Evaluation of methods to fully saturate carbon foam with paraffin wax phase change material for energy storage

Warzoha, Ronald J.; Sanusi, Omar; McManus, Brian; Fleischer, Amy S.

doi:10.1109/itherm.2012.6231513

Cited by 8 publications

(5 citation statements)

References 33 publications

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“…The microstructures of the as-received graphite foams are shown in Figure 2. As measured by a gas pycnometer, the HD foam has a density of 0.89±0.01 g/cm 3 Then, the infiltration rate of the samples was calculated as follows [25]:…”

Section: Resultsmentioning

confidence: 99%

“…Recent development of graphite foams with extremely high bulk thermal conductivities [21] has led to several investigations on using them for improving the thermal performance of low thermal conductivity materials [22][23][24][25][26][27][28]. Zhong et al [24] showed that the thermal diffusivity of a paraffin/graphite foam composite was 570 times higher than that of pure paraffin wax.…”

Section: Introductionmentioning

confidence: 99%

“…Zhong et al [24] showed that the thermal diffusivity of a paraffin/graphite foam composite was 570 times higher than that of pure paraffin wax. Warzoha et al [25,26] used a simple submersion technique combined with a vacuum infiltration technique to infiltrate the foam with paraffin wax. Their results showed that the vacuum infiltration technique was better as compared to the simple submersion technique, and it can fully infiltrate the foam with paraffin wax.…”

Section: Introductionmentioning

confidence: 99%

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Development of graphite foam infiltrated with MgCl2 for a latent heat based thermal energy storage (LHTES) system

Singh

Kim

et al. 2016

Renewable Energy

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Thermal energy storage (TES) systems that are compatible with high temperature power cycles for concentrating solar power (CSP) require high temperature media for transporting and storing thermal energy. To that end, TES systems have been proposed based on the latent heat of fusion of the phase change materials (PCMs). However, PCMs have relatively low thermal conductivities. In this paper, use of high-thermal-conductivity graphite foam infiltrated with a PCM (MgCl 2 ) has been investigated as a potential TES system. Graphite foams with two porosities were infiltrated with MgCl 2 . The infiltrated composites were evaluated for density, heat of fusion, melting/freezing temperatures, and thermal diffusivities. Estimated thermal conductivities of MgCl 2 /graphite foam composites were significantly higher than those of MgCl 2 alone over the measured temperature range. Furthermore, heat of fusion, melting/freezing temperatures, and densities showed comparable values to those of pure MgCl 2 . Results of this study indicate that MgCl 2 /graphite foam composites show promise as storage media for a latent heat thermal energy storage system for CSP applications.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Development of graphite foam infiltrated with MgCl2 for a latent heat based thermal energy storage (LHTES) system

Singh

Kim

et al. 2016

Renewable Energy

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“…The study based on properties like heat of fusion, melting temperature, density and thermal conductivity. These prepared a list of nine favorable phase changing materials, suitable for thermal energy storage (Warzoha et al, 2012), investigated experimentally the effect of infiltration method on paraffin PCM saturation rate within graphite foams. The foam was infiltrated by two methods: a vacuum infiltration technique and a simple submersion technique.…”

Section: Introductionmentioning

confidence: 99%

Thermal Characteristics of Phase Change Material Used as Thermal Storage System by Using Solar Energy

Nasir¹,

Ali

Mamoori³

2021

Kufa J. Eng.

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In this paper, the melting processes of phase change material in a shell and tube heat exchanger by using solar thermal energy have been investigated numerically and experimentally. All experimental were outdoor tested at AL-Mussaib city-Babylon-Iraq (Lat 32.5 º North, and long 44.3 º East) with N-S collector direction at tilt angle of 32.5 º with the horizontal. The phase change material used in this work is black color Iraqi origin pure Paraffin with amount of 12 kg. In the experimental setup evacuted tube solar collector is employed for melting phase change material in shell regime. Different volume flow rates for the water flow inside the inner tube of heat exchanger namely (200, 300, and 500 LPH) for Reynolds number namely (15000, 23000, 38000) respectively were used for each season from August 2016 to January 2017. The numerical investigation involves a three dimension numerical solution of model by a commercial package ANSYS FLUENT 15.0. The boundary conditions of the model that solved by the numerical solution have been taken from the experimental tests. The experimental results indicated that the inner tube inlet and ambient temperatures has a significant effects on the melting process compared with the volume flow rates. Studying phase change material temperature distribution, it is exposed that a melting temperature of the phase change material in summer season needed time of (3-4) hours only, while it needed more time; (14-16) hours in winter season. Increasing solar radiation and ambient temperature reduces the melting time of phase change material. Increasing water temperature difference of inner tube increased the heat gained for phase change material. The results obtained from numerical solution presented the static temperature contours and showed that the temperature distribution of phase change material give good validations with experimental results with percentage deviation of 2.7%. The present experimental results have been compared with the previous studies and give a good agreement with increasing for present work of 25.9 %.

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“…They found that the thermal diffusivity of the paraffin-GF can be enhanced as much as 570 times as compared with that of pure paraffin wax. Warzoha et al [10] investigated the effect of infiltration method on the saturation rate of paraffin PCM within graphite foam. They used two methods to infiltrate the foam: a simple submersion technique and a vacuum infiltration technique.…”

Section: Introductionmentioning

confidence: 99%

High Efficiency Thermal Energy Storage System for Concentrated Solar Power (CSP)

Singh

et al. 2017

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Evaluation of methods to fully saturate carbon foam with paraffin wax phase change material for energy storage

Cited by 8 publications

References 33 publications

Development of graphite foam infiltrated with MgCl2 for a latent heat based thermal energy storage (LHTES) system

Development of graphite foam infiltrated with MgCl2 for a latent heat based thermal energy storage (LHTES) system

Thermal Characteristics of Phase Change Material Used as Thermal Storage System by Using Solar Energy

High Efficiency Thermal Energy Storage System for Concentrated Solar Power (CSP)

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