Investigation of Paraffin Wax with ZnO Nanorods for Performance Enhancement of Solar Thermal Energy Storage.
Sokar, M., Mansour, S., Ali, A., Elnekiety, M. (2020). Investigation of Paraffin Wax with ZnO Nanorods for Performance Enhancement of Solar Thermal Energy Storage.. EKB Journal Management System, 45(3), 19-28. doi: 10.21608/bfemu.2020.111571
Mohamed Saber Sokar; Shehab Ahmed Mansour; Ali Abdel Aziz Ali; Malek Hegazy Elnekiety. "Investigation of Paraffin Wax with ZnO Nanorods for Performance Enhancement of Solar Thermal Energy Storage.". EKB Journal Management System, 45, 3, 2020, 19-28. doi: 10.21608/bfemu.2020.111571
Sokar, M., Mansour, S., Ali, A., Elnekiety, M. (2020). 'Investigation of Paraffin Wax with ZnO Nanorods for Performance Enhancement of Solar Thermal Energy Storage.', EKB Journal Management System, 45(3), pp. 19-28. doi: 10.21608/bfemu.2020.111571
Sokar, M., Mansour, S., Ali, A., Elnekiety, M. Investigation of Paraffin Wax with ZnO Nanorods for Performance Enhancement of Solar Thermal Energy Storage.. EKB Journal Management System, 2020; 45(3): 19-28. doi: 10.21608/bfemu.2020.111571

Investigation of Paraffin Wax with ZnO Nanorods for Performance Enhancement of Solar Thermal Energy Storage.

MEJ- Mansoura Engineering Journal
Article 15, Volume 45, Issue 3, September 2020, Page 19-28  XML PDF (851.47 K)
Document Type: Research Studies
DOI: 10.21608/bfemu.2020.111571
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Authors
Mohamed Saber Sokar email orcid 1; Shehab Ahmed Mansour2; Ali Abdel Aziz Ali3; Malek Hegazy Elnekiety3
1Mechanical Engineering Department, Faculty of Engineering at Shoubra, Benha University, Cairo, Egypt.
2Basic Engineering Science Department, Faculty of Engineering, Menoufia University, Shebin El-Kom, Egypt
3Mechanical Engineering Department, Faculty of Engineering at Shoubra, Benha University, Cairo, Egypt
Abstract
This paper discusses the influence of paraffin wax inoculated with ZnO-nanorods on the latent heat of thermal energy storage (LHTES) of solar water heating system. The main objective of the experimental study is to determine the percentage increase in thermal storage capacity of using paraffin wax with 0.15 wt.% ZnO-nanorods as nano-composite phase change material (NCPCM) to the raw paraffin wax as base phase change material (PCM). The experiments were performed by 33-liter insulated stainless-steel storage shell TES tank containing 21 copper tubes 5/8-inch in diameter. The TES tank is filled with circulating water and the tubes are filled with either the pure PCM or NCPCM. The water is the heat transfer fluid (HTF) in the TES tank. The experiments were done at different HTF flow rates to study the best flow rate that increases both the amount of heat transfer and melting rate of PCM. It was found that 0.15 wt.% ZnO NCPCM decreases the charging and discharging time compared to the pure PCM, and a percentage increase is achieved in thermal energy storage by 20% when using 0.15 wt.% ZnO nanorods. The results also reveal that the maximum discharge energy was raised from 266 kW for pure paraffin wax to 306 kJ for 0.15 wt.% ZnO NCPCM. The NCPCM at 6 l/min HTF flow rate provides the highest energy recovery ratio (ERR), while the smallest occurs at 9 l/min.
Keywords
Thermal energy storage (TES); Solar heating system; Nanocomposite PCM
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