Abstract
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.
Highlights
Since enhancing critical heat flux (CHF) of industrial boilers through surface modification can result in vital energy savings and global reduction in greenhouse gas emissions, Dhillon et al [14] scrutinized the influence of CHF maxima during boiling crisis on textured surfaces
Use of alumina and copper nanofluids the experimental of pool investigations concerning theThe nanoparticle deposition on theinheater surfacetests after boiling, it was experiments resulted in the respective CHF amelioration of 171% and 176% compared to inferred thatboiling heat flux improvement can be achieved at lower concentrations
The present study is an overview on the CHF amelioration of pool boiling surfaces through the use of metal oxide nanoparticles deposition
Summary
Pool boiling is proposed as a beneficial method for the transfer of high thermal energy in various applications of industry, such as refrigeration, cooling electronic chips as well as nuclear reactor cooling, the generation of thermal power and the conversion of energy. To enhance the boiling heat transfer, HTC should be maximized, in surface temperature. To enhance the boiling heat transfer, HTC should be which would lead to a growth in CHF. Considering the conditions and environments in which happens, diverse titles can be utilized to refer to CHF, including boiling crisis, burnout heatCHF flux, happens, titles can be utilized to refer to CHF. CHF,point, including boilingdecline crisis, would burnout heatinflux, departurediverse from nuclear boiling, or dryout. Since there is a direct relationship between the boiling limit and physical burnout of the the heated surface, keeping CHF in a credible limit is crucial for ensuring the safety of the heated system surface,. Figure, boiling heat transfer, the target to maximize the permissible limit wellasaswell rising that is defined by a localbydifference on the curve.
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