Volume 32, No. 04, Month OCTOBER, Year 2022, Pages 830 - 842

Application of wire mesh stainless porous material for reduce energy consumption in the convective drying of lingzhi mushroom

Kompet Inla, Bundit Krittacom, Pathiwat Waramit, Ratinun Luampon

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This research aimed to reduce energy consumption in the convective drying by applying the wire mesh stainless porous material. The wire mesh stainless porous materials were investigated with different sizes of 6, 8 and 12 PPI (pores per inch) and wire mesh layers (WL) of 4, 8 and 12 layers which installed inside the hot air duct at the inlet of drying chamber. The hot air flowed through these porous materials at a constant temperature of 70 ºC and a velocity of 2 m/s. In the experiment, the lingzhi mushroom sliced at a 3 mm thickness was used as a drying sample. The mass of lingzhi mushroom is recorded at 5 minute intervals during the drying process until reaching the final moisture content of 10 %w.b. Drying energy consumption was investigated with the specific energy consumption (SEC) and wet basis moisture content (Mw) was a parameter for investigating the drying behavior. Based on the experimental result, the drying time was in a range from 80–145 minutes. The porous materials installed inside the hot air duct of a dryer resulted in the rapid decrease of Mw while the drying time decreased with the increase of PPI and WL. The decreasing of Mw was affected by PPI more than that of WL. The lowest SEC of 3.70 MJ/kgwater was found at PPI=8 and WL=12 with the greatest reduction of SEC at 44.28% when comparing with the drying process without wire mesh stainless porous material.




Published by : King Mongkut's University of Technology North Bangkok
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