Solid-liquid phase change investigation through a double pipe heat exchanger dealing with time-dependent boundary conditions

Taghilou, Mohammad; Sefidan, Ali M.; Sojoudi, Atta; Saha, Suvash C.

doi:10.1016/j.applthermaleng.2017.09.069

Cited by 15 publications

(6 citation statements)

References 25 publications

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“…The numerical model is created under the following assumptions: (1) the water flow and liquid PCM flow are assumed to be laminar and incompressible, (2) the metal foam is considered homogeneous and isotropic, (3) the volume expansion of the PCM during phase change is neglected [2,17,18,21], (4) the Boussinesq approximation is used to account for the natural convection inside the PCM, and (5) the thermo-physical properties are constant. Based on the above assumptions, the governing equations can be expressed as: For the forced flow and heat transfer in the water flow side [2,24]: The numerical model is created under the following assumptions: (1) the water flow and liquid PCM flow are assumed to be laminar and incompressible, (2) the metal foam is considered homogeneous and isotropic, (3) the volume expansion of the PCM during phase change is neglected [2,17,18,21], (4) the Boussinesq approximation is used to account for the natural convection inside the PCM, and (5) the thermo-physical properties are constant. Based on the above assumptions, the governing equations can be expressed as:…”

Section: MMmentioning

confidence: 99%

“…Enthalpy-porosity method is adopted, and the liquid-solid mushy zone is treated as a pseudo porous zone. The variable γ is determined by the following formulas [17,18,21]:…”

Section: MMmentioning

confidence: 99%

“…Mahdi and Nsofor [15,16] investigated the heat transfer characteristics inside a triplex-tube PCM TES system during the melting and solidification, with a compound porous-foam/nanoparticles enhancement technique. Phase change within a double pipe heat exchanger is modelled by Taghilou et al [17] under time-dependent boundary conditions. Pourakabar and Rabienataj Darzi [18] discussed the effects of shell shape, arrangement of inner tubes and metal foam insert on the performance of a TES system.…”

Section: Introductionmentioning

confidence: 99%

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Thermal Performance of a PCM-Based Thermal Energy Storage with Metal Foam Enhancement

Chen

Xia

et al. 2019

Energies

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The energy transport inside a phase change material (PCM) based thermal energy storage system using metal foam as an enhancement technique is investigated numerically. The paraffin is used as the PCM and water as the heat transfer fluid (HTF). The transient heat transfer during the charging and discharging processes is solved, based on the volume averaged conservation equations. The flow in PCM/foam and HTF/foam composites is modelled by the Forchheimer-extended Darcy equation, while the two-temperature model is employed to account for the local thermal non-equilibrium effect between the foam matrix and fluid phase. The results show that the overall performance is greatly improved by inserting metal foam in both HTF and PCM sides. A nearly 84.9% decrease in the time needed for the total process is found compared with the case of pure PCM, and 40% compared with the case of metal foam insert only in the PCM side. Foam porosity and HTF inlet temperature greatly affect the dynamic heat storage/release process.

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Section: MMmentioning

confidence: 99%

“…Enthalpy-porosity method is adopted, and the liquid-solid mushy zone is treated as a pseudo porous zone. The variable γ is determined by the following formulas [17,18,21]:…”

Section: MMmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Thermal Performance of a PCM-Based Thermal Energy Storage with Metal Foam Enhancement

Chen

Xia

et al. 2019

Energies

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show abstract

Section: Introductionmentioning

confidence: 99%

“…Also, the melting temperature of the PCM alters the heat storage unit's performance. Taghilou et al 38 explored the phase change process in a double tube multiple PCMs heat exchanger, which had two separate sections and contained two PCMs with different melting points. The literature, as described above, indicates that, our understanding, in particular, of the second arrangement mode for multiple PCMs is still insufficient.…”

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confidence: 99%

Experimental and numerical investigation of the melting process and heat transfer characteristics of multiple phase change materials

Wang

et al. 2020

Int J Energy Res

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The melting and heat transfer characteristics of multiple phase change materials (PCMs) are investigated both experimentally and numerically. Multiple PCMs, which consist of three PCMs with different melting points, are filled into a rectangle-shaped cavity to serve as heat storage unit. One side of the cavity is set as heating wall. The melting rate of multiple PCMs was recorded experimentally and compared with that of single PCM for different heating temperatures. A two-dimensional mathematical model to describe the phase change heat transfer was developed and verified experimentally. The properties of multiple PCMs, including the effect of the melting point difference (combined type), thermal conductivity, and latent heat, on the heat transfer performance of the PCM were analyzed numerically. The results show that, the melting time decreases before it increases, with an increasing melting point difference for the multiple PCMs. In addition, the melting point decreases with increasing distance from the heating wall. Most of these types of multiple PCMs melt faster than the single PCM, and the multiple PCMs, with the melting point arranged as 322 K/313 K/304 K, has the shortest melting time in this study. The melting rate of the multiple PCMs, 322 K/313 K/304 K, accelerates faster than for the single PCM as the thermal conductivity, latent heat, and heating wall temperature increase. Finally, generalized results are obtained using a dimensionless analysis for both single and multiple PCMs.

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Enhanced Phase Change Heat Storage of Layered Backfill Body under Different Boundary Conditions

Zhang

Zhao

et al. 2023

J. Therm. Sci.

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Solid-liquid phase change investigation through a double pipe heat exchanger dealing with time-dependent boundary conditions

Cited by 15 publications

References 25 publications

Thermal Performance of a PCM-Based Thermal Energy Storage with Metal Foam Enhancement

Thermal Performance of a PCM-Based Thermal Energy Storage with Metal Foam Enhancement

Experimental and numerical investigation of the melting process and heat transfer characteristics of multiple phase change materials

Enhanced Phase Change Heat Storage of Layered Backfill Body under Different Boundary Conditions

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