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

Lameck Nkhonjera; Matthias Kuboth; Andreas König-Haagen; Geoffrey John; Cecil K. King'ondu; Dieter Brüggemann; Tunde Bello-Ochende

doi:10.1016/j.egypro.2016.07.165

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

Lameck Nkhonjera, Matthias Kuboth, Andreas König-Haagen, Geoffrey John, Cecil K. King'ondu, Dieter Brüggemann, Tunde Bello-Ochende

Research output: Contribution to journal › Article

Abstract

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

Original language	English
Pages (from-to)	160-167
Number of pages	8
Journal	Energy Procedia
Volume	93
DOIs	https://doi.org/10.1016/j.egypro.2016.07.165
Publication status	Published - Aug 2016
Event	Africa-EU Symposium on Renewable Energy Research and Innovation - Tlemcen, Algeria Duration: Mar 8 2016 → Mar 10 2016

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http://www.sciencedirect.com/science/article/pii/S1876610216305926

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Nkhonjera, L., Kuboth, M., König-Haagen, A., John, G., King'ondu, C. K., Brüggemann, D., & Bello-Ochende, T. (2016). Experimental Investigation of a Finned Pentaerythritol-based Heat Storage Unit for Solar Cooking at 150-200 ̊C. Energy Procedia, 93, 160-167. https://doi.org/10.1016/j.egypro.2016.07.165

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

abstract = "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 ",

author = "Lameck Nkhonjera and Matthias Kuboth and Andreas K{\"o}nig-Haagen and Geoffrey John and King'ondu, {Cecil K.} and Dieter Br{\"u}ggemann and Tunde Bello-Ochende",

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doi = "10.1016/j.egypro.2016.07.165",

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AU - Nkhonjera, Lameck

AU - Kuboth, Matthias

AU - König-Haagen, Andreas

AU - John, Geoffrey

AU - King'ondu, Cecil K.

AU - Brüggemann, Dieter

AU - Bello-Ochende, Tunde

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AB - 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

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