• Barki. E Mechanical Engineering Department, Benue State Polytechnic, Ugbokolo. Benue State
  • Ukwenya J Mechanical Engineering Department, Benue State Polytechnic, Ugbokolo. Benue State
  • Idoko F Mechanical Engineering Department, Benue State Polytechnic, Ugbokolo. Benue State




Drying Process, Exergy, Heat Loss, Incinerator, Solar Collector, Solar Radiation


Solar dryer with backup incinerator was fabricated with the aim of improving the efficiency of the drying rate of selected agricultural products. The dryer consist of three main parts, the collector, the drying chamber and the incinerator. 1000g of chill pepper was sun dried and 1000g was charged into the dryer for the experiment. Drying using solar drying process was carried out during clear weather while incinerator drying process was carried out during cloudy weather and at nights The collector, dryer and incinerator energy efficiencies were determined and reported elsewhere. Exergy analysis of the dryer was carried out for both solar drying and incinerator drying using the experimental values. The average exergy inflow and outflow during solar drying was found to be 266.97 KJ/Kg and 20.85 KJ/Kg respectively. The average exergy loss at airflow velocity of 2.7 m/s was found to be 269.3 KJ/Kg for incinerator drying. The exergy efficiency of the incinerator fluctuates as it starts from 7.9, 11.1, 5.2, 13.5, 8.0 and 3.6 % for 8.00, 10.00, 12.00, 14.00, 16.00, 18.00 hrs respectively. The result also shows exergy efficiency of 83.1, 85.9, 91.7, 92.4, 89.0 and 73.4 % for 8.00, 10.00, 12.00, 14.00, 16.00, 18.00 hrs respectively during solar drying. The experimental and analytical temperatures values were observed to be solar radiation intensity dependants and are directly proportional with it. Although the heat losses are high for both drying processes, the dryer is suitable for drying agricultural produce during clear, cloudy weather and at nights.


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Okonkwo, W.I. and Okoye, E. C. Integrated pebbled Bed passive solar energy crop dryer, proceedings of 5th international conference and AGM of the Nigerian Institution of Agricultural Engineers, 26: .2004, 417 - 423.

Tanuj Kumar Sahu and Vishal Gupta, Experimental Analysis of Open sample and Modified Greenhouse Dryers for Drying Potato Flakes under Forced convection. International Journal of Engineering Research and Application. ISSN: 2248-9622, Vol. 6 Issue 7, 2016, 56-60

Mumba, J. (1995). Economic analysis of a photovoltaic, forced convection solar grain drier, Energy 20 (9), pp. 923–928.

Barki, E. Ibrahim, J. S and Andrew C. E. Performance Evaluation of an Efficient Solar Dryer with a Back up Incinerator for Grated Cassava under Makurdi Humid Climate. International Journal of Environment and Bioenergy 2012. 131-139.

Ibrahim, J. S. Edeoja, A. O. and Barki E. Comparative Performance Analysis of Solar Dryers with Backup Incinerators under Sub-tropical and Humid Climate Using Cassava Grates Jurnal Mekanikal,36,2013, 24-33,

Ibrahim, J. S, Eloka-Eboka A. C. and Barki, E. Comparative Analysis and Performance of Solar Dryers with Backup Incinerators forNsukka Sub-tropical and Makurdi Humid Locations Using Selected Farm Produce. British Journal of Applied Science & Technology 4(3): 2014, 525-539, DOI: https://doi.org/10.9734/BJAST/2014/4834

Ibrahim, J. S, Barki E and Edeoja, A. O. Drying of Chilli Pepper Using a Solar Dryer with a BackUp Incinerator under Makurdi Humid Climate American Journal of Engineering Research (AJER; e-ISSN: 2320-0847 p-ISSN : 2320-0936 Volume-4, Issue-10, 2015, 108-113,

Ikem, I. A. Aondover, I. H. Nyong, O. E. and Adie, A. J. Thermdynamic Analysis of a mixed mode solar dryer International Journal of Engineering and Technology (IJET) 8 (10), 2016, p-ISSN : 2319-8613

Lyes B. An Overview on Application of Exergy and Energy for Determination of Solar Drying Efficiency. International Journal of Energy Engineering, 2(5); 2012, 184-194 DOI: https://doi.org/10.5923/j.ijee.20120205.01

Deepika, C and Sanjay, A. Energy and Exergy Based Analysis of Hybrid Solar Dryer. International Electrical Engineering journal. 7,(8),2016, pp 2347-2358 ISSN 2078-2365.

Elavarasan, R., Dhanushkodi, S.and Sudhakar, K. (2018). Energy and Exergy Analysis of Natural Convection Solar Dryer. International Journal of Mechanical Engineering and Technology (IJMET) Volume 9, Issue 6, June 2018, pp. 769–775,




How to Cite

Barki. E, Ukwenya J, & Idoko F. (2019). EXERGY ANALYSIS OF SOLAR DRYER WITH A BACKUP INCINERATOR . International Journal of Engineering Technologies and Management Research, 6(8), 12–20. https://doi.org/10.29121/ijetmr.v6.i8.2019.436