Response of Phase-Change-Material-Filled Porous Foams Under Transient Heating Conditions

Jackson, Galen R.; Fisher, Timothy S.

doi:10.2514/1.t4866

Cited by 8 publications

(2 citation statements)

References 26 publications

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“…A distributed thermal mass model has been demonstrated previously (Jackson and Fisher, 2016) with a numerical timedependent analysis for a single-phase material. This approach assesses the previously discussed lumped mass model's ability to capture the dynamics of the thermal process.…”

Section: Distributed Thermal Mass Modelmentioning

confidence: 99%

Ragone Relations for Thermal Energy Storage Technologies

2019

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The Ragone relation is a facile approach to assess and compare electro-chemical battery performance in terms of two critical performance parameters: power density and energy density. This power and energy nexus is equally relevant for thermal energy storage materials for thermal management applications that require a balance between energy storage capacity and on-demand cooling or heating rates. Here, thermal energy storage is evaluated for sensible heating and for phase-change materials (PCMs). We propose an analytic expression using a lumped mass model for thermal storage through an analogy with heat diffusion that allows for intuitive mapping of materials and components in power-energy space. In addition, a previously proposed figure-of-merit, η q , describing the intrinsic capability of PCMs to rapidly absorb or discharge heat is placed in the context of the thermal Ragone (power-energy) relation. This figure of merit serves as a proxy for the cooling power of PCMs and single-phase materials to store thermal energy. Thus, η q plotted against energy density can serve graphically to illustrate performance tradeoffs between different thermal storage materials, as well as composites composed of different materials.

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Section: Distributed Thermal Mass Modelmentioning

confidence: 99%

Ragone Relations for Thermal Energy Storage Technologies

2019

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“…Numerical studies based on conventional continuum approaches are also helpful in analyzing the pattern of highly conductive PCM materials for achieving good thermal responses. Jackson and Fisher studied transient responses of PCM‐filled porous foams for cyclic thermal loads. Developments in the field of PCM‐based cooling methods are helpful in realizing self‐contained electronics cooling systems.…”

Section: Literature Reviewmentioning

confidence: 99%

Heat transfer modeling and simulations for electronic cooling systems embedded with phase changing materials

Indulakshmi

Madhu

2017

Heat Trans. Asian Res.

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Electronic systems used in communication devices and mission critical systems such as directed-energy weapons and spacecraft call for requirements to dissipate high heat flux in limited spaces. This study attempts to model the heat transfer in an electronic module, dissipating heat to a coolant in a microchannel as well as to ambient by natural convection and radiation. These results have been used to compare the effectiveness of a new cooling system, embedded with phase changing materials within the heat spreaders. The heat transfer model takes care of the heat stored in the phase changing material, heat transferred by natural convection and radiation effects, in addition to the convection heat transfer in the microchannel cooling passage. Hence, the developed model can successfully take into account the effect of the variation in operating atmospheric conditions which are significant in systems employed in harsh thermal environments. Simulations have been performed for a wide range of heats and appropriate coolant flow rates are being set for a prescribed safe operating temperature of the processor. Simulations for cooling systems with phase changing materials embedded

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