Simulation and optimization of pulsating heat pipe flat-plate solar collectors using neural networks and genetic algorithm: a semi-experimental investigation

Jalilian, Farid Azizi; Kargarsharifabad, Hadi; Godarzi, Ali Abbasi; Ghofrani, Ali; Shafii, Mohammad Behshad

doi:10.1007/s10098-016-1143-x

Cited by 33 publications

(10 citation statements)

References 22 publications

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“…One mentions that the heat advection inside the plug is neglected in Eq. (11). This is justified by the fact that, in general, the channel is thin, so the radial heat exchange (last term) is much stronger than the axial advection.…”

Section: Heat Transfer Modeling In Phpmentioning

confidence: 99%

“…Because of the lack of PHP understanding, it is not even clear which dimensionless groups are the most important, and which groups can be omitted from the analysis. In some works, another empirical approach based on the training of the artificial neural networks (ANN) of different complexity is used [9][10][11][12].…”

Section: Introduction To the Php Predictive Modelingmentioning

confidence: 99%

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Physical principles and state-of-the-art of modeling of the pulsating heat pipe: A review

Nikolayev

2021

Applied Thermal Engineering

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The Pulsating (called also oscillating) Heat Pipe (PHP) is a high performance passive heat transfer device. It consists in a closed capillary channel folded into several meanders, evacuated, and partially filled with a liquid and its vapor. One side is in thermal contact with a hot spot, the other with a cold spot. The oscillation of the liquid plugs and vapor bubbles spontaneously occurs after the heating beginning. The heat exchange takes place not only by latent heat transfer, but also by liquid convection. Both this advantage and the PHP structural simplicity make it competitive with respect to other kinds of heat pipes. However, the PHP operation is non-stationary and depends on many physical and material parameters. As a result, application of empirical correlations is quite unsuccessful. More sophisticated direct modeling is thus required. In this review, we present the past, present, and future perspectives of the theoretical PHP studies. The physical phenomena on the level of a single bubble and single liquid plug is addressed first. In this context, the modeling of the simplest, single branch PHP is described as a necessary first step toward the PHP understanding and model validation. The modeling of interaction between the bubbles and plugs (bubble generation and disappearance, plug evaporation) is discussed next. Finally, the state of the art of the physical modeling and simulation of the multi-turn PHP is reviewed and the difference between existing approaches is explained.

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Section: Heat Transfer Modeling In Phpmentioning

confidence: 99%

Section: Introduction To the Php Predictive Modelingmentioning

confidence: 99%

Physical principles and state-of-the-art of modeling of the pulsating heat pipe: A review

Nikolayev

2021

Applied Thermal Engineering

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“…In a semi-experimental study, the behavior of PHPs in a flat plate solar water heater was investigated using a two-layer artificial neural network method and genetic algorithm [130].…”

Section: Active Solar Water Heating Systemsmentioning

confidence: 99%

A review of latest developments, progress, and applications of heat pipe solar collectors

Shafieian

Khiadani

Nosrati

2018

Renewable and Sustainable Energy Reviews

142

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Among all the available solutions to the current high energy demand and consequent economic and environmental problems, solar energy, without any doubt, is one of the most promising and widespread solutions. However, conventional solar systems face some intractable challenges affecting their technical performance and economic feasibility. To overcome these challenges, increasing attention has been drawn towards the utilization of heat pipes, as an efficient heat transfer technology, in conventional solar systems. To the authors' knowledge, despite many valuable studies on heat pipe solar collectors (mainly during the last decade), a comprehensive review which surveys and summarizes those studies and identifies the research gaps in this field has not been published to date. This review paper provides an overview of the recent studies on heat pipe solar collectors (HPSCs), their utilization in different domestic, industrial, and innovative applications, challenges, and future research potentials. The concept and principles of HPSCs are first introduced and a review of the previous studies to improve both energy efficiency and cost effectiveness of these collectors is presented. Moreover, a concise section is dedicated to mathematical modeling to demonstrate suitable methods for simulating the performance of HPSCs. Also, the latest applications of HPSCs in water heating, desalination, space heating, and electricity generation systems are reviewed, and finally, some recommendations for future research directions, regarding both development and new applications, are made.

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“…It is a unwicked passive heat pipe which has zigzag capillary tubes. It has huge applications in electronic industries [2]- [5], aerospace, Air conditioning [6], automobile technology [7]- [9]. Following are the advantages 1) wickless structure 2) high heat transfer capacity Shang et al [10] 3) simple and compact design which made the device to use in various places in engineering applications 4) costless which lead to good amount of experiments and made the researchers easy to have keen interest.…”

Section: Introductionmentioning

confidence: 99%

A review on Mechanism of fluid flow and Transfer of Heat in Closed Loop Pulsating Heat Pipe

Javvadi¹,

Bhramara

Gangam³

et al. 2020

E3S Web Conf.

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Now-a-days the researchers and people are moving towards such an innovation which meet the needs of the present without compromising the ability of future generations to meet their own needs. In such innovations Pulsating heat pipe is one of the technology which started in 1990 by Akachi. Pulsating heat pipe is a heat transfer device which has an effective heat transfer capability. The researchers had done many experimental and theoretical investigations, but they haven’t got the complete knowledge about it because of its complex operational mechanism which consists of hydrodynamic and thermodynamic coupling effect. This paper gives a brief idea on the thermo-hydro dynamic characteristics of this device. The brief idea will be on internal diameter, cross-section of the tube and the amount of working fluid in system. In addition to all these the number of turns in device and thermo-physical properties of working fluid which leads to determine the thermal behavior. The motto of this paper is to make review paper on recent past years on papers which used refrigerants as working fluids and its fluid flow mechanism and finally lead upcoming researchers to have basic idea and future scope of device.

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Simulation and optimization of pulsating heat pipe flat-plate solar collectors using neural networks and genetic algorithm: a semi-experimental investigation

Cited by 33 publications

References 22 publications

Physical principles and state-of-the-art of modeling of the pulsating heat pipe: A review

Physical principles and state-of-the-art of modeling of the pulsating heat pipe: A review

A review of latest developments, progress, and applications of heat pipe solar collectors

A review on Mechanism of fluid flow and Transfer of Heat in Closed Loop Pulsating Heat Pipe

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