Design and analysis of PCM integrated solar receiver with double-helical tube structure

Bashir, Muhammad Anser; Ali, Hafiz Muhammad

doi:10.1016/j.est.2024.110872

Cited by 4 publications

(1 citation statement)

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“…Phase change materials (PCMs) are preferred in thermal energy storage systems due to their excellent energy storage properties [ 1 , 2 ]. In particular, using PCMs in implementations such as solar power systems [ 3 , 4 ] and waste heat recovery systems [ 5 , 6 ] plays an important role in improving the energy storage efficiency of these systems. Recently, scientists have been focusing on such thermal storage systems by investigating the properties of PCMs, such as a high storage capacity for low-temperature applications.…”

Section: Introductionmentioning

confidence: 99%

Experimental and Numerical Investigation of Macroencapsulated Phase Change Materials for Thermal Energy Storage

Arslan,

Ilbas

2024

Materials

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Among the different types of phase change materials, paraffin is known to be the most widely used type due to its advantages. However, paraffin’s low thermal conductivity, its limited operating temperature range, and leakage and stabilization problems are the main barriers to its use in applications. In this research, a thermal energy storage unit (TESU) was designed using a cylindrical macroencapsulation technique to minimize these problems. Experimental and numerical analyses of the storage unit using a tubular heat exchanger were carried out. The Ansys 18.2-Fluent software was used for the numerical analysis. Two types of paraffins with different thermophysical properties were used in the TESU, including both encapsulated and non-encapsulated forms, and their thermal energy storage performances were compared. The influence of the heat transfer fluid (HTF) inlet conditions on the charging performance (melting) was investigated. The findings demonstrated that the heat transfer rate is highly influenced by the HTF intake temperature. When the effect of paraffin encapsulation on heat transfer was examined, a significant decrease in the total melting time was observed as the heat transfer surface and thermal conductivity increased. Therefore, the energy stored simultaneously increased by 60.5% with the encapsulation of paraffin-1 (melting temperature range of 52.9–60.4 °C) and by 50.7% with the encapsulation of paraffin-2 (melting temperature range of 32.2–46.1 °C), thus increasing the charging rate.

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