QIAN Chunzhi, CHEN Yu, ZHAO Xijia, et al. Enhancement mechanism of three-dimensional-printed metal fins for the melting and heat-storage performance of phase-change materials[J]. Energy Storage Science and Technology, 2026, 15(4): 1185-1195.
QIAN Chunzhi, CHEN Yu, ZHAO Xijia, et al. Enhancement mechanism of three-dimensional-printed metal fins for the melting and heat-storage performance of phase-change materials[J]. Energy Storage Science and Technology, 2026, 15(4): 1185-1195.DOI: 10.19799/j.cnki.2095-4239.2025.0927.
Enhancement mechanism of three-dimensional-printed metal fins for the melting and heat-storage performance of phase-change materials
To systematically investigate the impact of metal fins on the melting kinetics and heat-storage behavior of phase-change materials (PCMs)
aluminum-alloy fins were integrated with a heated baseplate via selective laser melting (SLM) three-dimensional (3D) printing. Thereafter
these additively ma
nufactured structures were embedded in n-octadecane to construct composite PCM units. Melting experiments were conducted via constant-temperature bottom heating to track the melting-front evolution. Concurrently
a numerical model of the metal fin/n-octadecane melting and heat-storage processes was developed using COMSOL Multiphysics
and its accuracy was validated via a comparative analysis with experimental results. Leveraging the validated model
the effects of the metal-fin height
gradient
number
distribution pattern
and material on the overall melting kinetics were analyzed through simulations.Resultsreveal that the 3D-printed metal fins significantly enhanced the heat-storage rate by expanding the effective heat-transfer area
directing heat flow
and altering the morphological evolution of the melting front. The heat-storage rate increased with the increasing fin height before reaching a saturation point
with the optimal height identified as 25 mm. Fin gradient exerted a negligible effect on the melting rate. Distributed fins further enhanced heat transfer
with the melting rate increasing at first before decreasing as the number of fins increased
reaching an optimum at five fins. Further optimization of the uniform 5
a
baseline into a non-uniform 0.5
a
+4
a
+0.5
a
configuration improved the heat-storage rate by an additional 8%
representing a 260% thermal enhancement over pure PCM
making it the most effective fin distribution in this study. Among conventionally employed SLM-compatible 3D-printed metallic materials
pure copper exerted the most significant enhancement effect on the melting rate owing to its high thermal conductivity
imparting a 40.57% enhancement compared with the aluminum-alloy variant.
ZHU J. Analysis of thermal storage performance of electric vehicle thermal phase change energy storage system under the background of new energy and low carbon[J]. Energy Storage Science and Technology, 2024, 13(12): 4406-4408.
LIU W J, DU R X, WANG S Q, et al. Research status and application of functional phase change materials for electro-thermal conversion in thermal energy storage[J]. CIESC Journal, 2025, 76(7): 3185-3196. DOI:10.11949/0438-1157.20241469.
SHEN T F, SUN Z G. Preparation and properties of caprylic acid-hexadecanol/expanded graphite composite phase change materials[J]. Journal of Functional Materials, 2025, 56(6): 6186-6194. DOI:10.3969/j.issn.1001-9731.2025.06.023.
XI B H, HU H, ZHANG H H, et al. Research progress of phase change thermal storage materials in the field of photothermal conversion[J]. The Chinese Journal of Process Engineering, 2025, 25(8): 792-803. DOI:10.12034/j.issn.1009-606X.224344.
ZHANG X W, ZHAI X Y, DONG B B, et al. Preparation and characterization of modified SiO 2 /n-octadecane phase change nanocapusules and their applicatio n in solar building[J ] . Acta Energiae Solaris Sinica, 2023, 44(4): 290-298. DOI:10.19912/j.0254-0096.tynxb.2021-1561.
YAN S D, ZHU Z H, LIU M X, et al. Effect of blood containers containing phase-changed material on quality of stored RBCs on the sea[J]. Military Medical Sciences, 2017, 41(9): 707-710. DOI:10.7644/j.issn.1674-9960.2017.09.001.
ONG P J, SHUKO LEE H Y, WANG S X, et al. Recent advances in enhanced thermal property in phase change materials using carbon nanotubes: A review[J]. Solar Energy Materials and Solar Cells, 2025, 279: 113228. DOI:10.1016/j.solmat.2024.113228.
KANT K, SHUKLA A, SHARMA A, et al. Heat transfer study of phase change materials with graphene nano particle for thermal energy storage[J]. Solar Energy, 2017, 146: 453-463. DOI:10.1016/j.solener.2017.03.013.
ARAMESH M, SHABANI B. Metal foam-phase change material composites for thermal energy storage: A review of performance parameters[J]. Renewable and Sustainable Energy Reviews, 2022, 155: 111919. DOI:10.1016/j.rser.2021.111919.
LI R F, ZHOU Y, DUAN X L. A novel composite phase change material with paraffin wax in tailings porous ceramics[J]. Applied Thermal Engineering, 2019, 151: 115-123. DOI:10.1016/j.applthermaleng.2019.01.104.
CHAI W J, ZHAO X J, CAO S H. Experimental and numerical studies on the melting heat storage of metal honeycomb-enhanced phase-change materials[J]. Energy Storage Science and Technology, 2024, 13(12): 4357-4367.
TAHMASBI M, SIAVASHI M, KARIMI A R, et al. The effects of fins number, metal foam, and helical coil on the thermal storage enhancement of the phase change material: An experimental study[J]. Applied Thermal Engineering, 2024, 253: 123780. DOI:10.1016/j.applthermaleng.2024.123780.
YUAN W, HAN R Y, DU S Q, et al. Impact of spiral fins and circular fins on heat transfer performance in phase change energy storage tanks[J]. Journal of Chinese Society of Power Engineering, 2025, 45(9): 1463-1473.
CAO S H, ZHAO X J, WANG F Q, et al. Experimental investigation on the thermophysical properties and solidification characteristics of n-octadecane in a spherical capsule[J]. Case Studies in Thermal Engineering, 2024, 64: 105475. DOI:10.1016/j.csite.2024.105475.
XU Y T, LI Y Z, WANG L J, et al. Molten pool macroscopic thermodynamic analysis during selective laser melting of AlSi 10 Mg: Simulations and experiments[J ] . Journal of Materials Research and Technology, 2024, 33: 2506-2518. DOI:10.1016/j.jmrt.2024.09.216.
SHEN Z H, HUA J F, HE Y Q, et al. Experimental study of melting on graded metal foam composite phase change materials under nonuniform heat flux[J]. International Journal of Heat and Mass Transfer, 2025, 239: 126613. DOI:10.1016/j.ijheatmasstransfer. 2024.126613.
KANT K, BIWOLE P H, SHUKLA A, et al. Heat transfer and energy storage performances of phase change materials encapsulated in honeycomb cells[J]. Journal of Energy Storage, 2021, 38: 102507. DOI:10.1016/j.est.2021.102507.