Ali N. Abdul Ghafoor,Munther Abdullah Mussa,



Energy storage,solidification,Shell and tube,Natural convection,PCM,


A numerical study to investigate the behaviour and impact of different inner tube geometric shapes on the thermal performance of the latent heat thermal energy storage (LHTES) unit have been done. Current work includes a horizontal concentric shell filling with paraffin wax as phase change material (PCM). The tested inner tube geometric shapes were circular tube, horizontal elliptical tube, and vertical elliptical tube. Finite-volume method with a single-domain enthalpy method have been used for the simulation. The results showed that the circular tube is the best due to keeping absorbing heat from PCM through HTF for a long time with 66.37% efficiency and 240.5 minutes.


I. Agarwal, Ashish, and R. M. Sarviya. 2016. “An Experimental Investigation of Shell and Tube Latent Heat Storage for Solar Dryer Using Paraffin Wax as Heat Storage Material.” Engineering Science and Technology, an International Journal 19 (1): 619–31.

II. Al-Abidi, Abduljalil A., Sohif Bin Mat, K. Sopian, M. Y. Sulaiman, and Abdulrahman Th Mohammed. 2013. “CFD Applications for Latent Heat Thermal Energy Storage: A Review.” Renewable and Sustainable Energy Reviews 20: 353–63.

III. Avci, Mete, and M. Yusuf Yazici. 2013. “Experimental Study of Thermal Energy Storage Characteristics of a Paraffin in a Horizontal Tube-in-Shell Storage Unit.” Energy Conversion and Management 73: 271–77.

IV. Esapour, M., M. J. Hosseini, A. A. Ranjbar, Y. Pahamli, and R. Bahrampoury. 2016. “Phase Change in Multi-Tube Heat Exchangers.” Renewable Energy 85: 1017–25.

V. Hosseini, M. J., M. Rahimi, and R. Bahrampoury. 2014. “Experimental and Computational Evolution of a Shell and Tube Heat Exchanger as a PCM Thermal Storage System.” International Communications in Heat and Mass Transfer 50: 128–36.

VI. Hosseini, M. J., A. A. Ranjbar, K. Sedighi, and M. Rahimi. 2012. “A Combined Experimental and Computational Study on the Melting Behavior of a Medium Temperature Phase Change Storage Material inside Shell and Tube Heat Exchanger.” International Communications in Heat and Mass Transfer 39 (9): 1416–24.

VII. Jesumathy, S. P., M. Udayakumar, S. Suresh, and S. Jegadheeswaran. 2014. “An Experimental Study on Heat Transfer Characteristics of Paraffin Wax in Horizontal Double Pipe Heat Latent Heat Storage Unit.” Journal of the Taiwan Institute of Chemical Engineers 45 (4): 1298–1306.

VIII. Kibria, M. A., M. R. Anisur, M. H. Mahfuz, R. Saidur, and I. H.S.C. Metselaar. 2014. “Numerical and Experimental Investigation of Heat Transfer in a Shell and Tube Thermal Energy Storage System.” International Communications in Heat and Mass Transfer 53: 71–78.

IX. Longeon, Martin, Adèle Soupart, Jean François Fourmigué, Arnaud Bruch, and Philippe Marty. 2013. “Experimental and Numerical Study of Annular PCM Storage in the Presence of Natural Convection.” Applied Energy 112: 175–84.

X. Mahdi, Mustafa S., Hameed B. Mahood, Ahmed F. Hasan, Anees A. Khadom, and Alasdair N. Campbell. 2019. “Numerical Study on the Effect of the Location of the Phase Change Material in a Concentric Double Pipe Latent Heat Thermal Energy Storage Unit.” Thermal Science and Engineering Progress 11: 40–49.

XI. Rathod, M. K., and J. Banerjee. 2014. “Experimental Investigations on Latent Heat Storage Unit Using Paraffin Wax as Phase Change Material.” Experimental Heat Transfer 27 (1): 40–55.

XII. Seddegh, Saeid, Xiaolin Wang, and Alan D. Henderson. 2016. “A Comparative Study of Thermal Behaviour of a Horizontal and Vertical Shell-and-Tube Energy Storage Using Phase Change Materials.” Applied Thermal Engineering 93: 348–58.

XIII. Senthil, Ramalingam, and Marimuthu Cheralathan. 2016. “Melting and Solidification of Paraffin Wax in a Concentric Tube PCM Storage for Solar Thermal Collector.” International Journal of Chemical 14 (4): 2634–40.

XIV. Yazici, Mustafa Yusuf, Mete Avci, Orhan Aydin, and Mithat Akgun. 2014. “On the Effect of Eccentricity of a Horizontal Tube-in-Shell Storage Unit on Solidification of a PCM.” Applied Thermal Engineering 64 (1–2): 1–9.

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