Optimizing the design of composite phase change materials for high thermal power density

Barako, Michael T.; Lingamneni, Srilakshmi; Katz, Joseph S.; Liu, Tanya; Goodson, Kenneth E.; Tice, Jesse

doi:10.1063/1.5031914

Cited by 36 publications

(10 citation statements)

References 41 publications

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“…Besides TE devices, IOs structures also exhibit promising applications for phase change materials used for thermal storage. For instance, by infiltrating Cu inverse opals with paraffin wax, the temperature rise in kW cm −2 hotspots is suppressed by ≈10% compared with the copper thin film heat spreaders . In the thermofluidic system, metal inverse opals can be used as microfluidic heat exchanger with a high thermal conductivity.…”

Section: D Nanostructures For Low Thermal Conductivitymentioning

confidence: 99%

“…For instance, by infiltrating Cu inverse opals with paraffin wax, the temperature rise in kWcm -2 hotspots is suppressed by ~ 10% compared with the copper thin film heat spreaders. [91] In the thermofluidic system, metal inverse opals can be used as microfluidic heat exchanger with a high thermal conductivity. In general, inverse opals represent an important category of porous morphologies for enhanced interfacial transport in applications like electrochemical surfaces and microscale heat exchangers or suppressed heat transfer for TE devices, while their thermal conduction principles (e.g., the heat transfer across the interface) are still requiring extensive studies.…”

Section: Inverse Opals Structuresmentioning

confidence: 99%

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Thermal Transport in 3D Nanostructures

Zhan

Nie

Chen

et al. 2019

Adv Funct Materials

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This work summarizes the recent progress on the thermal transport properties of 3D nanostructures, with an emphasis on experimental results. Depending on the applications, different 3D nanostructures can be prepared or designed to either achieve a low thermal conductivity for thermal insulation or thermoelectric devices or a high thermal conductivity for thermal interface materials used in the continuing miniaturization of electronics. A broad range of 3D nanostructures are discussed, ranging from colloidal crystals/assemblies, array structures, holey structures, hierarchical structures, to 3D nanostructured fillers for metal matrix composites and polymer composites. Different factors that impact the thermal conductivity of these 3D structures are compared and analyzed. This work provides an overall understanding of the thermal transport properties of various 3D nanostructures, which will shed light on the thermal management at nanoscale.

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Section: D Nanostructures For Low Thermal Conductivitymentioning

confidence: 99%

Section: Inverse Opals Structuresmentioning

confidence: 99%

Thermal Transport in 3D Nanostructures

Zhan

Nie

Chen

et al. 2019

Adv Funct Materials

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“…The highly scalable method presents a significant opportunity for a plethora of other nonboiling applications such as condensation, − freezing, − as well as phase change energy storage. , Recent studies have revealed that condensation in copper foams as well as thin-film condensation in highly porous cavities present ways to achieve great durability while enhancing performance compared to state of the art approaches. For the successful utilization of phase change materials (PCMs) in energy storage applications, power density is a significant limitation often requiring the use of expensive or onerous porous metal foams , or inverse opals − to increase the effective thermal conductivity of the PCM composite. Our structuring approach stands to help enable the penetration of PCM energy storage via the simplification of the most expensive and time-consuming steps involved with manufacturing the highly conductive metallic backbone.…”

Section: Resultsmentioning

confidence: 99%

Ultrascalable Three-Tier Hierarchical Nanoengineered Surfaces for Optimized Boiling

Zhang

et al. 2019

ACS Nano

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Nanostructure-enhanced pool and flow boiling has the potential to increase the efficiency of a plethora of applications. Past studies have developed well-ordered, nonscalable structures to study the fundamental limitations of boiling such as bubble nucleation, growth, and departure, often in a serial manner without global optimization. Here, we develop a highly scalable, conformal, cost-effective, rapid, and tunable three-tier hierarchical surface deposition technique capable of holistically creating micropores, microscale dendritic clusters, and nanoparticles on arbitrary surfaces. We use this technique to investigate the pool boiling heat transfer performance with focus on the bubble departure diameter and frequency. By tuning the structure length scale, the pool boiling characteristics were optimized through a multipronged approach, including increasing nucleation site density (micropores), regulating bubble evolution behavior (dendritic structures), improving surface wickability (nanoscale particles and channels), and separating liquid and vapor pathways (micropores and micro/nanochannels). Ultrahigh critical heat fluxes (CHF) ≈400 W/cm2 were obtained, corresponding to an enhancement of ≈245% compared to smooth copper surfaces. To study in situ bubble departure and coalescence dynamics, we developed and used high-magnification in-liquid endoscopy. Our work reveals the existence of a linear relationship between the bubble departure diameter/frequency near the onset of nucleate boiling and CHF enhancement. Our study not only develops a highly scalable, conformal, and rapid micro/nanostructuring technique, it outlines design guidelines for the holistic optimization of boiling heat transfer for energy and water applications.

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“…A number of studies have utilized this general design framework to study the effect of different parameters, such as fin configurations and geometries, although few concrete design rules have emerged thus far. [ 11,13–16 ]…”

Section: Introductionmentioning

confidence: 99%

Design and Optimization of Lamellar Phase Change Composites for Thermal Energy Storage

et al. 2020

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Phase change materials offer thermal energy storage (TES) and are often integrated with high conductivity materials to increase power density. However, the design and optimization of such composites are historically based on intuition, as the computational techniques used to predict behavior in these systems are generally too expensive to perform parametric studies. Herein, a general design framework is developed and demonstrated that is optimized for TES in parallel lamellar structures, to identify the critical pitch required to treat the composite as a single effective medium and the optimum volume fraction of high conductivity material in the lamellar composite. The optimization criteria is tested experimentally using 3D printed AlSi12 alloy and octadecane. The composite system exhibits a critical pitch between a lamella of 1 mm and the optimum volume fraction for the high conductivity material is 0.6–0.8. The design principles demonstrated here show that the size and volumes of conductive materials are much larger than the current state of the art, and this framework provides a holistic approach to design for such future materials for TES applications.

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Optimizing the design of composite phase change materials for high thermal power density

Cited by 36 publications

References 41 publications

Thermal Transport in 3D Nanostructures

Thermal Transport in 3D Nanostructures

Ultrascalable Three-Tier Hierarchical Nanoengineered Surfaces for Optimized Boiling

Design and Optimization of Lamellar Phase Change Composites for Thermal Energy Storage

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