Performance of phase change materials for heat storage thermoelectric harvesting

Kiziroglou, Michail E.; Elefsiniotis, A.; Wright, S. W.; Toh, Tzern T.; Mitcheson, Paul D.; Becker, Thomas; Yeatman, Eric M.

doi:10.1063/1.4829044

Cited by 19 publications

(7 citation statements)

References 9 publications

(14 reference statements)

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“…50 % [ 164 ]. The effect of using various PCMs on the performance of TEGs was, in turn, investigated, by using water as reference, via tests on groups of organic and inorganic materials [ 165 , 166 , 167 , 168 ]. The first flight results with such thermoelectric harvester, used to realize aircraft-specific wireless sensor nodes, indicated reliable operation, while experimental results, compared to predictions from theoretical models, demonstrated that the developed simulation models can be used to consistently predict the power output of this class of EH devices [ 169 ].…”

Section: Thermoelectric Energy Harvesting Systemsmentioning

confidence: 99%

Energy Harvesting Technologies for Structural Health Monitoring of Airplane Components—A Review

Zelenika

Hadaš

Bader

et al. 2020

Sensors

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With the aim of increasing the efficiency of maintenance and fuel usage in airplanes, structural health monitoring (SHM) of critical composite structures is increasingly expected and required. The optimized usage of this concept is subject of intensive work in the framework of the EU COST Action CA18203 “Optimising Design for Inspection” (ODIN). In this context, a thorough review of a broad range of energy harvesting (EH) technologies to be potentially used as power sources for the acoustic emission and guided wave propagation sensors of the considered SHM systems, as well as for the respective data elaboration and wireless communication modules, is provided in this work. EH devices based on the usage of kinetic energy, thermal gradients, solar radiation, airflow, and other viable energy sources, proposed so far in the literature, are thus described with a critical review of the respective specific power levels, of their potential placement on airplanes, as well as the consequently necessary power management architectures. The guidelines provided for the selection of the most appropriate EH and power management technologies create the preconditions to develop a new class of autonomous sensor nodes for the in-process, non-destructive SHM of airplane components.

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Section: Thermoelectric Energy Harvesting Systemsmentioning

confidence: 99%

Energy Harvesting Technologies for Structural Health Monitoring of Airplane Components—A Review

Zelenika

Hadaš

Bader

et al. 2020

Sensors

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“…Off-the-shelf or customized sealed PCM containers can then be fitted into the printed-to-fit HSU. These containers can be made of metal, providing an internal heat bridge, or of plastic, offering a considerably lighter implementation at the cost of ∆Τ loss due to temperature inhomogeneity [10]. Finally, one or more commercial TEGs are assembled and fixed either by pressfitting or clamping.…”

Section: Fabricationmentioning

confidence: 99%

“…During phase-change, TIN remains constant further increasing ∆Τ. The dynamics of this device concept have been studied experimentally, analytically and numerically [9], and phase change homogeneity [10], super cooling [11], and TEG design [12] have been considered as methods of performance improvement. Suitable power management systems have been developed, including bipolar operation, maximumpower-point-tracking and battery management capabilities [13].…”

Section: Introductionmentioning

confidence: 99%

Three-Dimensional Printed Insulation For Dynamic Thermoelectric Harvesters With Encapsulated Phase Change Materials

et al. 2017

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Energy harvesting devices have demonstrated their ability to provide power autonomy to wireless sensor networks. However, the adoption of such powering solutions by the industry is challenging due to their reliance on very specific environmental conditions such as vibration at a specific frequency, direct sunlight, or a local temperature difference. Dynamic thermoelectric harvesting has been shown to expand the applicability of thermoelectric generators by creating a local spatial temperature gradient from a temporal temperature fluctuation. Here, a simple method for prototyping or short-run production of such devices is introduced. It is based on the design and 3-D printing of an insulating container, insertion of a phase change material in encapsulated form, and use of commercial thermoelectric generators. The simplicity of this dry assembly method is demonstrated. Two prototype devices with double-wall insulation structures are fabricated, using a stainless-steel and a plastic phase change material encapsulation and a commercial TEG. Performance tests under a temperature cycle between ±25 °C show energy output of 43.6 and 32.1 J from total device masses of 69 and 50 g, respectively. Tests under multiple temperature cycles demonstrate the reliability and performance repeatability of such devices. The proposed method addresses the complication of requiring a wet stage during the final assembly of dynamic thermoelectric harvesters. It allows design and customization to particular size, energy, and insulation geometry requirements. This is important because it makes dynamic harvesting prototyping widely available and easy to reproduce, test, and integrate into systems with various energy requirements and size restrictions

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“…In contrast, for protection from environmental heat, a thermal design that maximizes t p must be sought, taking into account internal PCM temperature gradients and phase-change inhomogeneity. In this direction, the proposed model could be applied in combination with the analysis presented in [14] for the design of optimal fin structures, including multi-cavity PCM container geometries [6,15]. In the experimental results, the thermal conductivity ratio for the polystyrene insulation and the paraffin PCM used is around one order of magnitude.…”

Section: Sumulation Of Encapsulation Performancementioning

confidence: 99%

“…The phase change propagation in the container depends on the PCM properties as well as on the geometry and can be modeled by solution of the Stefan problem. It can affect the protection performance by introducing additional thermal resistance between the device and the environment [14]. In typical PCM thermal management applications, internal heat spreading structures such as fins are employed to suppress this effect, because the objective there is the maximization of heat sinking.…”

Section: Sumulation Of Encapsulation Performancementioning

confidence: 99%

Protection of Electronics from Environmental Temperature Spikes by Phase Change Materials

Kiziroglou

Yeatman

2015

Journal of Elec Materi

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Protection of electronics from high temperature environments is desirable in applications such as harsh environment industrial sensor networks for continuous monitoring and probing. In this paper, the use of phase-change-material (PCM) encapsulation of electronics is proposed as protection from environment-induced, probing-induced or electronic power burst -induced temperature spikes. An outline of the encapsulation method is given and a heat flow analysis is performed. A lumped element model is introduced and a numerical simulator is implemented. An encapsulation setup is fabricated and tested, allowing an experimental validation of the proposed method and model. The numerical simulation model is then used to study particular temperature spike scenarios. The results demonstrate that at reasonable encapsulation sizes and for commercially available phase-change and insulation materials, short-term protection from large temperature spikes can be provided by the proposed method. As an indicative example, for a typical sensor node normally operating at a 20 o C environment, PCM encapsulation may provide protection for 28 s of exposure to 1000 o C per PCM gram.

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Performance of phase change materials for heat storage thermoelectric harvesting

Cited by 19 publications

References 9 publications

Energy Harvesting Technologies for Structural Health Monitoring of Airplane Components—A Review

Energy Harvesting Technologies for Structural Health Monitoring of Airplane Components—A Review

Three-Dimensional Printed Insulation For Dynamic Thermoelectric Harvesters With Encapsulated Phase Change Materials

Protection of Electronics from Environmental Temperature Spikes by Phase Change Materials

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