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<p>Solar thermal technology holds significant potential for widespread utilization in the drying of agricultural and industrial commodities, effectively addressing challenges related to storage and transportation. This research seeks to evaluate the thermo-electrical performance of a forced-air convection-based PVT air-collector for drying tomatoes. Simulations were conducted in Ghaziabad City, India, considering local atmospheric conditions viz. solar irradiance intensity, ambient temperature, and the relative humidity of four different days from 7th–10th August 2023. The proposed dryer system comprises a PVT air-collector designed to provide both thermal and enhanced electrical energy, alongside a drying chamber, heat recovery system, and DC fan. Results indicate average thermal, electrical, and overall efficiencies of 36.04%, 12.09%, and 48.83%, respectively, for the PVT air-collector based solar dryer. Over a 20-h drying period, tomato moisture content decreases from 78% to 8.5%. Moreover, as air velocity rises from 0.5&#xa0;m/s to 2&#xa0;m/s, the average moisture content decreases from 22.55% to 16.693%, indicating accelerated moisture elimination at higher air velocities. The innovative dryer demonstrates its potential for reducing energy consumption and subsequent CO<sub>2</sub> emissions in the food processing sector.</p>

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Performance Analysis and Environmental Evaluation of a Photovoltaic Thermal (PVT) Air Collector Solar Dryer

  • 期刊论文

  • 发表日期：

    2025年4月5日

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  • Trapti Varshney,
  • Sanjay Agrawal,
  • Jitendra Kumar,
  • Satish Kumar

摘要

Solar thermal technology holds significant potential for widespread utilization in the drying of agricultural and industrial commodities, effectively addressing challenges related to storage and transportation. This research seeks to evaluate the thermo-electrical performance of a forced-air convection-based PVT air-collector for drying tomatoes. Simulations were conducted in Ghaziabad City, India, considering local atmospheric conditions viz. solar irradiance intensity, ambient temperature, and the relative humidity of four different days from 7th–10th August 2023. The proposed dryer system comprises a PVT air-collector designed to provide both thermal and enhanced electrical energy, alongside a drying chamber, heat recovery system, and DC fan. Results indicate average thermal, electrical, and overall efficiencies of 36.04%, 12.09%, and 48.83%, respectively, for the PVT air-collector based solar dryer. Over a 20-h drying period, tomato moisture content decreases from 78% to 8.5%. Moreover, as air velocity rises from 0.5 m/s to 2 m/s, the average moisture content decreases from 22.55% to 16.693%, indicating accelerated moisture elimination at higher air velocities. The innovative dryer demonstrates its potential for reducing energy consumption and subsequent CO2 emissions in the food processing sector.