Forward Selection Methodology for Phase Change Material Composite Optimization

Hoe, Alison; Easley, Alexandra D.; Deckard, Michael; Felts, Jonathan R.; Shamberger, Patrick J.

doi:10.1109/itherm45881.2020.9190188

Cited by 3 publications

(2 citation statements)

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“…PCMs, when integrated into building structures, offer passive cooling potential by harnessing latent heat. Conventional cooling techniques are known for high energy consumption and environmental impact [5,6]. Recently, there has been a growing focus on elevating the effectiveness of PCM due to their potential in improving energy efficiency, sustainability, and address environmental issues [7,8].…”

Section: Introductionmentioning

confidence: 99%

“…Despite these advancements, further research is needed to optimize the distribution of PCMs in walls for maximum thermal performance [12]. Although optimizing the heat transfer efficiency of PCM modules has received substantial interest in the energy-saving sector [10,13], and the research has investigated methods of enhancing the performance of PCM such as appropriate implementation [14], material hosting [15], PCM material like composite PCM [16,5], and machine learning [17], research still lacks investigating the distribution of PCM and its effect on the performance. Thus, in this study, enhancing PCM is investigated based on geometry and distribution.…”

Section: Introductionmentioning

confidence: 99%

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Refining the Integration of Encapsulated Phase Change Materials in Building Envelopes

Aridi,

Yehya

2024

Preprint

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The demand for cooling of buildings is continuously growing due to global warming contributing to more global CO2 emissions. Escalating resource costs and climate change risks intensify the need for efficient cooling solutions. Phase change materials have been used in building envelopes to reduce the energy consumption. However, these materials are often costly, which creates a barrier for their implementation. Reducing the PCM quantities without compromising their behavior provides a substantial reduction to their overall payback period and increases their feasibility. This study aims to optimize the incorporation of encapsulated PCM in building envelopes by studying the effect of their distribution pattern within the walls. The simulations are done using 2D finite element method. The results indicate that PCM distribution has an important effect on the efficiency of the design and an optimal distribution can allow the reduction of PCM quantities in a wall. In the studied case, the lowest cooling load was found at 14% volumetric percentage of PCM rather than 30% if optimal distribution is used. This consequently have important implications on the need for geometrical optimization when it comes to encapsulated PCM systems.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Refining the Integration of Encapsulated Phase Change Materials in Building Envelopes

Aridi,

Yehya

2024

Preprint

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Design of Radially Variant Phase‐Change Material Composites

et al. 2022

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Phase‐change materials (PCMs) and high‐conductivity elements can be combined to form highly compact and efficient composite heat sinks. However, the design challenge presented by thermal composites composed of PCMs and high‐conductivity elements remains unresolved. Herein, design guidelines are presented for radially varying cylindrical PCM composites. Numerical and analytical techniques are utilized to explore the utility and limits of optimal composite designs selecting for 1) temperature minimization, 2) specific effective heat capacity maximization, and 3) volumetric effective heat capacity maximization. Significant increases in each metric are observed when implementing radially variant designs in cylindrical geometries, especially for metrics of heat capacity. Furthermore, a hybrid approach to variant composite design is presented, allowing for the balancing of different design objectives. The utilization of a variable design under high heat flux (10 ± 1.4 W cm−2) and short melting periods (up to 50 s) is experimentally demonstrated, directly resulted in a 65% decrease in total system mass and a 200% increase in specific heat capacity while maintaining strong temperature dampening performance. In a second case study, a 23% decrease in mass is demonstrated while maintaining strong specific heat performance, emphasizing the broad utility of this approach.

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