Improving Heat Transfer in Hybrid Solar Systems Using Liquid Metal Alloys as a Coolant

Prabu, T.; Sekar, C. Ajay

doi:10.1115/1.4037821

Cited by 5 publications

(2 citation statements)

References 11 publications

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“…Since 1970 a worldwide effort has been underway to increase the durability, resilience and thermal efficiency of solar collector systems. Solar technology has subsequently infiltrated a vast array of devices including solar ponds [2], solar absorption chillers [3], solar towers [4], solar cooling systems [5], CHP refrigeration solar hybrid plants [6], solar-petrochemical steam control plants [7], green buildings (photovoltaic facades) [8] and solar automobiles [9]. Another important application of solar technology is the solar-powered pump [10] which has many uses including heating, waste transport, medical fermentation batch processing etc.…”

Section: Introductionmentioning

confidence: 99%

Peristaltic pumping of magnetic nanofluids with thermal radiation and temperature-dependent viscosity effects: Modelling a solar magneto-biomimetic nanopump

et al. 2019

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Nanofluids have shown significant promise in the thermal enhancement of many industrial systems. They have been developed extensively in energy applications in recent years. Solar energy systems are one of the most promising renewables available to humanity and these are increasingly being redesigned to benefit from nanofluids. Most designs of solar collectors involve fixed (rigid) geometries which may be cylindrical, parabolic, tubular or flat-plate types. Modern developments in biomimetics have identified that deformable conduit structures may be beneficial for sustainable energy systems. Motivated by these aspects, in the current work we present a novel model for simulating a biomimetic peristaltic solar magnetohydrodynamic nanofluid-based pump. The working fluid is a magnetized nanofluid which comprises a base fluid containing suspended magnetic nano-particles. The novelty of the present work is the amalgamation of biomimetics (peristaltic propulsion), magnetohydrodynamics and nanofluid dynamics to produce a hybrid solar pump system model. Heat is transferred via distensibility of the conduit in the form of peristaltic thermal waves and buoyancy effects. An externally applied magnetic field achieves the necessary circuit design for generating Lorentzian magnetic body force in the fluid. A variable viscosity modification of the Buongiorno nanofluid model is employed which features thermophoretic body force and Brownian dynamic effects. To simulate solar loading conditions a thermal radiative flux model is also deployed. An asymmetric porous channel is investigated with multiple amplitudes and phases for the wall wavy motion. The channel also contains a homogenous, isotropic porous medium which is simulated with a modified Darcy model. Heat generation/absorption effects are also examined. The electrically-conducting nature of the nanofluid invokes magnetohydrodynamic effects. The moving boundary value problem is normalized and linearized using the lubrication approach. Analytical solutions are derived for axial velocity, temperature and nanoparticle volume fraction. Validation is conducted with Maple numerical quadrature. Furthermore, the salient features of pumping and trapping phenomena discourse briefly. The observations demonstrate promising features of the solar magnetohydrodynamic peristaltic nanofluid pump which may also be exploited in spacecraft applications, biological smart drug delivery etc.

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Section: Introductionmentioning

confidence: 99%

Peristaltic pumping of magnetic nanofluids with thermal radiation and temperature-dependent viscosity effects: Modelling a solar magneto-biomimetic nanopump

et al. 2019

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“…Some extremely diverse applications of this technology include solar magneto-nanofluid-heat pipes (MNHPs), 1 sedimentation control of arc-submerged nanoparticle synthesis systems (ASNSSs) with magnetic fields, 2 critical heat flux elevation with magnetic nanofluids in phase change processes, 3 droplet vaporization time modification in novel rocket combustion systems via magnetized nanofluids, 4 thermal tribology 5 and solar collector magnetic nanopolymer working fluids . 6,7 In parallel with substantial experimental work, a rich literature has also developed focused on theoretical and computational simulations of magneto-nanofluid dynamic processes. Rarani et al 8 used computational fluid dynamics (CFD) simulations to evaluate the effect of electromagnetic fields on viscous properties of iron oxide-ethylene glycol magnetized nanofluids.…”

Section: Introductionmentioning

confidence: 99%

Modeling magnetic nanopolymer flow with induction and nanoparticle solid volume fraction effects: Solar magnetic nanopolymer fabrication simulation

Bég

Kuharat

Ferdows

et al. 2019

Proceedings of the Institution of Mechanical Engineers, Part N:

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A mathematical model is presented for the nonlinear steady, forced convection, hydromagnetic flow of electro-conductive magnetic nano-polymer with magnetic induction effects included. The transformed two-parameter, non-dimensional governing partial differential equations for mass, momentum, magnetic induction and heat conservation are solved with the local non-similarity method (LNM) subject to appropriate boundary conditions. Keller's implicit finite difference "box" method (KBM) is used to validate solutions. Computations for four different nanoparticles and three different base fluids are included. Silver nanoparticles in combination with various base fluids enhance temperatures and induced magnetic field and accelerate the flow. An elevation in magnetic body force number decelerates the flow whereas an increase in magnetic Prandtl number elevates the magnetic induction. Furthermore, increasing nanoparticle solid volume fraction is found to substantially boost temperatures. Applications of the study arise in advanced magnetic solar nano-materials (fluids) processing technologies.

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Evaluation on the Performance of Photovoltaic–Thermal Hybrid System Using CO2 as a Working Fluid

Pumaneratkul

Yamasaki

Yamaguchi

et al. 2018

Journal of Solar Energy Engineering

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In this study, the CO2-based photovoltaic–thermal hybrid system has been investigated with an objective to increase the power generation efficiency in photovoltaic solar panel and to improve the performance of supercritical CO2 solar Rankine cycle system (SRCS). From a previous study, an improvement of 2% of power generation efficiency was confirmed via experimental investigation. In this study, the temperature distribution on the CO2-based photovoltaic–thermal hybrid system has been numerically and experimentally investigated and confirmed with referenced experimental results. Particularly, in this study, the one-dimensional (1D) calculation of CO2 flow in the cooling tube and three-dimensional (3D) calculation of temperature distribution on the surface of the photovoltaic solar panel are conducted. The typical summer and winter weather conditions are used as the calculation references to investigate the effect of temperature distribution of the photovoltaic solar panel. The results show that the trend of temperature distribution from calculation was confirmed with the experimental data both in summer and winter conditions. Furthermore, in summer condition, the CO2 temperature was increased to a maximum of 28 °C.

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Improving Heat Transfer in Hybrid Solar Systems Using Liquid Metal Alloys as a Coolant

Cited by 5 publications

References 11 publications

Peristaltic pumping of magnetic nanofluids with thermal radiation and temperature-dependent viscosity effects: Modelling a solar magneto-biomimetic nanopump

Peristaltic pumping of magnetic nanofluids with thermal radiation and temperature-dependent viscosity effects: Modelling a solar magneto-biomimetic nanopump

Modeling magnetic nanopolymer flow with induction and nanoparticle solid volume fraction effects: Solar magnetic nanopolymer fabrication simulation

Evaluation on the Performance of Photovoltaic–Thermal Hybrid System Using CO2 as a Working Fluid

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