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Influencing Factors Used for Performance Evaluation of Solar Dryers

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  • QuanKun Zhu
  • Istvan Farkas
  • Janos Buzas

Abstract

Due to the rapid growth in human energy demand, research and development in renewable energy sources have become a top priority. Solar energy, as a renewable energy source, is widely used in the drying industry. This study examines the factors that influence the performance evaluation of solar dryers. The dryer consists of an air collector, a drying chamber, and a chimney. Experiments were conducted at the Solar Energy Laboratory of the Hungarian University of Agriculture and Life Sciences in Hungary (47.59° N, 19.36° E). The drying behaviour of single-pass and double-pass solar dryers was compared under the same environmental conditions. The analysis results indicate that the maximum solar radiation value is 950 W/m2 at 12:00. The maximum temperature difference between the top and bottom channels of the double-pass solar air collector is 9.5 °C. The average humidity in the environment, single-pass, and double-pass drying chambers is 31%, 26.5%, and 24%, respectively. The instantaneous efficiency of the single-pass solar collector reaches a peak of 56%, while the double-pass collector’s instantaneous efficiency peaks at around 60%. The collector performance curves show that the double-pass collector has a more stable performance.

Suggested Citation

  • QuanKun Zhu & Istvan Farkas & Janos Buzas, 2024. "Influencing Factors Used for Performance Evaluation of Solar Dryers," European Journal of Energy Research, European Open Science, vol. 4(3), pages 8-14, June.
    • Handle: RePEc:epw:energy:v:4:y:2024:i:3:id:7145
    DOI: 10.24018/ejenergy.2024.4.3.145
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    References listed on IDEAS

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    1. Bahrehmand, D. & Ameri, M. & Gholampour, M., 2015. "Energy and exergy analysis of different solar air collector systems with forced convection," Renewable Energy, Elsevier, vol. 83(C), pages 1119-1130.
    2. Bahrehmand, D. & Ameri, M., 2015. "Energy and exergy analysis of different solar air collector systems with natural convection," Renewable Energy, Elsevier, vol. 74(C), pages 357-368.
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    1. Maytham H. Machi & Istvan Farkas & János Buzás, 2025. "Modelling thePerformanceof DoublePassSolar Air Collectors," European Journal of Energy Research, European Open Science, vol. 5(1), pages 1-9, January.

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