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Energy and quality analysis of forced convection air-energy assisted solar timber drying

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Listed:
  • Chi, Xiang
  • Tang, Sai
  • Song, Xiaoxue
  • Rahimi, Sohrab
  • Ren, Zechun
  • Han, Guangping
  • Shi, Sheldon Q.
  • Cheng, Wanli
  • Avramidis, Stavros

Abstract

Discontinuities due to weather conditions and daylight affect solar drying, so to address that, a working mechanism of air energy-assisted solar drying was developed in this study. An air-energy assisted solar dryer was used to dry timber, from a green average moisture content of 183%–11.3% in 161.5 h, where the moisture diffusion coefficient ranged from 1.28 ×10-10 m2/s to 6.41 ×10-9 m2/s. The effective solar radiation intensity during drying ranged from 221.3 to 750.3 W/m2. The overall drying efficiency was 30.7%, and the effective solar heat supply ratio was 58.5%. The specific moisture extraction rate and specific energy consumption were measured within a range of 0.32–3.0 kg/kWh and 924 - 11390 kJ/kg, respectively. The average power consumption per m3 of wood volume was 254.2 kW h/m3. The results showed that the energy-assisted solar dryer was suitable for a condition with low radiation and various weather conditions.

Suggested Citation

  • Chi, Xiang & Tang, Sai & Song, Xiaoxue & Rahimi, Sohrab & Ren, Zechun & Han, Guangping & Shi, Sheldon Q. & Cheng, Wanli & Avramidis, Stavros, 2023. "Energy and quality analysis of forced convection air-energy assisted solar timber drying," Energy, Elsevier, vol. 283(C).
    • Handle: RePEc:eee:energy:v:283:y:2023:i:c:s0360544223021126
    DOI: 10.1016/j.energy.2023.128718
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