Solar-heat recovery assisted infrared dryer was designed and tested. Also, drying characteristics of melon slices were investigated. In this study, theoretical and experimental analysis of a new solar air collector with finned absorber were done determining the temperature distribution and efficiency of the solar air collector. Solar-heat recovery assisted infrared dryer is a new prototype. Energy demand can be reduced by adding solar collector and heat recovery unit to the infrared dryer. Taking into consideration the results of all analyses, the following remarks may be concluded: The results revealed that solar-infrared dryer has been shown good performance with the contribution of the solar energy and heat recovery. The drying efficiency of the system with and without the HR device at 50 °C was calculated average 33.4% and 22.6%, respectively. CFD analyses of the SAC and drying chamber have contributed to designation of system. Also, CFD simulations and experimental results are in good agreement. Experiment at 50 °C product surface temperature showed better qualities based on less shrinkage and color change. Proportional control of product surface temperature provided homogeneous and efficient drying.
As a result, the SAC and the HR unit were contributed to system efficiently. They have significantly reduced the energy demand without any negative effects on the quality of product. The IR + convective drying method can be used instead of using the IR method alone. The results presented in this study not only show the good performance of the SHRAIRD, but also provide important guidance to designers. This drying system can be applied successfully in drying applications.