DESIGN, CONSTRUCTION AND EVALUATION OF A FAN SPEED CONTROLLER IN A FORCED CONVECTION SOLAR DRYER TO OPTIMIZE THE OVERALL ENERGY EFFICIENCY

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BAGHERI N.; KEYHANI A.; MOHTASEBI S.S.; ALIMARDANI R.; RAFIEE SH.; MANSOORI G.H.

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Journal: JOURNAL OF AGRICULTURAL SCIENCE AND TECHNOLOGY (JAST) Year:2011 | Volume:13 | Issue:4 Page(s): 503-515

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Title

DESIGN, CONSTRUCTION AND EVALUATION OF A FAN SPEED CONTROLLER IN A FORCED CONVECTION SOLAR DRYER TO OPTIMIZE THE OVERALL ENERGY EFFICIENCY

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Keywords

AUTOMATIC CONTROL SYSTEMQ3

FAN SPEEDQ3

FORCED-CONVECTIONQ3

OPTIMUM EFFICIENCYQ3

SOLAR DRYERQ3

Abstract

To increase agricultural crops’ quality and to minimize losses in the final product and used energy during the drying process, major drying system parameters should be continuously controlled. Precise control of such parameters is attained by using AUTOMATIC CONTROL SYSTEMs. To optimize the overall dryer efficiency in a forced convective SOLAR DRYER, a controller was designed, constructed and evaluated. The dryer FAN SPEED was chosen to be the controlled variable. Based upon the mathematical relations and a monitoring of the air inlet temperature to the collector, the air outlet temperature from the collector and the air outlet temperature from the drying chamber, the dryer efficiency was determined. Using the dryer control program the current and the optimized dryer efficiencies were calculated, compared and the FAN SPEED changed accordingly to maintain the optimized efficiency. Experiments were carried out in three replications (in three days) with the results showing that the system was capable of controlling the FAN SPEED to obtain the OPTIMUM EFFICIENCY. The dryer equipped with the designed control system worked with its highest efficiency throughout the day. Statistical analysis showed that the control system highly improved the dryer efficiency throughout its operation at a 1% probability level.

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APA: Copy

BAGHERI, N., KEYHANI, A., MOHTASEBI, S.S., ALIMARDANI, R., RAFIEE, SH., & MANSOORI, G.H.. (2011). DESIGN, CONSTRUCTION AND EVALUATION OF A FAN SPEED CONTROLLER IN A FORCED CONVECTION SOLAR DRYER TO OPTIMIZE THE OVERALL ENERGY EFFICIENCY. JOURNAL OF AGRICULTURAL SCIENCE AND TECHNOLOGY (JAST), 13(4), 503-515. SID. https://sid.ir/paper/62657/en

Vancouver: Copy

BAGHERI N., KEYHANI A., MOHTASEBI S.S., ALIMARDANI R., RAFIEE SH., MANSOORI G.H.. DESIGN, CONSTRUCTION AND EVALUATION OF A FAN SPEED CONTROLLER IN A FORCED CONVECTION SOLAR DRYER TO OPTIMIZE THE OVERALL ENERGY EFFICIENCY. JOURNAL OF AGRICULTURAL SCIENCE AND TECHNOLOGY (JAST)[Internet]. 2011;13(4):503-515. Available from: https://sid.ir/paper/62657/en

IEEE: Copy

N. BAGHERI, A. KEYHANI, S.S. MOHTASEBI, R. ALIMARDANI, SH. RAFIEE, and G.H. MANSOORI, “DESIGN, CONSTRUCTION AND EVALUATION OF A FAN SPEED CONTROLLER IN A FORCED CONVECTION SOLAR DRYER TO OPTIMIZE THE OVERALL ENERGY EFFICIENCY,” JOURNAL OF AGRICULTURAL SCIENCE AND TECHNOLOGY (JAST), vol. 13, no. 4, pp. 503–515, 2011, [Online]. Available: https://sid.ir/paper/62657/en

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