Frost formation as a temporary enhancer for quench pool boiling

Mazor, G.; Korin, Eli; Nemirovsky, D.; Ladizhensky, Izhak

doi:10.1016/j.applthermaleng.2012.11.048

Cited by 20 publications

(3 citation statements)

References 28 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The copper ball's quench pool boiling in liquid nitrogen was researched by us earlier [19]. The experiments with an uncoated copper ball in the present research differ from previous work only by the initial cooling temperature of 500 K. Heat flux density and surface temperature, as functions of time, are presented in Fig.…”

Section: Experiments With a Sample Without Heat Transfer Enhancermentioning

confidence: 97%

See 1 more Smart Citation

Quench Pool Boiling with Temporary Crystalline Enhancers

et al. 2014

Self Cite

View full text Add to dashboard Cite

In some industrial activities, the use of permanent heat transfer enhancements such as metal coating, pins, and grooves in cryogenic treatment is quite problematic. Such permanent heat transfer enhancers were replaced with temporary enhancers made of different crystalline materials, here focusing on NaCl, MgSO 4 ·7H 2 O, CaCl 2 ·2H 2 O, and C 6 H 5 Na 3 O 7 ·2H 2 O, which were used during quenching of the sample in the cryogenic liquid, i.e., nitrogen. The time required for sample cooling until the liquid nitrogen saturation temperature is reached decreases significantly when a crystalline coating is applied. The dependence of the cooling time on temporary coating creation parameters such as solution concentration, initial temperature of the sample, and solution spreading time is discussed.

show abstract

Section: Experiments With a Sample Without Heat Transfer Enhancermentioning

confidence: 97%

“…In the past, a frost coating [19] that can be produced from the interaction of previously cooled surfaces with moist environmental air was offered and tested. This coating satisfies all the requirements mentioned above and allows intensification of the boiling process.…”

mentioning

confidence: 99%

Quench Pool Boiling with Temporary Crystalline Enhancers

et al. 2014

Self Cite

View full text Add to dashboard Cite

show abstract

“…Nonmetallic coatings include fibrous materials, corundum (Al 2 O 3 ), nichrome (NiCr), and tetrafluoroethylene . We have previously proposed several methods for creating temporary intensifying heat exchange coatings based on frost obtained from moist air and crystallization of salts, which significantly increased the rate of heat transfer during boiling. At the same time, this possibility is also available with the use of hybrid intensifying surfaces that combine both a heat‐insulating layer and a structure of powder particles, which are additional boiling points.…”

Section: Introductionmentioning

confidence: 99%

Modification of pool boiling regimes by sand deposition

et al. 2019

Self Cite

View full text Add to dashboard Cite

Sand spots, attached to a copper ball surface by means of polyvinyl acetate adhesive and distributed over the surface with areal density that ranges between one spot per 1.18 cm 2 (for low-density spots) and one spot per 0.51 cm 2 (for high-density spots), serve as a temporary heat transfer enhancer during the quenching in liquid nitrogen. Highest heat flux densities, achieved during quenching, lie in the range 10.8 to 20.2 W/cm 2 , depending on the sand layer structure.Application of the temporary enhancer increases an amount of heat, evacuated by highly effective nucleate and transition boiling, by factor of 4.5 as compared with the bare sample. The process of sand layer preparation, data acquisition peculiarities, relationship between heat exchange efficiency and the spots areal density, along with sand grit size are discussed in this paper. K E Y W O R D Sheat transfer enhancement, nucleate boiling, temporary enhancer

show abstract