Enhanced Solar Air Heaters For Crop Drying 
Kamlesh Sahu1, Gyaneshwar Sanodiya2
1Kamlesh Sahu, Department of Mechanical Engineering, Bansal Institute of Science & Technology. Bhopal (M.P.), India.
2Gyaneshwar Sanodiya, Department of Mechanical Engineering, Lakshmi Narain College of Technology Excellence (LNCTE) Bhopal (M.P.), India.
Manuscript received on 07 September 2021 | Revised Manuscript received on 10 September 2021 | Manuscript Accepted on 15 November 2021 | Manuscript published on 30 November 2021 | PP: 1-5 | Volume-1 Issue-2 November 2021 | Retrieval Number:100.1/ijae.B1506111221 | DOI: 10.54105/ijae.B1506.111221
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Abstract: Solar air heaters are placed on farms to provide heat for the drying of grain and crop harvesting and harvesting. The results of the thermal study showed that solar air heaters are capable of providing a sufficient increase in air temperature under the majority of crop drying circumstances studied. The restricted thermal capacity of air, as well as the low heat transfer coefficient between the absorber plate and the air flow via the ducting system, both contribute to the overall thermal efficiency of solar air heaters. Solar air heaters must be more efficient in order to be more affordable. This may be accomplished by increasing the heat transfer coefficient between the absorber plate and the air flow passing through the duct. More heat transfer coefficients can be increased by using either active or passive approaches. In most situations, it may be cost-effective to use solar air heaters and incorporate artificial roughness on the absorber plate. The rate of heat transmission from the solar air heater’s duct to the fluid flow may be increased by creating artificial roughness on the surface of the duct. The study focused on several roughness element geometries for solar air heater ducts, and the results indicated that there is a link between the two. This paper attempts to find ways to artificially increase the heat transfer capacity of solar air heaters’ ducts by using element geometries which have been utilised in solar air heaters’ heat transfer devices.
Keywords: Solar air heater, Crop drying, Solar energy, Heat transfer
Scope of the Article: Renewable Energy