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Experimental Investigation of a Finned Pentaerythritol-based Heat Storage Unit for Solar Cooking at 150-200 ̊C

Title data

NKhonjera, Lameck ; Kuboth, Matthias ; König-Haagen, Andreas ; John, Geoffrey ; King’ondu, Cecil ; Brüggemann, Dieter ; Bello-Ochende, Tunde:
Experimental Investigation of a Finned Pentaerythritol-based Heat Storage Unit for Solar Cooking at 150-200 ̊C.
In: Energy Procedia. Vol. 93 (August 2016) . - 160 - 167.
ISSN 1876-6102
DOI: https://doi.org/10.1016/j.egypro.2016.07.165

Abstract in another language

An experimental study on the charging and discharging performance of a finned thermal energy storage unit (TESu) that utilizes pentaerythritol (PE) as phase change material (PCM) was conducted. It is known that fins enhance the heat transfer within TESu, however, the optimum PCM to fin volume ratio for a particular application is usually unknown. Therefore, this work compares the charging and discharging performances of three rectangular TESu prototypes with 6, 12, and 21 PE to fin volume ratio (P/F) per prototype. The performance comparison was in terms of (1) charging rapidity, (2) heat retention effectiveness, (3) temperature distribution, and (4) the cooking power. It is found that for 6 ≤ P/F ≤21, charging rapidity decreases with PE/fins ratio. On the other hand, the PE/fin volume ratio of higher than P/F > 12 has great influence on heat retention effectiveness, temperature distribution in the TESu, and cooking power. Therefore, 6 < P/F <12 strikes a balance between charging rapidity and discharging performance (heat retention time, improved temperature field as well cooking power). However, generalization to TESu for cooking application pends extension of this work to other PCM operated TESu.

Further data

Item Type: Article in a journal
Refereed: Yes
Additional notes: Africa-EU Symposium on Renewable Energy Research and Innovation
Keywords: Pentaerythritol; fin; thermal energy storage; solar cooker
Institutions of the University: Faculties > Faculty of Engineering Science > Chair Engineering Thermodynamics and Transport Processes
Faculties > Faculty of Engineering Science > Chair Engineering Thermodynamics and Transport Processes > Chair Engineering Thermodynamics and Transport Processes - Univ.-Prof. Dr.-Ing. Dieter Brüggemann
Profile Fields > Emerging Fields > Energy Research and Energy Technology
Research Institutions > Research Units > ZET - Zentrum für Energietechnik
Result of work at the UBT: Yes
DDC Subjects: 600 Technology, medicine, applied sciences > 620 Engineering
Date Deposited: 01 Mar 2019 08:41
Last Modified: 01 Mar 2019 08:44
URI: https://eref.uni-bayreuth.de/id/eprint/47431