Total views : 209

Performance Studies of Sustainable Solar Dryer for Drying Agricultural Products

Affiliations

  • Department of Mechanical Engineering, RVCE, Bangalore - 560059, Karnataka, India

Abstract


A large portion of the world agricultural and food market is now dependent on dried fruits and vegetables. Drying of fruits is carried out using many methods, in this paper an approach is made using renewable source of energy to dry fruits and vegetables to reduce food wastage at the same time help the farmers. The solar dryer was fabricated using locally available materials like High quality wood, GI Collector sheet and Baffles etc. Performance studies were made on the solar dryer for different configurations with banana as drying product. Simulation results showed us the improvements in the drying characteristics when baffles were used inside the drying chamber. Through experiments it was evaluated that the efficiency of the solar dryer setup with baffles was 23.4% which was 8% more than efficiency of the solar dryer setup without baffles. The usage of artificial roughness beneath the collector plate and dehumidifier inside the drying chamber further increase the efficiency of the solar dryer system by 4%. It was also found that the drying time decreased by 32% when the solar dryer of configuration with baffles, Ribs and Dehumidifier was used.

Keywords

Artificial Roughness, Baffles, Drying Characteristic, Dehumidifier, Solar Dryer, Simulation.

Full Text:

 |  (PDF views: 229)

References


  • Postharvest Management of Fruit and Vegetables in the Asia-Pacific Region. Tokyo, Japan: Asian Productivity Organization; 2006.
  • Solar Radiant Energy over India. SEC-IMD Collaborative Project. Solar Energy Centre, Ministry of New and Renewable Energy. Government of India.
  • Mercer DG. Solar drying in developing countries: Possibilities and pitfalls. Chapter 4 from Using Food Science and Technology to Improve Nutrition and Promote National Development. In: Robertson GL, Lupine JR, (editors). 2008.
  • Ben Salma R. The air solar collectors: Comparative study, introduction of baffles to favour the heat transfer. Solar Energy 81. Tunisia: Institute Superior des Sciences Appliques et de Technologies; 2007. p. 139-49
  • Hassnain AA. Simple solar drying system for banana fruit. World Journal of Agricultural Sciences. 2009; 5(4):446-55.
  • Hegde VK. Design, fabrication, and performance evaluation of solar dryers. 2014 Mar. p. 15-28.
  • Saxena A, Patil NS. A thermodynamic review of solar heaters. Renewable and Sustainable Energy Reviews. 2015; 43:863-90.
  • Prasad BN, Saini JS. Optimal thermo hydraulic performance of artificially roughened solar air heaters. Solar Energy. 1991; 47(40):91–6.
  • Amer BMA, Hossain MA, Gottschalk K. Design and performance evaluation of a new hybrid solar dryer for banana. Energy Conversion and Management. 2010 Apr; 51:813-20.
  • Fudholi A, Martial A. Review of solar dryers for agricultural and marine products. Renewable and Sustainable Energy Reviews. 2010; 14:1-30
  • Garg HP. Solar energy: Fundamentals and applications. Tata McGraw-Hill Education; 2000.
  • Yeh HM, Ming G. Effect of collector aspect ratio on the collector efficiency of upward type baffled solar air heaters. Energy Conversion & Management. 2000; 41: 971–81.
  • Sawi AM. Application of folded sheet metal in flat bed solar air collectors. Applied Thermal Engineering. 2010; 30:864–71.
  • Yahya M. Experimental and theoretical performances of a solar assisted dehumidification drying system for heat sensitive products. Journal Momentum. 2013 Feb; 14(1):63-76.

Refbacks

  • There are currently no refbacks.


Creative Commons License
This work is licensed under a Creative Commons Attribution 3.0 License.