Numerical modelling of heat accumulator performance at storage of solar energy

Dmitry, Soloviev; Liubov, Shilova

doi:10.1016/j.ijft.2022.100268

Cited by 7 publications

(7 citation statements)

References 16 publications

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“…It provides us a simple way to adjust and control the convergence region of solution series by choosing proper value of auxiliary parameter h, auxiliary function and linear operator. By utilizing the HAM method, the highly nonlinear ODE's (9-12), along with their corresponding boundary conditions (13), can be manipulated to derive an analytical solution. For this the initial guess and linear operator are discoursed as,…”

Section: Solution Methodologymentioning

confidence: 99%

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Applications of solar thermal radiation in a bio‐convective Eyring–Powell hybrid nanofluid flow under the influence of electro‐magnetohydrodynamics near a stagnation point: An irreversibility study

Junaid,

Aslam,

Zhang

2024

Z Angew Math Mech

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In this study, we investigate the electromagnetohydrodynamic (EMHD) Eyring–Powell hybrid Nanofluid flowing through a stretching surface, with the effects of copper , aluminum oxide nanoparticles and gyrotactic motile microorganism with polyvinyl alcohol‐water as a base fluid. Heat transfer, joule heating, solar radiation, mass transmission, and entropy generation effects are analyzed on the fluid flow. A numerical model with an analytical methodology for the description of fluid flow and thermal properties of a parabolic trough solar collector (PTSC) installed on a solar plate is underway as the use of solar plates in many devices going to expand. The governing partial differential equations (PDEs) are transformed into ordinary differential equations (ODEs) by using similarity transformations. The higher‐order ODEs are then solved using the analytical scheme known as the homotopy analysis method (HAM) in MATHEMATICA. The effects of different parameters such as magnetic field, electric field, Prandtl number, Eckert number, bioconvection diffusion, Lewis number, chemical reaction parameter, bioconvection, and Grashof number are analyzed with flow characteristics graphically. The velocity of the fluid shows a decrement due to the radiation parameter, Grashof number, and Solutal Grashof number. Thermodynamic properties of the fluid are enhanced with the Prandtl number, Eckert number, and electric and magnetic field. The entropy of the fluid increases with the Prandtl number, Eckert number, and diffusion parameter. Bejan number rises due to diffusion and bioconvection diffusion parameters. The study is about the mathematical analysis of Eyring Powell fluid flowing through a PTSC with the addition of a motile microorganism. PTSC are a main source of energy production for many sectors. Nanoparticles of copper and aluminum oxide are mixed to raise the thermal properties of the fluid used for electricity production engines, solar energy systems, cooling devices. Solar radiation effect, Joule heating, and viscous dissipation are analyzed for the energy production devices.

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Section: Solution Methodologymentioning

confidence: 99%

“…For heating needs 200 to 300 • C, to keep the dairy items needs 4 to 200 • C temperature. Dmitry and Liubov [13] studied solar energy storage and heat accumulator performance. Nowadays building materials are made up of heat accumulator elements.…”

Section: Introductionmentioning

confidence: 99%

Applications of solar thermal radiation in a bio‐convective Eyring–Powell hybrid nanofluid flow under the influence of electro‐magnetohydrodynamics near a stagnation point: An irreversibility study

Junaid,

Aslam,

Zhang

2024

Z Angew Math Mech

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“…Methods to compute operating modes based on numerical models are needed to increase efficiency and dependability. They examined the fundamentals of developing heat storage devices based on various heat storage medium in the article [17] . A numerical solution program was created together with a mathematical model of the solar heat storage tank.…”

Section: Heat Accumulators In the Storage Of Solar Energymentioning

confidence: 99%

“…They are employed to deal with the problems of diurnal periodicity, erratic solar energy supply, and ongoing heating energy supply. Heat accumulators also offer sky coverage and load coverage at night [17] . When compared to lithium iron phosphate batteries (LIPB), using thermal storage batteries dramatically lessens the environmental impact across eight comparison categories.…”

Section: Heat Accumulators In the Storage Of Solar Energymentioning

confidence: 99%

Technologies for heating sports facilities

Brunskole,

Stritih

2023

Int. J. Phys. Educ. Sports Health

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An active lifestyle is essential for maintaining a healthy heart, body, and mind. To satisfy WHO [1] standards, every fourth adult worldwide does not engage in enough physical exercise. As physical exercise has been shown to improve public health, disease prevention, and society's competitiveness, it has become more widely recognized as being important since the COVID-19 pandemic. Between 2000 and 2019 [2, 3, 4], the world's life expectancy increased by 6.6 years, whereas the rise in healthy life expectancy was only 5.5 years. To close the difference between the two numbers, exercise is crucial.

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“…Therefore, one of the most urgent issues in the power industry is collecting and storing the generated thermal energy using heat accumulators. Such devices can be used as thermal power reserves during night hours or system failures [7]. In addition, thermal energy can be converted into electrical energy for production in the thermomechanical cycle when there is a demand for it [8].…”

mentioning

confidence: 99%

Modular heat storage in waste heat recovery installations

2023

Archives of Thermodynamics

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The paper presents the methodology of designing a system for accumulating waste heat from industrial processes. The research aimed to analyse the fluid's movement in the heat accumulator to unify the temperature field in the volume of water constituting the heat buffer. Using the computer program Ansys Fluent, a series of computational fluid dynamics simulations of the process of charging the heat storage with water at 60 • C, 70 • C, and 80 • C was carried out. The selected temperatures correspond to the temperature range of unmanaged waste heat. In the presented solution, heat storage is loaded with water from the cooling systems of industrial equipment to store excess heat and use it at a later time. The results of numerical calculations were used to analyse the velocity and temperature fields in the selected structure of the modular heat storage. A novelty in the presented solution is the use of smaller modular heat storage units that allow any configuration of the heat storage system. This solution makes it possible to create heat storage with the required heat capacity.

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Numerical modelling of heat accumulator performance at storage of solar energy

Cited by 7 publications

References 16 publications

Applications of solar thermal radiation in a bio‐convective Eyring–Powell hybrid nanofluid flow under the influence of electro‐magnetohydrodynamics near a stagnation point: An irreversibility study

Applications of solar thermal radiation in a bio‐convective Eyring–Powell hybrid nanofluid flow under the influence of electro‐magnetohydrodynamics near a stagnation point: An irreversibility study

Technologies for heating sports facilities

Modular heat storage in waste heat recovery installations

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