The Research and Technology Center for Energy

Hammam-Lif, Tunisia

The Research and Technology Center for Energy

Hammam-Lif, Tunisia
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El Khadraoui A.,The Research and Technology Center for Energy | Bouadila S.,The Research and Technology Center for Energy | Kooli S.,The Research and Technology Center for Energy | Farhat A.,The Research and Technology Center for Energy | Guizani A.,The Research and Technology Center for Energy
Journal of Cleaner Production | Year: 2017

An indirect type forced convection solar dryer using Phase Change Material (PCM) was designed, constructed and experimentally investigated. The dryer consists of a solar air panel for a direct heating of the drying agent, a solar energy accumulator (solar air collector with PCM cavity) and a drying chamber. The solar dryer was tested under no load with and without PCM. The present study is aimed at investigating the feasibility of using a solar air heater with PCM to store the solar energy during the daytime, and to release it during the night. Experiments were conducted to evaluate the charging and the discharging characteristics of the latent storage unit (PCM cavity). The daily energy efficiency of the solar energy accumulator reached 33.9%, while the daily exergy efficiency reached 8.5%. The results show that after using the solar energy accumulator, the temperature of the drying chamber is higher than the ambient temperature by 4–16 °C, all the night. In addition, the relative humidity in the drying chamber was observed 17–34.5% lower than the ambient relative humidity, in the case of the solar dyer with PCM. © 2017 Elsevier Ltd


El Khadraoui A.,The Research and Technology Center for Energy | Bouadila S.,The Research and Technology Center for Energy | Kooli S.,The Research and Technology Center for Energy | Guizani A.,The Research and Technology Center for Energy | Farhat A.,The Research and Technology Center for Energy
Applied Thermal Engineering | Year: 2016

In the present work an experimental study is made to enhance the efficiency of a simple fabricated Solar Air Heater (SAH) by using the thermal heat storage. A rectangular cavity filled with a Paraffin wax is used as a latent storage unit. An experimental study of two similar designed solar air collector (with and without Phase Change Material), is carried out to evaluate the PCM unit importance. The results show that during the night the outlet air temperature of the SAH was enhanced with using PCM. The daily energy efficiency of the SAH without PCM reached 17%, while the daily energy efficiency of the SAH with PCM reached 33%. © 2016 Elsevier Ltd

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