Evaluation of Infrared Radiation Combined with Hot Air Convection for Energy-Efficient Drying of Biomass

Hany S. EL-Mesery, Abd El-Fatah Abomohra, Chan-Ung Kang, Ji-Kwang Cheon, Bikram Basak and Byong-Hun Jeon
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Hany S. EL-Mesery: School of Energy and Power Engineering, Jiangsu University, Zhenjiang 212013, China
Abd El-Fatah Abomohra: New Energy Department, School of Energy and Power Engineering, Jiangsu University, Zhenjiang 212013, China
Chan-Ung Kang: Department of Earth Resources and Environmental Engineering, Hanyang University, Seoul 04763, Korea
Ji-Kwang Cheon: Department of Earth Resources and Environmental Engineering, Hanyang University, Seoul 04763, Korea
Bikram Basak: Department of Earth Resources and Environmental Engineering, Hanyang University, Seoul 04763, Korea
Byong-Hun Jeon: Department of Earth Resources and Environmental Engineering, Hanyang University, Seoul 04763, Korea

Energies, 2019, vol. 12, issue 14, 1-15

Abstract: Cost-effective biomass drying is a key challenge for energy recovery from biomass by direct combustion, gasification, and pyrolysis. The aim of the present study was to optimize the process of biomass drying using hot air convection (HA), infrared (IR), and combined drying systems (IR-HA). The specific energy consumption (SEC) decreased significantly by increasing the drying temperature using convective drying, but higher air velocities increased the SEC. Similarly, increasing air velocity in the infrared dryer resulted in a significant increase in SEC. The lowest SEC was recorded at 7.8 MJ/kg at an air velocity of 0.5 m/s and an IR intensity of 0.30 W/cm 2 , while a maximum SEC (20.7 MJ/kg) was observed at 1.0 m/s and 0.15 W/cm 2 . However, a significant reduction in the SEC was noticed in the combined drying system. A minimum SEC of 3.8 MJ/kg was recorded using the combined infrared-hot air convection (IR-HA) drying system, which was 91.7% and 51.7% lower than convective and IR dryers, respectively. The present study suggested a combination of IR and hot air convection at 60 °C, 0.3 W/cm 2 and 0.5 m/s as optimum conditions for efficient drying of biomass with a high water content.

Keywords: biomass drying; convection hot-air; infrared; specific energy consumption; drying time (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2019
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (5)

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