Numerical investigation of nano-enhanced phase change material melting in the 3D annular tube with spiral fins

Duan, Juan; Peng, Zeyu

doi:10.1016/j.renene.2022.05.014

Cited by 16 publications

(2 citation statements)

References 36 publications

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“…Energy ratio. The stored energy by PCM is directly proportionate to the variation of initial and instantaneous average PCM temperature and is given by equation (8). The energy ratio during melting is defined as the energy absorbed by PCM to the maximum quantity of energy that PCM can absorb and is given by equation (11).…”

Section: Meltingmentioning

confidence: 99%

“…4 This results in large melting and solidification time, which further results in a decrease in TES effectiveness. To increase the heat transfer rate, usage of techniques like increase in surface area, [5][6][7][8][9][10] the inclusion of nanoparticles, [11][12][13] encapsulation, 14,15 metal foam, 16,17 cascading, 1 placing HTF tube in eccentric position 18 and hybrid techniques 19,20 were suggested in the literature. Although there are many configurations for PCM HXs almost 70% of researchers use S&T-HXs due to minimal heat loss.…”

Section: Introductionmentioning

confidence: 99%

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Effect of fin configuration and orientation of latent heat storage system on the melting and solidification performance

Amudhalapalli

Devanuri

2023

Proceedings of the Institution of Mechanical Engineers, Part C:

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Phase change materials (PCMs) are used to store thermal energy. They possess high specific energy at nearly constant temperatures. The usage of the PCMs is limited due to their very low thermal conductivity, which results in poor heat transfer. To overcome this problem usage of fins is a potential technique. In the current analysis, the surface area of the heat transfer fluid (HTF) tube is increased by radial (R-type), spiral (S-type), and longitudinal (L-type) fins. A 3D numerical analysis of melting and solidification is carried out on R-type, S-type, and L-type shell and tube (S&T) PCM heat exchanger (HX) by considering the inclination effects. Lauric acid is used as PCM. Phase change time, energy ratio, and exergy efficiency are considered to analyze the performance of HXs. MOORA analysis is carried out to select the best HX. It is observed that R-type HX at the vertical position has shown better performance among the selected HXs. Among the considered geometries, the maximum average exergy efficiency is obtained for 45° inclination with R-type HX and minimum for horizontally positioned L-type HX during both melting and solidification. The charging time of the vertically positioned HX, when compared to 45o oriented HX with R type, S type, and L type HX is observed to decrease by 47.5%, 45.7%, and 23%, respectively.

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Section: Meltingmentioning

confidence: 99%