Enhancement of Heat Transfer by Inserting a Metal Matrix Into a Phase Change Material

Tong, Xinglin; Khan, Jamil A.; Ruhulamin, M.

doi:10.1080/10407789608913832

Cited by 129 publications

(45 citation statements)

References 10 publications

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“…In this work, two concentric spheres are considered where several dimensions for external radius (R), internal radius (r) and, therefore, thickness (T) are used: (11,10), (22,20), (33,30), (55,50), (66,60), (77,70), (110, 100), (220, 200), (330, 300). Since previous studies used different dimensions, making it difficult to decide a correct dimension, this evaluation is performed in order to know the effects of increasing geometry dimensions.…”

Section: Geometry Characterizationmentioning

confidence: 99%

Encapsulated Nitrates Phase Change Material Selection for Use as Thermal Storage and Heat Transfer Materials at High Temperature in Concentrated Solar Power Plants

et al. 2017

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Abstract:In the present paper, the finite element method is used to perform an exhaustive analysis of the thermal behavior of encapsulated phase change materials (EPCMs), which includes an assessment of several materials in order to identify the best combination of PCM and shell material in terms of thermal energy storage, heat transfer rate, cost of materials, limit of pressure that they can support and other criteria. It is possible to enhance the heat transfer rate without a considerable decrease of the thermal energy storage density, by increasing the thickness of the shell. In the first examination of thermomechanical coupling effects, the technical feasibility can be determined if the EPCM dimensions are designed considering the thermal expansion and the tensile strength limit of the materials. Moreover, when a proper EPCM shell material and PCM composition is used, and compared with the current storage methods of concentrated solar power (CSP) plants, the use of EPCM allows one to enhance significantly the thermal storage, reaching more than 1.25 GJ/m 3 of energy density.

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Section: Geometry Characterizationmentioning

confidence: 99%

Encapsulated Nitrates Phase Change Material Selection for Use as Thermal Storage and Heat Transfer Materials at High Temperature in Concentrated Solar Power Plants

et al. 2017

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“…Organic materials usually do not have these disadvantages, but in most cases have lower phase change enthalpy and thermal conductivity, and in all cases are flammable. Hoogendoorn and Bart [7] and Tong et al [8] investigated enhancement of the thermal performance of organic PCMs through the use of a thin aluminium matrix. Tong et al [8] analysed enhancement of heat transfer in a PCM by inserting an aluminium matrix during melting and solidification.…”

Section: Introductionmentioning

confidence: 99%

“…Hoogendoorn and Bart [7] and Tong et al [8] investigated enhancement of the thermal performance of organic PCMs through the use of a thin aluminium matrix. Tong et al [8] analysed enhancement of heat transfer in a PCM by inserting an aluminium matrix during melting and solidification. Velraj et al [9] addressed the problem of low thermal conductivity in PCMs and its drawbacks on the energy storage process.…”

Section: Introductionmentioning

confidence: 99%

Heat transfer enhancement of fatty acids when used as PCMs in thermal energy storage

Mazman

Cabeza

Mehling

et al. 2008

Int. J. Energy Res.

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SUMMARYPhase change materials (PCM) used in latent heat storage systems usually have very low thermal conductivities. This is a major drawback in maintaining the required heat exchange rate between PCM and heat transfer fluid. This paper investigates the enhancement of the heat transfer between PCM and heat transfer fluid, using high thermal conductivity as additives like stainless steel pieces, copper pieces and graphite-PCM composite material. In the experiments, palmitic-lauric acid (80:20) (PL) and stearic-myristic acid (80:20) (SM) were used as PCMs. Test results show that heat transfer enhancement of copper pieces was better at 0.05 L s À1 flow rate compared to 0.025 L s À1 . Using copper as an additive increased the heat transfer rate 1.7 times for melting and 3.8 times for freezing when flow rate was 0.050 L s À1 . Decreasing the flow rate from 0.050 to 0.025 L s À1 , increased the melting times 1.3 times and freezing times 1.8 times, decreasing heat transfer rates accordingly. The best result of heat transfer enhancement was observed for the PCMgraphite composite. However, changing the flow rate did not affect the heat transfer rate when graphite was used as additive.

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“…Many researchers made a theoretical study on the thermal performance of the PCM [33][34][35][36][37][38], and they proposed different methods to enhance its heat transfer efficiency [39]. The finned tubes of different configurations are used to enhance the heat transfer of the latent heat storage system [40][41][42][43][44][45][46][47][48][49][50]. Other techniques implemented for the improvement of heat transfer are insertion of PCM in metal matrix [51,52], dispersion of PCM with high conductive particles [53], micro encapsulation of PCM [54,55], usage of carbon fiber brushes with high thermal conductivity [56], embedded graphite matrix [57,58], enhancing thermal conductivity using exfoliated graphite [59], insertion of copper plates in spherical capsules [60], metal spheres inside the PCM [61], usage of aluminum foam [62], carbon loading to improve thermal conductivity [63].…”

Section: Required Characteristics Of Pcmmentioning

confidence: 99%

An Organic Composite Phase Change Material for Hot Food Storage, A Review

al.¹

2018

IJMPERD

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The paper reviews about the implementation of Latent Heat Storage System in the food storage techniques, due to its high-energy density and isothermal nature. It helps in sustaining the temperature of the hot food for a long time, thus preventing the pathogen growth. Adverse effects are faced by the children due to the pathogen growth in the food.Reasons for the cause of foodborne illness in the children were discussed. The characteristics of the phase change material (PCM) for the latent heat storage was described in detail. Finally, preparation and commercial feasibility of the PCM were studied and presented.

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Enhancement of Heat Transfer by Inserting a Metal Matrix Into a Phase Change Material

Cited by 129 publications

References 10 publications

Encapsulated Nitrates Phase Change Material Selection for Use as Thermal Storage and Heat Transfer Materials at High Temperature in Concentrated Solar Power Plants

Encapsulated Nitrates Phase Change Material Selection for Use as Thermal Storage and Heat Transfer Materials at High Temperature in Concentrated Solar Power Plants

Heat transfer enhancement of fatty acids when used as PCMs in thermal energy storage

An Organic Composite Phase Change Material for Hot Food Storage, A Review

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