The study of entropy generation during flow boiling in a micro-fin tube

Abdous, Mohammad Ali; Saffari, Hamid; Avval, Hasan Barzegar; Khoshzat, Mohsen

doi:10.1016/j.ijrefrig.2016.04.008

Cited by 22 publications

(11 citation statements)

References 40 publications

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Section: Entropy Generation Rate In Single-phase and Multiphase Flows In Microchannelsmentioning

confidence: 99%

“…Recently, several investigations have been done in this area [7,26,27,32,[63][64][65][66]. The analysis of entropy generation rate of single-phase flows in microchannels [7,26,27,32,[63][64][65] is fairly straightforward compare to that of multiphase flows [47,65,66]. In both of these categories, the entropy generation rate is either evaluated by solving ordinary or partial differential equations, i.e., sub-system modeling [26,27,32] or by simple algebraic equations, i.e., system modeling [7,47,65].…”

Section: Entropy Generation Rate In Single-phase and Multiphase Flows In Microchannelsmentioning

confidence: 99%

Section: Entropy Generation Rate In Multiphase Flowsmentioning

confidence: 99%

“…A few studies on second law analysis of multiphase flow in microchannels are available in the literature, but these have recently attracted some additional attention [47,65,66]. As mentioned previously, these investigations have been primarily focused at the system level, and hence there are no partial differential equations to be considered [47,65,66]. As these analyses considered algebraic equations for determination of the entropy generation rate in the microchannels, the total entropy generation rate can be readily obtained [47,65].…”

Section: Entropy Generation Rate In Multiphase Flowsmentioning

confidence: 99%

“…Based on this study, it is apparent that the entropy generation rate remains constant with augmenting mass flow rate and goes up with increasing heat flux. In a numerical investigation [66],…”

Section: Entropy Generation Rate In Multiphase Flowsmentioning

confidence: 99%

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Generation of entropy in micro thermofluidic and thermochemical energy systems-A critical review

Torabi

Karimi

Torabi

et al. 2020

International Journal of Heat and Mass Transfer

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Micro energy systems have progressed significantly over the last two decades, as has the utilization of micro thermofluidic and thermochemical systems. Several studies were conducted to analyze the thermophysical and chemical characteristics of these systems. In general, the large rates of heat and mass transfer typically encountered in these microsystems make them susceptible to significant irreversibilities and as a result, poor second-law performances. Although the understanding and modelling of entropy generation rate in microsystems is an inevitable part of their performance analyses, no reviews were found on the second law analysis, and more specifically on the entropy generation rate of micro thermal and thermochemical systems.To address this shortcoming, the current review explores the mechanisms of entropy generation rate in these micro energy systems and identifies the possible future avenues of research in this field. The existing literature on entropy generation rate in micro single and multiphase thermofluidic systems, with the inclusion of various effects such as magnetic and electric fields, nanoparticles and thermochemical reactions are reviewed in detail. The unexplored and less investigated areas such as second law analysis of micro porous systems using pore-scale modeling and entropy generation rate of airflow through microchannels with inserts are identified, and recommendations are made for future research.

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