Thermal performance of drying mango slices using a baffled-type hybrid solar dryer with exhaust hot air recirculation

Abstract

In this research, a hybrid solar dryer has been designed for day and night operation through forced convection for drying mango slices and preparation of bread toast. As studied from the literature, enough research is not done on the use of recirculation of exhaust hot air and baffle in a solar dryer. The thermal and economic performance of the dryer has been assessed by calculating collector efficiency, drying efficiency, drying rate, payback period and cost-benefit ratio. It is found that the maximum collector efficiency is 74.1% and 66.96% with and without the use of exhaust hot air recirculation. Performance parameters such as drying rate (0.95 kg/hr), drying efficiency (32.89%), payback period (1.4394 years), and cost-benefit ratio (2.08) have been evaluated. An effective drying effect is produced by using an electric coil for night operation of dryer. An increase in the solar radiation increases the temperature of air inside the collector, thereby increasing the collector efficiency, drying efficiency and drying rate. The coefficient of determination for outlet collector temperature during consecutive three days is estimated above 95%, thus signifying a higher order of fit. Performing an uncertainty analysis of measurement, the uncertainty error is calculated below 10% exhibiting a reliable experimental result. Solar drying is considered as a sustainable food preservation method without negatively impacting the environment and finds wide applications in the fruit and food processing industries, domestic purposes etc.

Keywords

• Solar Drying
• Forced Convection
• Development of Hybrid Solar Dryer
• Experimental Investigation
• Performance Analysis
• Uncertainty Analysis

References

1. REFERENCES
2. [1] Şirin C, Selimefendigil F, .ztop HF. Performance analysis and identification of an indirect photovoltaic thermal dryer with aluminum oxide nano-embedded thermal energy storage modification. Sustainability 2023;15:2422. [CrossRef]
3. [2] Veeramanipriya E, Sundari AU. Performance evaluation of hybrid photovoltaic thermal (PVT) solar dryer for drying of cassava. Solar Energy 2021;215:240–51. [CrossRef]
4. [3] Singh P, Gaur MK. Environmental and economic analysis of novel hybrid active greenhouse solar dryer with evacuated tube solar collector. Sustainable Energy Technol Assess 2021;47:101428. [CrossRef]
5. [4] Singh P, Gaur MK. Heat transfer analysis of hybrid active greenhouse solar dryer attached with evacuated tube solar collector. Solar Energy 2021;224:1178–92. [CrossRef]
6. [5] Nwakuba NR, Ndukwu MC, Asonye GU, Asoegwu SN, Nwandikom GI. Environmental sustainability analysis of a hybrid heat source dryer. Polytechnica 2020;3:99–114. [CrossRef]
7. [6] Suherman S, Hadiyanto H, Susanto EE, Utami IAP, Ningrum T. Hybrid solar dryer for sugar-palm vermicelli drying. J Food Process Eng 2020;43:e13471. [CrossRef]
8. [7] Srithanyakorn S, Bunchan S, Krittacom B, Luampon R. Comparison of mixed-mode forced-convection solar dryer with and without stainless wire mesh in solar collector. Clean Energy 2023;7:1316–29. [CrossRef]

9. [8] Deef M, Samy Helal H, El-Sebaee I, Nadimi M, Paliwal J, Ibrahim A. Harnessing solar energy: A novel hybrid solar dryer for efficient fish waste processing. AgriEngineering 2023;5:2439–57. [CrossRef]
10. [9] Salve S, Fulambarkar AM. Experimental studies on drying characteristics of green chilies in a solar dryer. J Therm Eng 2022;8:587–94. [CrossRef]
11. [10] Srimanickam B, Kumar S. Drying investigation of coriander seeds in a photovoltaic thermal collector with solar dryer. Int J Mech Eng Technol 2021;14:659–68. [CrossRef]
12. [11] Shrivastava A, Gaur MK, Singh P. Mango leather (Aam Papad) drying in hybrid greenhouse solar dryer with evacuated tube collector and finned drying tray: Drying behavior and economic analysis. Energy Sources Part A Recover Util Environ Eff 2025;47:2029974. [CrossRef]
13. [12] Behera DD, Mohanty RC, Mohanty AM. Experimental investigation of a hybrid solar dryer for vegetable drying with and without phase change material. J Braz Soc Mech Sci Eng 2024;46:303. [CrossRef]
14. [13] Heydari A, Forati M, Khatam S. Thermal performance investigation of a hybrid solar air heater applied in a solar dryer using thermodynamic modeling. J Therm Eng 2021;7:715–30. [CrossRef]
15. [14] Awasthi A, Kallioğlu MA, Sharma A, Mohan A, Chauhan R, Singh T. Solar collector tilt angle optimization for solar power plant setup-able sites at Western Himalaya and correlation formulation. J Therm Anal Calorim 2022;147:11417–31. [CrossRef]
16. [15] Padhi MR, Ghose P. Performance prediction of a model rotary air preheater through porous media approach. J Therm Sci Eng Appl 2023;15:071008. [CrossRef]
17. [16] Behera DD, Mohanty RC, Mohanty AM. Thermal performance of a hybrid solar dryer through experimental and CFD investigation. J Food Process Eng 2023;46:e14386. [CrossRef]
18. [17] Behera DD, Mohanty RC, Mohanty AM. Performance evaluation of indirect type forced convection solar mango dryer: A sustainable way of food preservation. Therm Sci 2023;27:1659–72. [CrossRef]
19. [18] Ampah J, Dzisi KA, Addo A, Bart-Plange A. Drying kinetics and chemical properties of mango. Int J Food Sci 2022;2022:6243228. [CrossRef]
20. [19] Hao W, Liu S, Mi B, Lai Y. Mathematical modeling and performance analysis of a new hybrid solar dryer of lemon slices for controlling drying temperature. Energies 2020;13:350. [CrossRef]
21. [20] Asnaz MSK, Dolcek AO. Comparative performance study of different types of solar dryers towards sustainable agriculture. Energy Rep 2021;7:6107–18. [CrossRef]
22. [21] Wang W, Li M, Hassanien RHE, Wang Y, Yang L. Thermal performance of indirect forced convection solar dryer and kinetics analysis of mango. Appl Therm Eng 2018;134:310–21. [CrossRef]
23. [22] Mugi VR, Chandramohan VP. Comparison of drying kinetics, thermal and performance parameters during drying guava slices in natural and forced convection indirect solar dryers. Solar Energy 2022;234:319–29. [CrossRef]
24. [23] Gilago MC, Chandramohan VP. Performance evaluation of natural and forced convection indirect type solar dryers during drying ivy gourd: An experimental study. Renew Energy 2022;182:934–45. [CrossRef]