Review of critical-heat-flux enhancement methods

Xie, Shangzhen; Beni, Mehrdad Shahmohammadi; Cai, Jie; Zhao, Jiyun

doi:10.1016/j.ijheatmasstransfer.2018.01.116

Cited by 75 publications

(10 citation statements)

References 113 publications

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“…Sulfolobus solfataricus is a hyperthermophilic sulfur metabolizing archaeon, which belongs to Crenarchaeota phylum. This species grows best at temperatures around 80° C and highly acidic pH (2)(3)(4). Sulfolobus solfataricus essentially metabolizes sulfur as a main cellular metabolism.…”

Section: Sulfolobus Solfataricus Culturementioning

confidence: 99%

“…The end of the nucleate boiling region is described by excessive generated vapor columns and blankets, which block the coolant path to the surface, thereby leading to boiling crisis or critical heat flux (CHF). As indicated in Figure 1, boiling heat transfer enhancement can be achieved by i) reducing ONB temperature, ii) improving heat transfer coefficient (HTC), and iii) increasing CHF [4]. Many surface modification techniques [5], [6] have been proposed and investigated to achieve these goals.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Bio-coated surfaces with micro-roughness and micro-porosity: Next generation coatings for enhanced energy efficiency

Niazi

Sadaghiani

Gharıb

et al. 2021

Energy

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Due to growing cooling demands as well as emerging global warming and climate change issues, cooling systems should be more efficiently utilized. Boiling is an effective heat transfer mechanism, which has a critical role in many cooling systems. Surface modification is considered as the major approach for boiling heat transfer enhancement. In this study, we developed a microbial bio-coating surface modification technique for phase change cooling applications.Thermoacidophilic Sulfolobus solfataricus coating was implemented using a facile dip coating method on different metallic and non-metallic surfaces. Controlled by drying conditions, the coating exhibited rough and porous morphologies. When tested in a boiling heat transfer setup, bio-coated surfaces offered enhancements up to 76.3% in Critical Heat Flux (CHF). Next, a miniature evaporator was coated and tested for real-world air-conditioning applications, and coefficient of performance (COP) enhancements up to 11% clearly revealed the potential of biocoated surfaces for energy saving purpose and reduction in greenhouse gasses. Furthermore, coated evaporators reduced the exergy destruction rate up to 8%. This study not only offers a new type of coating morphology, but the applicability of the proposed bio-coating is also proven in a miniature air conditioning system.

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Section: Sulfolobus Solfataricus Culturementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Bio-coated surfaces with micro-roughness and micro-porosity: Next generation coatings for enhanced energy efficiency

Niazi

Sadaghiani

Gharıb

et al. 2021

Energy

View full text Add to dashboard Cite

show abstract

“…Altering the working fluids can be considered as a primary way for CHF enhancement. Several research studies were conducted on the replacement of different fluids, including Freon-12 or Freon-134a with water in the early 1990s [15]. Improving the properties of the base fluid with nanoparticles is regarded as another useful solution of heat transfer enhancement.…”

Section: Chf Enhancement By Ameliorating Fluid Properties With Nanoparticlesmentioning

confidence: 99%

Recent Advances in the Critical Heat Flux Amelioration of Pool Boiling Surfaces Using Metal Oxide Nanoparticle Deposition

et al. 2020

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Pool boiling is an effective heat transfer process in a wide range of applications related to energy conversion, including power generation, solar collectors, cooling systems, refrigeration and air conditioning. By considering the broad range of applications, any improvement in higher heat-removal yield can ameliorate the ultimate heat usage and delay or even avoid the occurrence of system failures, thus leading to remarkable economic, environmental and energy efficiency outcomes. A century of research on ameliorating critical heat flux (CHF) has focused on altering the boiling surface characteristics, such as its nucleation site density, wettability, wickability and heat transfer area, by many innovative techniques. Due to the remarkable interest of using nanoparticle deposition on boiling surfaces, this review is targeted towards investigating whether or not metal oxide nanoparticles can modify surface characteristics to enhance the CHF. The influence of nanoparticle material, thermo-physical properties, concentration, shape, and size are categorized, and the inconsistency or contradictions of the existing research results are recognized. In the following, nanoparticle deposition methods are presented to provide a worthwhile alternative to deposition rather than nanofluid boiling. Furthermore, possible mechanisms and models are identified to explain the amelioration results. Finally, the present status of nanoparticle deposition for CHF amelioration, along with their future challenges, amelioration potentials, limitations, and their possible industrial implementation, is discussed.

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“…Xie et al [27] introduced a review on CHF intensifying methods, and one of those methods was adding nanoparticles to working fluids, which is termed nanofluids. They have discussed the approach considering the improvement of thermal properties of the liquid by suspending nanoparticles to conventional fluids for both types of boiling, pool and flow boiling heat transfer.…”

Section: Recent Review Papers Related To the Boiling Of Nanofluidsmentioning

confidence: 99%

Experimental studies of flow boiling heat transfer by using nanofluids

Kamel

Lezsovits

Hussein

2019

J Therm Anal Calorim

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Flow boiling heat transfer widely utilized in numerous industrial applications such as boiler tubes, evaporators and cooling of reactors in a nuclear power plant. Nanofluids are a new category of thermal fluids, made by dispersing a nanometer solid particle which is usually less than 100 nm into conventional liquids such as water, oil engine and ethylene glycol with the intent to enhance the thermal properties of the base fluids. This work reviews the recent experimental studies focusing on the flow boiling heat transfer using nanofluids. The latest results associated with this subject are presented and outlined to account the influence of several parameters, which are related to operating conditions and nanoparticles morphology on the heat transfer coefficient and the critical heat flux. Besides, the effects of nanoparticles on other related sub-phenomenon of the flow boiling by using nanofluids were discussed. Moreover, the latest review papers of the related topic were presented and briefly discussed. Finally, suggestions for future research activities related to this field were also concisely listed.

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Review of critical-heat-flux enhancement methods

Cited by 75 publications

References 113 publications

Bio-coated surfaces with micro-roughness and micro-porosity: Next generation coatings for enhanced energy efficiency

Bio-coated surfaces with micro-roughness and micro-porosity: Next generation coatings for enhanced energy efficiency

Recent Advances in the Critical Heat Flux Amelioration of Pool Boiling Surfaces Using Metal Oxide Nanoparticle Deposition

Experimental studies of flow boiling heat transfer by using nanofluids

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