Experimental and modeling approach to heat and mass transfer in a porous bed of a rock-bed heat accumulator

Kurpaska, S.; Latała, H.; Kiełbasa, Paweł; Sporysz, M.; Gliniak, Maciej; Famielec, Stanisław; Bogusława, Łapczyńska-Kordon

doi:10.1016/j.ijheatmasstransfer.2021.121654

Cited by 3 publications

(1 citation statement)

References 46 publications

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“…The presented results discuss the macroscopic changes in the real system in which the stone accumulator is used. The theoretical details have been extensively discussed in the author's previous work [55] where it was shown that the average value of the stored heat in the charging cycle of the stone heat accumulator (calculated as the difference between the enthalpy of the inlet and outlet air) amounted to approx. 9.4 MJ•m −2 of the accumulator surface.…”

Section: Thermo-mass Analysismentioning

confidence: 99%

Thermal-Mass and Microbiological Analysis of Forced Air Flow through the Stone Heat Accumulator Bed

Kurpaska,

Wolny-Koładka,

Malinowski

et al. 2023

Energies

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Heat storage in systems integrated with renewable energy sources in facilities can reduce the consumption of fossil fuels, cut maintenance costs, and decrease greenhouse gas emissions from buildings and other objects. One of the possible solutions is the use of a stone heat accumulator for short-term heat storage and the use of this deposit in the ventilation process of the facility. During short-term air flow through the porous material from which an accumulator bed is made, there is an exchange of heat and mass between the flowing air and the bed particles. In the long term, the use of an accumulator can lead to an increase in dust and the development of pathogenic microorganisms, endangering human life and health. Therefore, understanding the factors influencing the efficient use of a stone deposit is very important. The aim of this study is to calculate the changes in thermal-mass parameters in the air flowing out of the stone accumulator and to assess the effect of long-term stone accumulator use on the content of microorganisms and dust concentration in bioaerosol. The application of the heat storage system in the stone bed leads to the formation of strictly controlled microclimatic conditions, and the tested air does not constitute a threat to the people staying in the object. The concentration standards of PM10 and PM2.5 exceeded the limit values (PM2.5 = 20 μg∙m−3 and PM10 = 40 μg∙m−3), and, thus, the air in the studied greenhouse was classified as polluted. The analysis also showed that, for the analyzed conditions, a 20% increase in the initial temperature of the accumulator bed results in a nearly 20% increase in the outlet air temperature.

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Section: Thermo-mass Analysismentioning

confidence: 99%

Thermal-Mass and Microbiological Analysis of Forced Air Flow through the Stone Heat Accumulator Bed

Kurpaska,

Wolny-Koładka,

Malinowski

et al. 2023

Energies

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Non-equilibrium heat exchange and multi-coupled nature of mass transfer in solvent removal of propellant grains

Zhao

Rui

Rong

2022

International Journal of Heat and Mass Transfer

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Parameter Identification of the Fractional-Order Mathematical Model for Convective Mass Transfer in a Porous Medium

Pavlenko,

Ochowiak,

Włodarczak

et al. 2023

Membranes

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Fractional calculus is an essential tool in studying new phenomena in hydromechanics and heat and mass transfer, particularly anomalous hydromechanical advection–dispersion considering the fractal nature of the porous medium. They are valuable in solving the urgent problem of convective mass transfer in a porous medium (e.g., membranes, filters, nozzles, convective coolers, vibrational prillers, and so on). Its solution allows for improving chemical engineering and technology workflows, refining process models for obtaining porous granular materials, realizing the convective cooling of granular and grain materials, and ensuring the corresponding apparatuses’ environmental safety. The article aims to develop a reliable convective mass transfer model for a porous medium and proposes a practical approach for its parameter identification. As a result, a general scientific and methodological approach to parameter identification of the fractional convective mass transfer model in a porous medium was proposed based on available experimental data. It mainly used Riemann–Liouville fractional time and coordinate derivatives. The comprehensive application of the Laplace obtained the corresponding general solution transform with respect to time and a coordinate, the Mittag-Leffler function, and specialized functions. Different partial solutions in various application case studies proved this solution. Moreover, the algorithm for practically implementing the developed approach was proposed to evaluate parameters for the considered model by evaluation data. It was reduced to the two-parameter model and justified by the available experimental data.

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Experimental and modeling approach to heat and mass transfer in a porous bed of a rock-bed heat accumulator

Cited by 3 publications

References 46 publications

Thermal-Mass and Microbiological Analysis of Forced Air Flow through the Stone Heat Accumulator Bed

Thermal-Mass and Microbiological Analysis of Forced Air Flow through the Stone Heat Accumulator Bed

Non-equilibrium heat exchange and multi-coupled nature of mass transfer in solvent removal of propellant grains

Parameter Identification of the Fractional-Order Mathematical Model for Convective Mass Transfer in a Porous Medium

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