Comparison of nanofluid heat transfer properties with theory using generalized property relations for EG-water mixture

Here the investigations are done while distillation of ethanol-water mixture for separating ethanol from fermentation process. Focus is to study reduction in time required and hence saving in energy for the distillation process of ethanol-water mixture under the influence of surface-active agents (Surfactants). This novelty is from observation of these surfactants to enhance heat transfer rate because of surface tension reduction in aqueous solutions. SDS (Sodium Dodecyl Sulphate), NH4Cl (Ammonium Chloride) and SLBS (Sodium lauryl benzene sulphonate) surfactants in different concentration are experimented. The concentration of these surfactant is varied from 1700 ppm to 2800 ppm. This range is decided by observing critical micelle concentration of used surfactants. Results showed that time is reduced and hence energy consumption is also reduced. Results shown by NH4Cl are found to be more useful as it is ecofriendly surfactant which is not affecting ethanol-water mixture. Use of ammonium chloride as surfactant in distillation is actually useful to reduce energy without hampering the quality of process is the novelty of this work.

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Optimization of crystal quality by improving heat transfer properties of titanium carbide retort in the directional solidification

10.1063/5.0018439 ◽

2020 ◽

Author(s):

V. Kesavan ◽

M. Srinivasan ◽

P. Ramasamy

Keyword(s):

Heat Transfer ◽

Titanium Carbide ◽

Directional Solidification ◽

Crystal Quality ◽

Transfer Properties

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Boiling Heat Transfer Properties of Copper Surface with Different Microstructures

Materials Chemistry and Physics ◽

10.1016/j.matchemphys.2021.124589 ◽

2021 ◽

pp. 124589

Author(s):

Liying Wang ◽

Yonghua Wang ◽

Wen Cheng ◽

Huadong Yu ◽

Jinkai Xu

Keyword(s):

Heat Transfer ◽

Boiling Heat Transfer ◽

Copper Surface ◽

Transfer Properties

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Photothermal and Heat-Transfer Properties of Aqueous Detonation Nanodiamonds by Photothermal Microscopy and Transient Spectroscopy

The Journal of Physical Chemistry C ◽

10.1021/acs.jpcc.0c09329 ◽

2021 ◽

Vol 125 (14) ◽

pp. 7808-7823

Author(s):

Mikhail A. Proskurnin ◽

Liliya O. Usoltseva ◽

Dmitry S. Volkov ◽

Dmitry A. Nedosekin ◽

Mikhail V. Korobov ◽

...

Keyword(s):

Heat Transfer ◽

Detonation Nanodiamonds ◽

Photothermal Microscopy ◽

Transient Spectroscopy ◽

Transfer Properties

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A Control-Oriented Polytropic Model of SI Engine Intake Manifold

Dynamic Systems and Control, Volumes 1 and 2 ◽

10.1115/imece2003-41086 ◽

2003 ◽

Cited By ~ 6

Author(s):

Josˇko Deur ◽

Davor Hrovat ◽

Josˇko Petric´ ◽

Zˇeljko Sˇitum

Keyword(s):

Heat Transfer ◽

Intake Manifold ◽

Simple Extension ◽

Si Engine ◽

Polytropic Model ◽

Back Flow ◽

Thermal Transients ◽

Three State Model ◽

Transfer Properties ◽

Variant Structure

The paper presents experimental results which show significant changes of the intake manifold air temperature during fast tip-in/tip-out engine transients. An adequate two-state polytropic manifold model is developed and experimentally validated. An emphasis is on the derivation and parameterization of a time-variant structure of the heat transfer coefficient. The polytropic manifold model is extended to a three-state form for the more general case of different heat transfer properties for the manifold plenum and runners. An influence of the engine back flow on the runner thermal transients is observed. A simple extension of the three-state model with the back flow effect is proposed.

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Experimental and Numerical Study of Methanol-Water Mixture Single-Phase Heat Transfer in a Micro-Channel Heat Sink

Volume 2: Heat Transfer Enhancement for Practical Applications; Fire and Combustion; Multi-Phase Systems; Heat Transfer in Electronic Equipment; Low Temperature Heat Transfer; Computational Heat Transfer ◽

10.1115/ht2012-58477 ◽

2012 ◽

Author(s):

Chun K. Kwok ◽

Matthew M. Asada ◽

Jonathan R. Mita ◽

Weilin Qu

Keyword(s):

Heat Transfer ◽

Experimental Study ◽

Heat Sink ◽

Single Phase ◽

Numerical Study ◽

Pure Water ◽

Molar Fraction ◽

Water Mixture ◽

Micro Channel ◽

Numerical Predictions

This paper presents an experimental study of single-phase heat transfer characteristics of binary methanol-water mixtures in a micro-channel heat sink containing an array of 22 microchannels with 240μm × 630μm cross-section. Pure water, pure methanol, and five methanol-water mixtures with methanol molar fraction of 16%, 36%, 50%, 63% and 82% were tested. Key parametric trends were identified and discussed. The experimental study was complemented by a three-dimensional numerical simulation. Numerical predictions and experimental data are in good agreement with a mean absolute error (MAE) of 0.87%.

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