Thermal Energy Storage Through Melting of a Commercial Phase-Change Material in a Horizontal Cylindrical Annulus

Tabassum, Tonny; Hasan, Mainul; Begum, Latifa

doi:10.1615/jenhheattransf.2018024676

Cited by 7 publications

(3 citation statements)

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“…Tabassum [13] investigate the melting characteristics of impure PCM embedded between two concentric circular horizontal cylinders. The inner cylindrical tube was heated to a constant temperature by a heat transfer fluid while the outer tube was insulated.…”

Section: Introductionmentioning

confidence: 99%

Melting/Solidification Processes of PEG 1500 in Vertical and Horizontal Annular Enclosure

Hamad¹,

Egelle²,

Mohammed³

et al. 2021

JEPT

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In this paper, the primary aim is to look at the fundamental melting/solidification processes of polyethylene glycol 1500 (PEG 1500) for energy storage – insulation to prolong the cooling time of pipelines in unexpected shut-down conditions, prevent/minimize the wax deposition, and hydrate formation. Polyethylene glycol 1500 was selected because its melting temperature is >317 K making it a suitable candidate as lagging material to prevent wax deposition and hydrate formation in subsea oil pipelines. Experimental apparatus was designed with the Perspex to give an insight into the melting process. Vertical and horizontal annular geometries were used to consider the real-life cases. The vertical annular enclosure length is 950 mm and 34 mm width (Height/Width=27.94). The horizontal annular enclosure length is 300mm and 15.9 mm width (Height/Width=18.87). The thermocouples and camera are used to collect the data for three cases of inner wall temperature of 333 K,343 K and 353 K where is the heat added to the phase change material (PCM) for both cases. The main conclusions are: i) the horizontal annular case melt faster than the vertical case, in particular, at higher heating surface temperature of 353 K, ii)The temperature of the inner region was remained hot for long time which provide a good evidence that support the concept of using the PCM as heat storage–insulation material; iii) the melting percentage for horizontal case is 100% higher from the melting percentage of vertical case at 333 K which reduced to about 20% for 343 K, iv) increasing the heating surface temperature substantially reduces the total melting time for both orientations.

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Section: Introductionmentioning

confidence: 99%

Melting/Solidification Processes of PEG 1500 in Vertical and Horizontal Annular Enclosure

Hamad¹,

Egelle²,

Mohammed³

et al. 2021

JEPT

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“…Use of phase-change materials (PCMs) for latent heat energy storage is a promising and efficient solution for storing thermal and solar energy (Zhang and Faghri, 2017;Tabassum et al, 2018;Aumporn et al, 2018). Phase-change energy storage material (PCESM) absorbs or releases heat when it changes phases from solid to solid, solid to liquid, liquid to gas, or the reverse.…”

Section: Introductionmentioning

confidence: 99%

Using Organic Phase-Change Materials for Enhanced Energy Storage in Water Heaters: An Experimental Study

et al. 2019

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Organic phase-change material for enhanced energy storage was prepared by adding SiO 2 particles in a certain proportion into molten palmitic acid (PA) with stirring and intensive sonication at a constant temperature. The thermal properties of the SiO 2 /PA composite were experimentally characterized. As compared with pure PA, the latent heat capacity of the composite with the addition of 3 wt% SiO 2 particles is increased by 51.7 kJ/kg, reaching 214.7 kJ/kg, which is the highest value among the composites tested with varying SiO 2 ratio from 1 to 5 wt%; the thermal conductivity of the 3 wt% SiO 2 /PA composite is also increased by 12% at 30 • C (solid state) and 7% at 70 • C (liquid state), respectively. A water heater was built and tested with embedded capsules containing the 3 wt% SiO 2 /PA composite and pure PA, respectively. The lab-built phase-change water heater is much smaller in size than an ordinary household water heater in comparison and uses reduced electrical power. However, it responds faster and has a larger volume ratio of hot water output to water heater size. During the turning-off test, the water heater with 3 wt% SiO 2 /PA can provide 2.23 times hot water volume of heater size; while the ordinary water heater can only provide 1.41 times hot water volume of tank size.

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“…However, the heat transfer efficiency of the current phase-change heat storage system is too low to meet the requirements of high-power electronic devices. On one hand, the low thermal conductivity of commonly used PCMs severely restricts the thermal conductivity of the phase-change process and reduces the heat transfer performance of the phase-change heat storage system (Tabassum et al, 2018). On the other hand, the weak flow of the working fluid, which restricts the capacity of the convective heat transfer in the phase-change process, results in an inhomogeneous distribution of temperature in the phase-change heat storage system, which may cause overheating in severe cases.…”

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confidence: 99%

Enhancement of Gallium Phase-Change Heat Transfer by Copper Foam and Ultrasonic Vibration

Niu

et al. 2020

J Enh Heat Transf

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In this study, the effects of copper foam and ultrasonic vibration on the melting process of lowmelting gallium in a rectangular vessel were experimentally investigated. The effective thermal conductivity, heating wall temperature, most melting duration, and total melting duration during the gallium's melting process were examined for various heating powers. We found that a portion of the gallium remained solid in the corners of the vessel in the late melting stage, and melting the remaining solid portion accounted for approximately 28% of the total melting duration of the pure gallium. In our test, the corresponding heating wall temperature rose significantly during this stage, which reduced the usable volume of the vessel. However, by the addition of copper foam and ultrasonic waves the remaining solid portion was greatly reduced, and the heating wall temperature was controlled. The total melting time for the gallium with added copper foam and ultrasonic waves was reduced by 10% and 17%, respectively, below that for the pure gallium melting process. When heat was added using ultrasonic waves for a long period of the melting process, the temperature of the heating surface was consistently lower than a pure gallium heat regenerator without ultrasonic waves. This would enhance the value of workable condition power for devices.

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Thermal Energy Storage Through Melting of a Commercial Phase-Change Material in a Horizontal Cylindrical Annulus

Cited by 7 publications

References 0 publications

Melting/Solidification Processes of PEG 1500 in Vertical and Horizontal Annular Enclosure

Melting/Solidification Processes of PEG 1500 in Vertical and Horizontal Annular Enclosure

Using Organic Phase-Change Materials for Enhanced Energy Storage in Water Heaters: An Experimental Study

Enhancement of Gallium Phase-Change Heat Transfer by Copper Foam and Ultrasonic Vibration

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