DOI: https://doi.org/10.14710/ijred.9.1.131-139

Energy Analysis of a Hybrid Solar Dryer for Drying Coffee Beans

Department of Chemical Engineering, Faculty of Engineering, Diponegoro University, Jl. Prof. Soedarto, Tembalang, Semarang, Jawa Tengah 50275, Indonesia

Received: 16 Oct 2019; Revised: 15 Jan 2020; Accepted: 10 Feb 2020; Available online: 15 Feb 2020; Published: 18 Feb 2020.
Editor(s): H Hadiyanto
Open Access Copyright (c) 2020 The Authors. Published by Centre of Biomass and Renewable Energy (CBIORE)
Creative Commons License This work is licensed under a Creative Commons Attribution-ShareAlike 4.0 International License.

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Abstract
In this study, hybrid solar drying of coffee beans was performed, and energy analysis was carried out, to assess the system’s performance, in terms of energy efficiency, compared to solar drying and the open sun drying method. The dryer has three compartments: solar collector for collecting solar radiation, drying chamber, and a Liquid Petroleum Gas burner, which acted as an auxiliary heater to assist the thermal energy. The drying chamber has four trays for placing the dried product. The initial moisture content of coffee beans was 54.23% w.b and was reduced to the final moisture content between 11-12% w.b. The coffee beans dried faster when subjected to the solar hybrid drying method, compared to other methods, with the dryer temperature of 40°C, 50°C, and 60°C. Results indicated that the coffee beans’ drying times varied from 10 to 14 hours. However, at temperature 50°C and 60°C for the 1st tray, the water content was reduced more rapidly compared to the other tray. From the results of this study, we can see the different efficiency of solar collector that shows of 54.15% at variable temperature 60°C for drying time 12:00 to 14:00 p.m for hybrid solar drying and for the solar drying process is 50.07% at the range of drying time 12:00 to 14:00 p.m. Mathematical modelling shows that Page model is the most suitable for describing the coffee beans’ drying behaviour using a hybrid solar dryer. The effective diffusivity values found in this experiment are all in the acceptable range for most agricultural products. ©2020. CBIORE-IJRED. All rights reserved
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Keywords: Solar Drying; Hybrid Solar Dryer; Coffee Beans; Energy Analysis; Mathematical Modeling;

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Section: Int. Conf. of Chemical Process and Product Engineering 2019
Language : EN
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  1. Agustina, R., Syah, H., & Moulana, R. (2016) Characteristic Drying of Coffee Beans Using a Dryer with the Heat Source of Coffe Husk Furnace and Solar Collectors. Jurnal Ilmiah Teknologi Pertanian AGROTECHNO, 1, 20–27
  2. Aissa, W., El-Sallak, M. & Elhakem, A. (2014) Performance of solar dryer chamber used for convective drying of sponge-cotton. Thermal Science. 18, 451–462. DOI: 10.2298/TSCI110710084A
  3. Alara, O., Abdurahman, N., & Olalere, O. (2019) Mathematical modelling and morphological properties of thin layer oven drying of Vernonia amygdalina leaves. Journal of the Saudi Society of Agricultural Sciences, 18(3), 309–315. https://doi.org/10.1016/j.jssas.2017.09.003
  4. Aviara, N.A. and Igbeka, J.C. (2016) Modeling for Drying of Thin Layer of Native Cassava Starch in Tray Dryer. Journal of Biosystems Engineering, 41(4), 342–356. https://doi.org/10.5307/JBE.2016.41.4.342
  5. Ayadi, M., Ben Mabrouk, S., Zouari, I., & Bellagi, A. (2014) Kinetic study of the convective drying of spearmint. Journal of the Saudi Society of Agricultural Sciences, 13(1), 1–7. https://doi.org/10.1016/j.jssas.2013.04.004
  6. Ayensu, A. (1997) Dehydration of food crops using a solar dryer with convective heat flow. Solar Energy, 59, 121–126. https://doi.org/10.1016/S0038-092X(96)00130-2
  7. Bennamoun, L. (2012) An Overview on Application of Exergy and Energy for Determination of Solar Drying Efficiency. International Journal of Energy Engineering, 2, 184–194. doi: 10.5923/j.ijee.20120205.01
  8. Beristain, C.I., Diaz, R., Azuara, E., & Garcia, H.S. (1994) Thermodynamic behavior of green whole and decaffeinated coffee beans during adsorption. Drying Technology, 12, 1221–1233. https://doi.org/10.1080/07373939408960997
  9. Charmongkolpradit, S. and Luampon, R. (2017) Study of Thin Layer Drying Model for Cassava Pulp. Energy Procedia, 138, 354–359. https://doi.org/10.1016/j.egypro.2017.10.138
  10. Dairo, O. U., Aderinlewo, A.A., Adeosun, O.J., Ola, I.A., & Salaudeen, T. (2015) Solar Drying Kinetics of Cass Ava Slices in a Mixed Flow Dryer. Acta Technologica Agriculturae, 18(4), 102–107. DOI: 10.1515/ata-2015-0020
  11. Deeto, S., Thepa, S., Monyakul, V., & Songprakorp, R. (2018) The experimental new hybrid solar dryer and hot water storage system of thin layer coffee bean dehumidification. Renewable Energy, 115, 954–968. https://doi.org/10.1016/j.renene.2017.09.009
  12. Dhanushkodi, S., Wilson, V.H., & Sudhakar, K. (2017) Mathematical modeling of drying behavior of cashew in a solar biomass hybrid dryer. Resource-Efficient Technologies, 3(4), 359–364. https://doi.org/10.1016/j.reffit.2016.12.002
  13. Dong, W., Hu, R., Chu, Z., Zhao, J., & Tan, L. (2017) Effect of different drying techniques on bioactive components, fatty acid composition, and volatile profile of robusta coffee beans. Food Chemistry, 234, 121–130. https://doi.org/10.1016/j.foodchem.2017.04.156
  14. Dong, W., Hu, R., Long, Y., Li, H., Zhang, Y., Zhu, K., & Chu, Z. (2019) Comparative evaluation of the volatile profiles and taste properties of roasted coffee beans as affected by drying method and detected by electronic nose, electronic tongue, and HS-SPME-GC-MS. Food Chemistry, 272, 723–731. https://doi.org/10.1016/j.foodchem.2018.08.068
  15. El-Beltagy, A., Gamea, G.R., & Amer Essa, A.A. (2007) Solar drying characteristics of strawberry. Journal of Food Engineering, 78(2), 456–464. https://doi.org/10.1016/j.jfoodeng.2005.10.015
  16. Ertekin, C. and Firat, M.Z. (2015) A comprehensive review of thin-layer drying models used in agricultural products. Critical Reviews in Food Science and Nutrition, 57(4), 701–717. https://doi.org/10.1080/10408398.2014.910493
  17. Gan, P.L. and Poh, P.E. (2014) Investigation on the effect of shapes on the drying kinetics and sensory evaluation study of dried jackfruit. International Journal of Engineering Science, 7, 193–198. DOI: 10.12777/ijse.7.2.193-198
  18. Greenberg, J., Boozer, C., & Geliebter, A. (2006). Coffee, diabetes, and weight control. The American journal of clinical nutrition. 84. 682-693
  19. Hanif, M., Khattak, M.K., Ur-Rahman, M., Khan, M.A. & Ramzan, M. (2014) Performance evaluation of a flat plate solar collector as a drier for chillies and tomatoes. Science, Technology, and Development, 33, 63–67
  20. Harun, D., Maulana, M.I., Hasan, A. & Husaini (2016). Experimental investigation on open sun-drying and solar drying system of bilimbi. 2016 6th International Annual Engineering Seminar (InAES), 271-275. DOI: 10.1109/INAES.2016.7821947
  21. Hashim, N., Daniel, O., & Rahaman, E. (2014) A Preliminary Study: Kinetic Model of Drying Process of Pumpkins (Cucurbita Moschata) in a Convective Hot Air Dryer. Agriculture and Agricultural Science Procedia, 2, 345–352. https://doi.org/10.1016/j.aaspro.2014.11.048
  22. Indonesia Standardization Body (2004) SNI 01-3542-2004, Kopi Bubuk. 1–10
  23. International Coffee Organization (2018) Monthly Coffee Market Report - December 2018
  24. Kassem, A.E.W.S., Al-Sulaiman, M.A., Aboukarima, A.E.W.M. & Kassem, S.S. (2011) Predicting drying efficiency during solar drying process of grapes clusters in a box dryer using artificial neural network. Australian Journal of Basic and Applied Sciences, 5, 230–241
  25. Kaur K. and Singh A.K. (2014) Drying kinetics and quality characteristics of beetroot slices under hot air followed by microwave finish drying. African Journal of Agricultural Research, 9(12), 1036–1044. http://dx.doi.org/10.5897/AJAR2013.7759
  26. Kumar, M., Sansaniwal, S.K. & Khatak, P. (2016) Progress in solar dryers for drying various commodities. Renewable and Sustainable Energy Reviews, 55, 346–360. https://doi.org/10.1016/j.rser.2015.10.158
  27. Onwude, D.I., Hashim, N., Janius, R. B., Nawi, N. M., & Abdan, K. (2016) Modeling the Thin-Layer Drying of Fruits and Vegetables: A Review. Comprehensive Reviews in Food Science and Food Safety, 15(3), 599–618. https://doi.org/10.1111/1541-4337.12196
  28. Phitakwinai, S., Thepa, S., & Nilnont, W. (2019) Thin‐layer drying of parchment Arabica coffee by controlling temperature and relative humidity. Food Science & Nutrition, 7(9), 2921–2931. DOI: 10.1002/fsn3.1144
  29. Sanni, L. and Odukogbe, O. (2016) Mathematical Modelling of Thin-layer Drying Kinetics of Cassava Meal in a Conductive Rotary Dryer. Advance Journal of Food Science and Technology, 12(10), 535–543. http://dx.doi.org/10.19026/ajfst.12.3300
  30. Sengar, S., Khandetod, Y., & Mohod, A. (2009) Low cost solar dryer for fish. African Journal of Environmental Science and Technology, 3
  31. Siddique, A.B. and Wright, D. (2003) Effects of Different Drying Time and Temperature on Moisture Percentage and Seed Quality (Viability and Vigour) of Pea Seeds (Pisum sativum L.). Asian Journal of Plant Sciences, 2, 978-982. DOI: 10.3923/ajps.2003.978.982
  32. Siqueira, V.C., Borém, F.M., Alves, G.E., Isquierdo, E.P., Pinto, A.C.F., Ribeiro, D.E., & Ribeiro, F.C. (2017) Drying kinetics of processed natural coffee with high moisture content. Coffee Science, 12(3), 400-409. http://dx.doi.org/10.25186/cs.v12i3.1320
  33. Suherman, S., Azaria, N.F. & Karami, S. (2018) Performance Study of Fluidized Bed Dryer with Immersed Heater for Paddy Drying. Quality in Research: International Symposium on Materials, Metallurgy, and Chemical Engineering. 24–27 July 2017, Bali, Indonesia, 316, 012026 (2018). https://iopscience.iop.org/article/10.1088/1757-899X/316/1/012026
  34. Tashtosh, G.M., Jaradat, M., Zuraiakt, S. & Aljarah, M. (2014) Mathematical Model of Indirect Solar Drying of Dairy Products (Jameed), Energy and Environmental Engineering, 2(1), 1–13. DOI: 10.13189/eee.2014.020101
  35. Tzempelikos, D.A., Vouros, A.P., Bardakas, A.V., Filios, A.E., & Margaris, D.P. (2014). Case studies on the effect of the air drying conditions on the convective drying of quinces. Case Studies in Thermal Engineering, 3, 79–85. https://doi.org/10.1016/j.csite.2014.05.001
  36. Tzempelikos, D.A., Vouros, A.P., Bardakas, A.V., Filios, A.E., & Margaris, D.P. (2015) Experimental study on convective drying of quince slices and evaluation of thin-layer drying models. Engineering in Agriculture, Environment and Food, 8(3), 169–177. https://doi.org/10.1016/j.eaef.2014.12.002
  37. Vega, A., Fito, P., Andrés, A., & Lemus, R. (2007). Mathematical modeling of hot-air drying kinetics of red bell pepper (var. Lamuyo). Journal of Food Engineering, 79(4), 1460–1466. https://doi.org/10.1016/j.jfoodeng.2006.04.028
  38. Yassen, T.A. and Al-Kayiem, H.H. (2016) Experimental investigation and evaluation of hybrid solar/thermal dryer combined with supplementary recovery dryer. Solar Energy, 134, 284-293. https://doi.org/10.1016/j.solener.2016.05.011

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