Journal Pre-proofs Experimental investigations on the thermal performance of an ice storage sys- tem using twin concentric helical coil H.E. Abdelrahman, H.A. Refaey, A. Alotaibi, A. Ali A. Abdel-Aziz, M.F. Abd Rabbo PII: S1359-4311(20)33219-1 DOI: https://doi.org/10.1016/j.applthermaleng.2020.115737 Reference: ATE 115737 To appear in: Applied Thermal Engineering Received Date: 13 April 2020 Revised Date: 10 July 2020 Accepted Date: 12 July 2020 Please cite this article as: H.E. Abdelrahman, H.A. Refaey, A. Alotaibi, A. Ali A. Abdel-Aziz, M.F. Abd Rabbo, Experimental investigations on the thermal performance of an ice storage system using twin concentric helical coil, Applied Thermal Engineering (2020), doi: https://doi.org/10.1016/j.applthermaleng.2020.115737 This is a PDF file of an article that has undergone enhancements after acceptance, such as the addition of a cover page and metadata, and formatting for readability, but it is not yet the definitive version of record. This version will undergo additional copyediting, typesetting and review before it is published in its final form, but we are providing this version to give early visibility of the article. Please note that, during the production process, errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain. © 2020 Elsevier Ltd. All rights reserved.