Experimental Study of a Solar Air Heater for Performance Enhancement using Solar Turbulator Fans

Karanth, Vasudeva K and Manjunath, M S and Madhwesh, N and Sharma, Yagnesh N (2017) Experimental Study of a Solar Air Heater for Performance Enhancement using Solar Turbulator Fans. In: International Conference On Contemporary issues in Science, Engineering and Management, 18/02/2017, GIFT, Bhubaneswar.

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Abstract

Solar air heating is a renewable energy heating technology used to heat or condition the air for buildings and for process heat applications. In this study, the aim is to improve the effectiveness of the air heater by introducing turbulator fans on the side walls of the air heater duct that are energized by solar energy.The turbulator fans introduce swirl motion around them which increase fluid mixing leading to enhanced heat transfer. It is found from the experimental analysis that with an increase in mass flow rate of air in the duct, air heater with turbulator fans shows improvement in the heat transfer capacity with significant improvement in temperature rise across the duct compared to that of the air heater without the turbulator fans. The results were also corroborated by the corresponding drop in absorber plate temperature for the corresponding increase in temperature rise across the air heater duct. However with an increase in mass flow rate corresponding to lower turbulator fan speeds, the air heater with turbulator fans shows a decrement in the heat transfer capacity as at lower speeds, the turbulator produces lower tip velocity compared to the main stream flow velocity, thereby acting as drag on the through flow. This reduces the heat transfer capability and results in lower temperature.

Item Type: Conference or Workshop Item (Paper)
Uncontrolled Keywords: Solar Air Heater, Turbulator Fan, Convective Heat Transfer, Performance Enhancement
Subjects: Engineering > MIT Manipal > Mechanical and Manufacturing
Depositing User: MIT Library
Date Deposited: 16 May 2017 08:42
Last Modified: 16 May 2017 08:42
URI: http://eprints.manipal.edu/id/eprint/148883

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