Preparing side charging of PCM storage: Theoretical and experimental investigation

A. H. Tesfay, F. Y. Hagos, K. G. Yohannes, O. J. Nydal, M. B. Kahsay

Research output: Contribution to journalConference articlepeer-review

4 Citations (Scopus)

Abstract

In Ethiopia, there is an abundant source of solar energy that is estimated to 5.3 kWh/m2/day. However, more than 90% of the society uses biomass as a main source of energy for cooking due to lack of technologies to convert this energy. Replacing these cooking activities by using renewable energy resources decreases pollution and reduces deforestation significantly. Using the solar energy in day time has no problem. For night time however, the system needs some kind of back-up system to make the daytime solar energy available. This back-up should have high-density energy storage and constant working temperature to perform a specific application. Latent heat storage using phase change materials (PCM) is one way of storing thermal energy. In the current study, a latent heat storage that uses a PCM material is used to store the solar energy aimed at utilizing solar energy for cooking Injera, main staple bread in Ethiopia. The PCM is a mixture of 60% NaNO3 and 40% KNO3 that are known as solar salts. The storage has a welded parallel aluminum fins with a gap of 40 mm in between to enhance the thermal conductivity during the charging-discharging process of the storage. The fins are extruded outside of the storage container to enable a side charging technique for the PCM. A prototype was developed with a solar salt of 17.5 kg and is tested for charging-discharging. The numerical simulation done on ANSYS and experimental results show an agreement and the system registered a 41.6% efficiency.

Original languageEnglish
Article number012021
JournalIOP Conference Series: Materials Science and Engineering
Volume100
Issue number1
DOIs
Publication statusPublished - Dec 22 2015
Event3rd International Conference of Mechanical Engineering Research, ICMER 2015 - Kuantan, Pahang, Malaysia
Duration: Aug 18 2015Aug 19 2015

ASJC Scopus subject areas

  • Materials Science(all)
  • Engineering(all)

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