-coated surface. Based on high speed visualizations, bubble departure diameters were measured and compared with several correlations, and then the heat transfer was analyzed by a mechanistic model, considering natural convection, transient heat conduction and microlayer evaporation. The mechanistic model demonstrated a good ability to predict the present results. In addition, wickability, representing a liquid supplement ability, was measured, indicating that the wickability enhancement was probably responsible for the CHF improvement.

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“…2) consisted of a cube vessel (6) of 5-mm-thick glass walls and overall dimensions 170 × 170 × 180 mm, which involves a borosilicate tube of 90 mm internal diameter (5), 180 mm height, and 6 mm wall thickness. The cube vessel and the tube were fixed between two plates of stainless steel AISI 316 (8,9). Inside the tube, there was a condenser made by a copper serpentine (4) and the element for confinement (12).…”

Section: Apparatus Assemblymentioning

confidence: 99%

“…Recently, some researchers [6][7][8][9] have shown for different working fluids that the pool boiling heat transfer is more pronounced on nanoparticle-coating surfaces, also improving the critical heat flux as compared to bare surfaces.…”

Section: Introductionmentioning

confidence: 99%

Influence of coated surfaces and gap size on boiling heat transfer of deionized water

Nunes

Souza

Rodrigues

et al. 2020

J Braz. Soc. Mech. Sci. Eng.

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Nanocoating techniques have been used to increase the heat transfer coefficient by changing the surface morphology, which could potentially increase the heat transfer in pool boiling systems. The present study aims to determine the influence of nanocoated surfaces and the gap size on the heat transfer coefficient and the critical heat flux during the pool boiling of deionized water, at saturation temperature in atmospheric pressure. Tests were performed on a copper heating bare surface with an average roughness of 0.330 μm. The nanocoated surfaces were produced by alumina (Al 2 O 3) nanoparticle deposition with 0.007% of volumetric concentration by using nanofluid boiling process. A gap size of 1.0 mm, corresponding to a Bond number equal to 0.4, was analyzed, and the results were compared with the cases without confinement. Concerning the heat transfer coefficient, the coated surface showed deterioration in the heat transfer performance (approximately 29%) as compared with the uncoated surface mainly due to the fouling resistance formed on the heating surface, confirmed by the surface characterization (SEM images). However, for coated surfaces and for confined cases, enhancement of 28% in the dryout heat flux was observed; the coating process significantly increases the surface wettability, which, in turn, increases the re-wetting capacity during the confined boiling process. Moreover, the heat transfer coefficient is more influenced by the gap size effect than the coating process. The chemical analysis showed that changes in the surface morphology occurred due to the effects of the confinement as compared to the original coated layer (the morphological aspect and melting mechanism were similar to the named liquid phase sintering).

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Saturated pool boiling heat transfer of acetone and HFE-7200 on modified surfaces by electrophoretic and electrochemical deposition

Cited by 62 publications

References 49 publications

Development of Methods for Heat Transfer Enhancement During Nitrogen Boiling to Ensure Stabilization of HTS Devices

Development of Methods for Heat Transfer Enhancement During Nitrogen Boiling to Ensure Stabilization of HTS Devices

Pool Boiling of NOVEC-649 on Microparticle-Coated and Nanoparticle-Coated Surfaces

Influence of coated surfaces and gap size on boiling heat transfer of deionized water

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