Heat Transfer Performance of Propylene Glycol Versus Ethylene Glycol Coolant Solutions in Laboratory Testing

JuGer, Joseph J.; Crook, Richard F.

doi:10.4271/1999-01-0129

Cited by 9 publications

(5 citation statements)

References 5 publications

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“…Their conclusions were assessed by numerical and experimental work. Juger and Crook [2] reported an experimental testing on two radiators of the same flow area but with the tubes in vertical or horizontal position, therefore studying the influence of tube length vs. number of parallel tubes. They carried out this analysis for three different coolant fluids.…”

Section: Introductionmentioning

confidence: 99%

Parametric studies on automotive radiators

Oliet

Oliva

González

et al. 2007

Applied Thermal Engineering

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Section: Introductionmentioning

confidence: 99%

Parametric studies on automotive radiators

Oliet

Oliva

González

et al. 2007

Applied Thermal Engineering

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“…The primary liquid used for this study is de-ionized (DI) water (, and ), while for a limited set of experiments, an ethanol–DI water mixture ( w/w mixture, , and ; Vazquez, Alvarez & Navaza 1995; Phan 2021) was used. It is to be noted that liquids with properties similar to water and ethanol are often used for cooling, coating and disinfection applications (JuGer & Crook 1999; Parke & Birch 1999; Kandlikar & Bulut 2003; Ukiwe & Kwok 2005; Krainer, Smit & Hirn 2019). The Reynolds number (, defined in (1.1 a – c )) and Weber number (, defined in (1.1 a – c )) used for this study span the ranges and , respectively.…”

Section: Experimental Set-upmentioning

confidence: 99%

Spreading dynamics of droplets impacting on oscillating hydrophobic substrates

Potnis,

Saha

2024

J. Fluid Mech.

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Droplet impact on oscillating substrates is important for both natural and industrial processes. Recognizing the importance of the dynamics that arises from the interplay between droplet transport and substrate motion, in this work, we present an experimental investigation of the spreading of a droplet impacting a sinusoidally oscillating hydrophobic substrate. We focus particularly on the maximum spread of droplets as a function of various parameters of substrate oscillation. We first quantify the maximum spreading diameter attained by the droplets as a function of frequency, amplitude of vibration, and phase at the impact for various impact velocities. We highlight that there can be two stages of spreading. Stage I, which is observed at all impact conditions, is controlled by the droplet inertia and affected by the substrate oscillation. For certain conditions, a Stage II spreading is also observed, which occurs during the retraction process of Stage I due to additional energies imparted by the substrate oscillation. Subsequently, we derive scaling analyses to predict the maximum spreading diameters and the time for this maximum spread for both Stage I and Stage II. Furthermore, we identify the necessary condition for Stage II spreading to be greater than Stage I spreading. The results will enable optimization of the parameters in applications where substrate oscillation is used to control the droplet spread, and thus heat and mass transfer between the droplet and the substrate.

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“…They observed that upon increasing the concentration of PG in water from 25 to 75%, an improvement in the efficiency of the solar cell occurs. Jugar and Crook 31 compared the performance of PG and EG with their different concentrations in water and concluded that it is necessary to maintain a 50/50 concentration of water and antifreeze in order to keep a balance between heat transfer properties and antifreeze protection.…”

Section: Introductionmentioning

confidence: 99%

Electroosmotically actuated peristaltic-ciliary flow of propylene glycol + water conveying titania nanoparticles

Akram

Akbar

2023

Sci Rep

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The main focus of this article is to mathematically formulate the microfluidics-based mechanical system for nanofluids. A 50:50 mixture of propylene glycol (PG) and water is used as a heat transfer fluid because of its tremendous anti-freezing properties, and nontoxicity and it is safe to be utilized at the domestic level. Titanium dioxide (titania) nanoparticles are suspended in the working fluid to enhance its heat transfer ability. The fluid flow is induced by electroosmosis in a microtube, which is further assisted by cilia beating. The impacts of Joule heating and non-linear thermal radiation are also considered. The simplification of the dimensionless system is done under lubrication theory and the Debye-Hückel linearization principle. The nonlinear system of equations is executed for a numerical solution by adopting the symbolic mathematical software Maple 17 using the command “dsolve” along with the additional command “numeric” to get the numerical solution. This command utilizes a low-ordered method along with accuracy-enhancing schemes such as the deferred correction technique and Richardson extrapolation to get a numerical answer of desired accuracy, where we can choose the accuracy level and mesh points according to our requirements. The detailed analysis of results obtained from the numerical treatment of the considered problem indicates that the efficiency of the PG + water enhances due to the suspension of the nanoparticles and heat is rapidly removed from the system. Further, the velocity of the fluid is augmented by decreasing the thickness of the electric double layer and raising the strength of the electric field in the forwarding direction.

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Heat Transfer Performance of Propylene Glycol Versus Ethylene Glycol Coolant Solutions in Laboratory Testing

Cited by 9 publications

References 5 publications

Parametric studies on automotive radiators

Parametric studies on automotive radiators

Spreading dynamics of droplets impacting on oscillating hydrophobic substrates

Electroosmotically actuated peristaltic-ciliary flow of propylene glycol + water conveying titania nanoparticles

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