Performance of Cylindrical Plastic Solar Collectors for Air Heating.

Bassiouny, M.; Abddullah, A. S.

doi:10.21608/bfemu.2020.122169

Performance of Cylindrical Plastic Solar Collectors for Air Heating.

Document Type : Research Studies

Authors

M. Bassiouny ¹
A. S. Abddullah ²

¹ Mechanical Power Engineering Department ., Faculty of Engineering., Menoufia University., Shebin El-Kom., Egypt.

² Mechanical Power Engineering Department., Faculty of Engineering., Tanta University., Tanta., Egypt.

10.21608/bfemu.2020.122169

Abstract

A theoretical and experimental study including the combined convective and radiative heat transfer analysis of a flexible cylindrical type solar air - heater for circular and two elliptic shape with 0.55 and 0.65 m major axis are presented. The solar collector is manufactured from LDPE films acting as a black absorber with a back insulation and double transparent covers sealed together along its edges. The collector is to be blown with a flow of pressurized air. A computer program is written for calculating the outlet temperature and collector thermal efficiency. Moreover the Nusselt number between the absorber and the heated air is determined experimentally in relation with the Reynolds number. Comparisons between the experimental data and the theoretical methods for the collector efficiency demonstrate a good agreement. In addition of this, the present experimental results of Nusselt number are correlated and compared with a correlation of another authors.

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