Improvement the performance of composite PCM paraffin-based incorporate with volcanic ash as heat storage for low-temperature application

Keywords: Composite phase change material, partial phase change, paraffin, thermal energy storage, volcanic ash


Paraffin is well known thermal energy storage with the high latent heat of fusion. Unfortunately, low thermal conductivity and low melting temperature inhibit large-scale applications for lower temperature applications like solar water heaters and desalination. The addition of high thermal conductivity material can increase the thermal conductivity of paraffin and increase the melting temperature of paraffin. In this study, a new approach is taken by using volcanic sand as thermal conductivity enhancement material. The properties of the sand are examined. The chemical composition of the sand is dominated by Fe (51.23 %), Fe2O3 (23.24 %) and SiO2 (11 %), which are known as good thermal conductivity materials. Six different compositions of paraffin/sand (weight ration) are tested to observe the melting and vapor temperature of the composite. Adding sand (with granule size of 44 µm) by 30 wt % can accelerate the charging rate by 25 % compared to pure paraffin, where the discharging rate is increased significantly by 17.8 %. The supercooling degree of the composite is only 1 °C, where pure paraffin has a supercooling degree by 8 °C. The charging and discharging characteristics for each sample are discussed in detail within the article. Overall, the addition of volcanic sand improves paraffin's charging and discharging rate, reducing the supercooling degree and can be considered a convenient method to improve the paraffin performance as latent heat storage


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Author Biographies

Dwi Rahmalina, Universitas Pancasila

Department of Mechanical Engineering

Dwi Chandra Adhitya, Universitas Pancasila

Department of Master in Mechanical Engineering

Reza Abdu Rahman, Universitas Pancasila

Department of Mechanical Engineering

Ismail Ismail, Universitas Pancasila

Department of Mechanical Engineering


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How to Cite
Rahmalina, D., Adhitya, D. C., Rahman, R. A., & Ismail, I. (2021). Improvement the performance of composite PCM paraffin-based incorporate with volcanic ash as heat storage for low-temperature application. EUREKA: Physics and Engineering, 3-11.