Pore scale numerical simulation of heat transfer and flow in porous volumetric solar receivers

Zhu, Qibin; Xuan, Yimin

doi:10.1016/j.applthermaleng.2017.03.141

Cited by 65 publications

(13 citation statements)

References 37 publications

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“…In the structure of packed bed tanks, the disordered packing method is simple in structure and cost-effective, making it the most widely used filling method [123]. However, the pressure drop in a disordered packed bed is usually high [124], and the uneven distribution of TESM particles can lead to non-uniform fluid flow and heat transfer [125]. Optimizing the packing method and particle size of TESM particles can improve the performance Energies 2024, 17, 2403 23 of 41 of THS systems.…”

Section: Arrangement Of Solid Thermal Energy Storage Materialsmentioning

confidence: 99%

New Advances in Materials, Applications, and Design Optimization of Thermocline Heat Storage: Comprehensive Review

Zhang,

Guo,

Zhu

et al. 2024

Energies

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To achieve sustainable development goals and meet the demand for clean and efficient energy utilization, it is imperative to advance the penetration of renewable energy in various sectors. Energy storage systems can mitigate the intermittent issues of renewable energy and enhance the efficiency and economic viability of existing energy facilities. Among various energy storage technologies, thermocline heat storage (THS) has garnered widespread attention from researchers due to its stability and economic advantages. Currently, there are only a few review articles focusing on THS, and there is a gap in the literature regarding the optimization design of THS systems. Therefore, this paper provides a comprehensive review of the recent research progress in THS, elucidating its principles, thermal storage materials, applications, and optimization designs. The novelty of this work lies in the detailed classification and analysis of various optimization designs for THS, including tank shape, aspect ratio, inlet/outlet configuration, thermal energy storage materials arrangement, operating strategies, and numerical model optimization approaches. The limitations of existing research are also identified, and future perspectives are proposed, aiming to provide recommendations for THS research and contribute to the development and promotion of THS technology.

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Section: Arrangement Of Solid Thermal Energy Storage Materialsmentioning

confidence: 99%

New Advances in Materials, Applications, and Design Optimization of Thermocline Heat Storage: Comprehensive Review

Zhang,

Guo,

Zhu

et al. 2024

Energies

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“…To uphold meaningful physics, it is necessary to ensure the continuity of velocity, shear stress, fluid temperature, and heat flux at the porous-fluid interface. The corresponding expressions are denoted by Equations (20)(21)(22)(23)(24) [46].…”

Section: Governing and Turbulent Equationsmentioning

confidence: 99%

“…In an effort to improve the thermal performance of SAHs as a whole, 2 researchers have conducted exhaustive studies on a variety of techniques, all to develop more efficient collectors, such as  surface roughness [13][14][15], employing phase change material [16,17], coating absorber plates [18], and extended surfaces [19][20][21]. Among the several strategies for improving SAH performance, one extremely successful strategy for improving heat transmission involves including porous materials, particularly metal foams, into the channels [22]. When using porous material, the thermal performance factor is higher than solar air heaters with turbulators of various geometries [23].…”

Section: Introductionmentioning

confidence: 99%

Computational insights into the thermal performance enhancement of solar air heater channel through metal foam integration

Al-Chlaihawi,

Hasan,

Kaied

2024

ETJ

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 Fluid flow and heat transfer in an SAH channel with metal foam were simulated  The LTNE and DEF models were used.  The thermo-hydraulic performance of SAH was analyzed, considering several key factors.  Compared to the empty SAH duct, Nu rises 9-10.6 times and friction factor by 53.5-56.6 times.  TPF varies from 2.33 to 2.82 at H f =0.6 and ω=10 PPI.The two-dimensional numerical simulations focused on fluid flow and heat transfer within a solar air heater (SAH) channel incorporating copper metal foam with a porosity of 90% were carried out in this study. The Local Thermal Nonequilibrium (LTNE) and Darcy-Extended Forchheimer (DEF) models were employed to predict fluid and thermal transport in the partially porous SAH channel. In the free flow zone, the turbulence model was utilized. The thermal and thermo-hydraulic performances of SAH were examined concerning several factors, including pore density ( ), Reynolds number ( ), and dimensionless foam height ( ). The results demonstrate that inserting a porous substrate into the SAH can substantially increase heat transmission. This enhancement ranges from 4.4 to 18.04 times compared to an empty duct for at . Moreover, increased porous layer height and pore density lead to a corresponding increase in pressure drop. Evaluating both the improvement in heat transmission and the associated pressure penalty, the case with , and demonstrate superior overall performance, boasting a higher Thermal Performance Factor ( ) of 2.82 when compared to an empty channel. This work presents significant findings on optimizing metal foam applications in SAH systems, offering new insights into the field.

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“…The temperature in each of the nodes was measured using integrated thermocouples along the steam generator output line and the entire sample-holder in order to corroborate the improved thermal conductivity. The drop-in temperature in general is due primarily to the tortuosity of the medium [92,93], to the energy transfer from the steam to the fluids (water and oil) [94], and the composition of the rock (99% silica) can be considered as heat sinks [95]. On the other hand, the change in temperature for the system after the nanofluid injection was lower than in the absence thereof.…”

Section: Temperature Profile During Steam Injection Testsmentioning

confidence: 99%

Improvement of Steam Injection Processes Through Nanotechnology: An Approach through in Situ Upgrading and Foam Injection

et al. 2019

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This study aims to evaluate a high-performance nanocatalyst for upgrading of extra-heavy crude oil recovery and at the same time evaluate the capacity of foams generated with a nanofluid to improve the sweeping efficiency through a continuous steam injection process at reservoir conditions. CeO2±δ nanoparticles functionalized with mass fractions of 0.89% and 1.1% of NiO and PdO, respectively, were employed to assist the technology and achieve the oil upgrading. In addition, silica nanoparticles grafted with a mass fraction of 12% polyethylene glycol were used as an additive to improve the stability of an alpha-olefin sulphonate-based foam. The nanofluid formulation for the in situ upgrading process was carried out through thermogravimetric analysis and measurements of zeta potential during eight days to find the best concentration of nanoparticles and surfactant, respectively. The displacement test was carried out in different stages, including, (i) basic characterization, (ii) steam injection in the absence of nanofluids, (iii) steam injection after soaking with nanofluid for in situ upgrading, (iv) N2 injection, and (v) steam injection after foaming nanofluid. Increase in the oil recovery of 8.8%, 3%, and 5.5% are obtained for the technology assisted by the nanocatalyst-based nanofluid, after the nitrogen injection, and subsequent to the thermal foam injection, respectively. Analytical methods showed that the oil viscosity was reduced 79%, 77%, and 31%, in each case. Regarding the asphaltene content, with the presence of the nanocatalyst, it decreased from 28.7% up to 12.9%. Also, the American Petroleum Institute (API) gravity values increased by up to 47%. It was observed that the crude oil produced after the foam injection was of higher quality than the crude oil without treatment, indicating that the thermal foam leads to a better swept of the porous medium containing upgraded oil.

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Pore scale numerical simulation of heat transfer and flow in porous volumetric solar receivers

Cited by 65 publications

References 37 publications

New Advances in Materials, Applications, and Design Optimization of Thermocline Heat Storage: Comprehensive Review

New Advances in Materials, Applications, and Design Optimization of Thermocline Heat Storage: Comprehensive Review

Computational insights into the thermal performance enhancement of solar air heater channel through metal foam integration

Improvement of Steam Injection Processes Through Nanotechnology: An Approach through in Situ Upgrading and Foam Injection

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