Experimental performance of a finned spherical container in cold thermal storage for tropical buildings

Premnath, D; Chandrasekaran, P.; Subramanian, Thiyagarajan; Senthil, Ramalingam

doi:10.1007/s11356-022-21286-8

Cited by 5 publications

(1 citation statement)

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“…The results showed that copper-plated spheres with pins had a 37% reduction in phase transition time compared to normal PCM spheres. Premnath [24] experimentally investigated frozen water in stainless-steel spherical containers with inner fins of different lengths. The results show that in a spherical vessel with a diameter of 75 mm, it is recommended to install four 13.5 mm-long heat sinks to achieve maximum heat flux.v.…”

Section: Introductionmentioning

confidence: 99%

Enhanced Heat Transfer Study of Spherical Heat Storage Based on Response Surface Methodology

Tian

Gong

et al. 2023

Applied Sciences

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In this paper, the effect of melting characteristics of CuO/paraffin wax composite phase change material in a spherical heat storage unit in a constant temperature water bath is investigated. Experiments were conducted in three different water bath temperatures (65 °C, 70 °C, and 75 °C). The inner surface of the sphere was fixed with two, four, and six pin-shaped fins 3 mm in diameter. The spheres were filled with different mass fractions of CuO nanoparticles/paraffin phase change materials. Experimental CCD was used to model and optimize the spherical thermal storage unit. Regression models were developed to predict the effects of various operational factors on the melting time of the composite PCM. The factors in the model included the number of pin fins in the spherical heat storage unit, the water bath temperature, and the content of added CuO nanoparticles in the PCM, and ANOVA was used to statistically validate the regression model. The results showed that the interaction between the water bath temperature and the number of pin fins had the most significant effect on the melting time. With the melting time of the phase change material as the optimized objective function, the optimized optimal working condition was six pin fins, a water bath temperature of 75 °C, and the addition of 5 wt% CuO nanoparticles/paraffin phase change material, and the actual melting time under this condition was 78.9 min, which was lower than the predicted value of 79.4 min, with an error of 0.63% between them.

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Section: Introductionmentioning

confidence: 99%