The effect of a storage system on drying time and estimation of drying parameters of cocoa beans using an indirect solar dryer with a sensible heat energy storage system (stones which act as both absorber and heat storage media) is the main subject of this article. This dryer, which uses stones as storage material and is made of wood and plywood, was used to dry a quantity of 5 kg of fermented cocoa beans. The drying parameters for the drying curves and the drying efficiency of cocoa beans were established and studied. The drying curves were modelled from semi-empirical models. The results showed that the moisture of cocoa beans decreased from 60% to 7% in wet basis. With a solar collector and drying efficiency of 40% and 34%, respectively. And this with a maximum average difference temperature between the drying air and the ambient temperature of 13.25？C day or night. The best concordances are obtained with R2 values of 0.9983, 0.9843, 0.9813 and 0.9837 respectively from the models of Hii, Jena and Das, Demir et al. and Alibas.
Dzelagha, B.F., Ngwa, N.M. and Nde Bup, D. (2020) A Review of Cocoa Drying Technologies and the Effect on Bean Quality Parameters. InternationalJournalofFoodScience, 2020, Article ID: 8830127. https://doi.org/10.1155/2020/8830127
[3]
Lasisi, D. (2014) A Comparative Study of Effects of Drying Methods on Quality of Cocoa Beans. International Journal of Engineering Research & Technology, 3, 991-996.
[4]
Misnawi, M. (2012) Effect of Cocoa Bean Drying Methods on Polycyclic Aromatic Hydrocarbons Contamination in Cocoa Butter. International Food Research Journal, 19, 1589-1594.
[5]
Dina, S.F., Ambarita, H., Napitupulu, F.H. and Kawai, H. (2015) Study on Effectiveness of Continuous Solar Dryer Integrated with Desiccant Thermal Storage for Drying Cocoa Beans. CaseStudiesinThermalEngineering, 5, 32-40. https://doi.org/10.1016/j.csite.2014.11.003
[6]
CAC/RCP (2013) Code of Practice for the Prevention and Reduction of Ochratoxin A (OTA) Contamination in Cocoa. FAO.
[7]
PHAMA (Pacific Horticultural and Agricultural Market Access) (2018) On-Farm Trials for Proven Cocoa Fermentation and Drying Method Department of Foreign Affairs and Trade. ABN: 46 000 691 690. No. 42444251. http://www.aecom.com
[8]
Kongor, J.E., Hinneh, M., de Walle, D.V., Afoakwa, E.O., Boeckx, P. and Dewettinck, K. (2016) Factors Influencing Quality Variation in Cocoa (Theobroma cacao) Bean Flavour Profile—A Review. FoodResearchInternational, 82, 44-52. https://doi.org/10.1016/j.foodres.2016.01.012
Koua, K.B., Magloire Koffi, E.P. and Gbaha, P. (2017) Séchage des fèves de cacao dans un séchoir solaire indirect à circulation forcée d’air. Sciences Appliquées et de l’Ingénieur, 2, 15-19.
[11]
Kuma, Y.I. (2012) Application of MATLAB—Based Solar Dryer for Cocoa Drying. International Conference on Applied Computer and Applied Computer Science 2012, San Francisco, 24-26 October 2012, 252-258.
[12]
Manoj, M. and Manivannan, A. (2013) Simulation of Solar Dryer Utilizing Green House Effect for Cocoa Bean Drying. International Journal of Advanced Engineering Technology, 4, 24.
[13]
Oke, D.O. and Omotayo, K.F. (2012) Effect of Forced-Air Artificial Intermittent Drying on Cocoa Beans in South-Western Nigeria. Journal of Cereals and Oil Seeds, 3, 1-5.
[14]
Nganhou, J., Njomo, D., Bénet, J.C., Augier, F. and Berthomieu, G. (2002) Perfecting a Method of Micro-Analysis of Water and Acetic Acid in a Cocoa Bean in the Course of Drying: Applying to Determine Transportation Coefficients. Heat and Mass Transfer, 39, 797-803. https://doi.org/10.1007/s00231-002-0395-7
[15]
Wan Daud, W.R., Mcor Talib, M.Z. and Hakimi lbrahim, M. (1996) Characteristic Drying Curves of Cocoa Beans. DryingTechnology, 14, 2387-2396. https://doi.org/10.1080/07373939608917211
[16]
Burguillos, J.D., Elauria, J.C. and De Vera, I. (2017) Design. Construction and Performance Evaluation of an Indirect Solar Dryer for Fermented Cacao Beans. Philippine Journal for Applied Research and Development, 7, 1-11.
[17]
Hii, C.L., Law, C.L., Cloke, M. and Suzannah, S. (2009) Thin Layer Drying Kinetics of Cocoa and Dried Product Quality. BiosystemsEngineering, 102, 153-161. https://doi.org/10.1016/j.biosystemseng.2008.10.007
[18]
Arinze, E.A., Schoenau, G.J. and Sokhansanj, S. (1999) Design and Experimental Evaluation of a Solar Dryer for Commercial High-Quality Hay Production. Renewable Energy, 16, 639-642. https://doi.org/10.1016/s0960-1481(98)00242-0
[19]
Chaouch, W.B., Khellaf, A., Mediani, A., Slimani, M.E.A., Loumani, A. and Hamid, A. (2018) Experimental Investigation of an Active Direct and Indirect Solar Dryer with Sensible Heat Storage for Camel Meat Drying in Saharan Environment. SolarEnergy, 174, 328-341. https://doi.org/10.1016/j.solener.2018.09.037
[20]
Vijayan, S., Arjunan, T.V. and Kumar, A. (2016) Mathematical Modeling and Performance Analysis of Thin Layer Drying of Bitter Gourd in Sensible Storage Based Indirect Solar Dryer. InnovativeFoodScience&EmergingTechnologies, 36, 59-67. https://doi.org/10.1016/j.ifset.2016.05.014
[21]
Kamble, A.K., Pardeshi, I.L., Singh, P.L. and Ade, G.S. (2013) Drying of Chilli Using Solar Cabinet Dryer Coupled with Gravel Bed Heat Storage System. Journal of Food Technology Research, 1, 87-94.
[22]
Nabnean, S., Janjai, S., Thepa, S., Sudaprasert, K., Songprakorp, R. and Bala, B.K. (2016) Experimental Performance of a New Design of Solar Dryer for Drying Osmotically Dehydrated Cherry Tomatoes. Renewable Energy, 94, 147-156. https://doi.org/10.1016/j.renene.2016.03.013
[23]
Amer, B.M.A., Hossain, M.A. and Gottschalk, K. (2010) Design and Performance Evaluation of a New Hybrid Solar Dryer for Banana. EnergyConversionandManagement, 51, 813-820. https://doi.org/10.1016/j.enconman.2009.11.016
[24]
Reyes, A., Mahn, A., Cubillos, F. and Huenulaf, P. (2013) Mushroom Dehydration in a Hybrid-Solar Dryer. EnergyConversionandManagement, 70, 31-39. https://doi.org/10.1016/j.enconman.2013.01.032
[25]
Shalaby, S.M. and Bek, M.A. (2014) Experimental Investigation of a Novel Indirect Solar Dryer Implementing PCM as Energy Storage Medium. EnergyConversionandManagement, 83, 1-8. https://doi.org/10.1016/j.enconman.2014.03.043
[26]
Dina, S.F., Ambarita, H., Napitupulu, F.H. and Kawai, H. (2015) Study on Effectiveness of Continuous Solar Dryer Integrated with Desiccant Thermal Storage for Drying Cocoa Beans. CaseStudiesinThermalEngineering, 5, 32-40. https://doi.org/10.1016/j.csite.2014.11.003
[27]
Fagunwa, A.O., Koya, O.A. and Faborode, M.O. (2009) Development of an Intermittent Solar Dryer for Cocoa Beans. AgriculturalEngineeringInternational, XI.
[28]
Mohanraj, M. and Chandrasekar, P. (2008) Drying of Copra in a Forced Convection Solar Drier. BiosystemsEngineering, 99, 604-607. https://doi.org/10.1016/j.biosystemseng.2007.12.004
[29]
Koffi, E.P., Gbaha, P., Sako, M.K., N’guessan, Y., Sangare, M.K., Konan, M.K., et al. (2008) Experimental Thermal Performance Study on a Thermosyphon Solar Water Heater, with an Internal Exchanger, in Cote D’Ivoire. GlobalJournalofPureandAppliedSciences, 13, 557-561. https://doi.org/10.4314/gjpas.v13i4.16757
[30]
Okello, D., Foong, C.W., Nydal, O.J. and Banda, E.J.K. (2014) An Experimental Investigation on the Combined Use of Phase Change Material and Rock Particles for High Temperature (∼350°C) Heat Storage. EnergyConversionandManagement, 79, 1-8. https://doi.org/10.1016/j.enconman.2013.11.039
[31]
Lamnatou, C., Papanicolaou, E., Belessiotis, V. and Kyriakis, N. (2012) Experimental Investigation and Thermodynamic Performance Analysis of a Solar Dryer Using an Evacuated-Tube Air Collector. AppliedEnergy, 94, 232-243. https://doi.org/10.1016/j.apenergy.2012.01.025
[32]
Jain, D. (2005) Modeling the System Performance of Multi-Tray Crop Drying Using an Inclined Multi-Pass Solar Air Heater with In-Built Thermal Storage. JournalofFoodEngineering, 71, 44-54. https://doi.org/10.1016/j.jfoodeng.2004.10.016
[33]
Duffie, J.A. and Beckman, W.A. (1991) Solar Engineering of Thermal Processes. 2nd Edition, John Wiley and Sons.
[34]
Lakshmi, D.V.N., Muthukumar, P. and Nayak, P.K. (2021) Experimental Investigations on Active Solar Dryers Integrated with Thermal Storage for Drying of Black Pepper. RenewableEnergy, 167, 728-739. https://doi.org/10.1016/j.renene.2020.11.144
[35]
Dissa, A.O., Desmorieux, H., Bathiebo, J. and Koulidiati, J. (2011) A Comparative Study of Direct and Indirect Solar Drying of Mango. Global Journal of Pure and Applied Sciences, 17, 273-294.
[36]
El-Sebaii, A.A., Aboul-Enein, S., Ramadan, M.R.I. and El-Gohary, H.G. (2002) Experimental Investigation of an Indirect Type Natural Convection Solar Dryer. EnergyConversionandManagement, 43, 2251-2266. https://doi.org/10.1016/s0196-8904(01)00152-2
[37]
El-Sebaii, A.A. and Shalaby, S.M. (2013) Experimental Investigation of an Indirect-Mode Forced Convection Solar Dryer for Drying Thymus and Mint. EnergyConversionandManagement, 74, 109-116. https://doi.org/10.1016/j.enconman.2013.05.006
[38]
Akpinar, E.K. (2010) Drying of Mint Leaves in a Solar Dryer and under Open Sun: Modelling, Performance Analyses. EnergyConversionandManagement, 51, 2407-2418. https://doi.org/10.1016/j.enconman.2010.05.005
[39]
Usub, T., Lertsatitthankorn, C., Poomsa-ad, N., Wiset, L., Siriamornpun, S. and Soponronnarit, S. (2010) Thin Layer Solar Drying Characteristics of Silkworm Pupae. FoodandBioproductsProcessing, 88, 149-160. https://doi.org/10.1016/j.fbp.2009.04.002
[40]
Mahmutoğlu, T., Emír, F. and Saygi, Y.B. (1996) Sun/Solar Drying of Differently Treated Grapes and Storage Stability of Dried Grapes. JournalofFoodEngineering, 29, 289-300. https://doi.org/10.1016/0260-8774(96)00006-4
[41]
Diamante, L.M. and Munro, P.A. (1993) Mathematical Modelling of the Thin Layer Solar Drying of Sweet Potato Slices. SolarEnergy, 51, 271-276. https://doi.org/10.1016/0038-092x(93)90122-5
[42]
Chaouch, W.B., Khellaf, A., Mediani, A., Slimani, M.E.A., Loumani, A. and Hamid, A. (2018) Experimental Investigation of an Active Direct and Indirect Solar Dryer with Sensible Heat Storage for Camel Meat Drying in Saharan Environment. SolarEnergy, 174, 328-341. https://doi.org/10.1016/j.solener.2018.09.037
[43]
Yaldiz, O., Ertekin, C. and Uzun, H.I. (2001) Mathematical Modeling of Thin Layer Solar Drying of Sultana Grapes. Energy, 26, 457-465. https://doi.org/10.1016/s0360-5442(01)00018-4
[44]
Akpinar, E., Midilli, A. and Bicer, Y. (2003) Single Layer Drying Behaviour of Potato Slices in a Convective Cyclone Dryer and Mathematical Modeling. EnergyConversionandManagement, 44, 1689-1705. https://doi.org/10.1016/s0196-8904(02)00171-1
[45]
Jinap, S., Thien, J. and Yap, T.N. (1994) Effect of Drying on Acidity and Volatile Fatty Acids Content of Cocoa Beans. JournaloftheScienceofFoodandAgriculture, 65, 67-75. https://doi.org/10.1002/jsfa.2740650111
