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Research Papers

Experimental Investigation of Drying Thymus Cut Leaves in Indirect Solar Dryer With Phase Change Material

[+] Author and Article Information
A. A. El-Sebaii

Department of Physics,
Faculty of Science,
Tanta University,
Tanta 31111, Egypt
e-mail: ahmedelsebaii@yahoo.com

S. M. Shalaby

Department of Engineering
Physics and Mathematics,
Faculty of Engineering,
Tanta University,
Tanta 31111, Egypt
e-mails: saleh_shalaby@yahoo.com;
saleh.shalaby@f-eng.tanta.edu.eg

1Corresponding author.

Contributed by the Solar Energy Division of ASME for publication in the JOURNAL OF SOLAR ENERGY ENGINEERING: INCLUDING WIND ENERGY AND BUILDING ENERGY CONSERVATION. Manuscript received April 27, 2017; final manuscript received August 28, 2017; published online September 28, 2017. Assoc. Editor: Gerardo Diaz.

J. Sol. Energy Eng 139(6), 061011 (Sep 28, 2017) (7 pages) Paper No: SOL-17-1161; doi: 10.1115/1.4037816 History: Received April 27, 2017; Revised August 28, 2017

In this work, the indirect solar drier (IDSD) is used for drying Thymus by using four techniques. First, the whole leaves of Thymus are dried using the IDSD without using phase change material (PCM). The obtained results of this experiment show that the moisture content of Thymus leaves decreases slowly in the first three days, which is considered abnormal behavior compared with most studied dried plants in the literature. In order to reduce the drying time, the Thymus leaves are cut before drying without using the PCM. The results indicated that cutting Thymus leaves reduces the drying time by 55.6%. To increase the operating time of the IDSD and control the drying temperature as well, the IDSD is integrated with paraffin wax as a PCM. This reduces the drying time of cut leaves by 50% compared with the system without using the PCM. Moreover, eleven mathematical models are tested in order to select the best one describing the drying behavior of whole and cut leaves in the IDSD without and with using the PCM. As a result of the abnormal behavior of drying Thymus, most of the examined mathematical models failed to describe the drying behavior of Thymus satisfactory. Therefore, a new mathematical model (four-parameter logistic model) is introduced aimed to well describe the drying behavior of Thymus.

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Copyright © 2017 by ASME
Topics: Drying , Solar energy
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References

Kumar, M. , Sansaniwal, S. K. , and Khatak, P. , 2016, “ Progress in Solar Dryers for Drying Various Commodities,” Renewable Sustainable Energy Rev., 55, pp. 346–360. [CrossRef]
Shalaby, S. M. , and Bek, M. A. , 2014, “ Experimental Investigation of a Novel Indirect Solar Dryer Implementing PCM as Energy Storage Medium,” Energy Convers. Manage., 83, pp. 1–8. [CrossRef]
El-Sebaii, A. A. , Aboul-Enein, S. , Ramadan, M. R. I. , Shalaby, S. M. , and Moharram, B. M. , 2011, “ Thermal Performance Investigation of Double Pass-Finned Plate Solar Air Heater,” Appl. Energy, 88(5), pp. 1727–1739. [CrossRef]
El-Sebaii, A. A. , Aboul-Enein, S. , Ramadan, M. R. I. , Shalaby, S. M. , and Moharram, B. M. , 2011, “ Investigation of Thermal Performance of-Double Pass-Flat and V-Corrugated Plate Solar Air Heaters,” Energy, 36(2), pp. 1076–1086. [CrossRef]
Kabeel, A. E. , Khalil, A. , Shalaby, S. M. , and Zayed, M. E. , 2016, “ Experimental Investigation of Thermal Performance of Flat and V-Corrugated Plate Solar Air Heaters With and Without PCM as Thermal Energy Storage,” Energy Convers. Manage., 113, pp. 264–272. [CrossRef]
Kabeel, A. E. , Khalil, A. , Shalaby, S. M. , and Zayed, M. E. , 2016, “ Investigation of the Thermal Performance of Flat, Finned and V-Corrugated Plate Solar Air Heater,” ASME J. Sol. Energy Eng., 138(5), p. 051004.
Fudholi, A. , Sopian, K. , Othman, M. Y. , Ruslan, M. H. , and Bakhtyar, B. , 2013, “ Energy Analysis and Improvement Potential of Finned Double-Pass Solar Collector,” Energy Convers. Manage., 75, pp. 234–240. [CrossRef]
Fudholi, A. , Sopian, K. , Ruslan, M. H. , and Othman, M. Y. , 2013, “ Performance and Cost Benefit Analysis of Double-Pass Solar Collector With and Without Fins,” Energy Convers. Manage., 76, pp. 8–19. [CrossRef]
Devahastin, S. , and Pitaksuriyarat, S. , 2006, “ Use of Latent Heat Storage to Conserve Energy During Drying and Its Effect on Drying Kinetics of a Food Product,” Appl. Therm. Eng., 26(14–15), pp. 1705–1713. [CrossRef]
Cakmak, G. , and Yidiz, C. , 2011, “ The Drying Kinetics of Seeded Grape in Solar Dryer With PCM-Based Solar Integrated Collector,” Food Bioprod. Process., 89(2), pp. 103–108. [CrossRef]
Esakkimuthu, S. , Hassabou, A. , Palaniappan, C. , Spinnler, M. , Blumenberg, J. , and Velraj, R. , 2013, “ Experimental Investigation on Phase Change Material Based Thermal Storage System for Solar Air Heating Applications,” Sol. Energy, 88, pp. 144–153. [CrossRef]
Karthikeyan, S. , Solomon, G. R. , Kumaresan, V. , and Velraj, R. , 2014, “ Parametric Studies on Packed Bed Storage Unit Filled With PCM Encapsulated Spherical Containers for Low Temperature Solar Air Heating Applications,” Energy Convers. Manage., 78, pp. 74–80. [CrossRef]
El Khadraoui, A. , Bouadila, S. , Kooli, S. , Guizani, A. , and Farhat, A. , 2016, “ Solar Air Heater With Phase Change Material: An Energy Analysis and a Comparative Study,” Appl. Therm. Eng., 107, pp. 1057–1064. [CrossRef]
Shalaby, S. M. , Bek, M. A. , and El-Sebaii, A. A. , 2014, “ Solar Dryers With PCM as Energy Storage Medium: A Review,” Renewable Sustainable Energy Rev., 33, pp. 110–116. [CrossRef]
Reyes, A. , Mahn, A. , and Vásquez, F. , 2014, “ Mushrooms Dehydration in a Hybrid-Solar Dryer, Using a Phase Change Material,” Energy Conversion Manage., 83, pp. 241–248. [CrossRef]
Jain, D. , and Tewari, P. , 2015, “ Performance of Indirect Through Pass Natural Convective Solar Crop Dryer With Phase Change Thermal Energy Storage,” Renewable Energy, 80, pp. 244–250. [CrossRef]
Agarwal, A. , and Sarviya, R. M. , 2016, “ An Experimental Investigation of Shell and Tube Latent Heat Storage for Solar Dryer Using Paraffin Wax as Heat Storage Material,” Eng. Sci. Technol., 19(1), pp. 619–631.
Prakash, O. , Laguri, V. , Pandey, A. , Kumar, A. , and Kumar, A. , 2016, “ Review on Various Modeling Techniques for Solar Dryers,” Renewable Sustainable Energy Rev., 62, pp. 396–417. [CrossRef]
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,” Innovative Food Sci. Emerging Technol., 36, pp. 59–67. [CrossRef]
Rabha, D. K. , Muthukumar, P. , and Somayaji, C. , 2017, “ Experimental Investigation of Thin Layer Drying Kinetics of Ghost Chilli Pepper (Capsicum Chinense Jacq.) Dried in a Forced Convection Solar Tunnel Dryer,” Renewable Energy, 105, pp. 583–589. [CrossRef]
Dhanushkodi, S. , Wilson, V. H. , and Sudhakar, K. , 2017, “ Mathematical Modeling of Drying Behavior of Cashew in a Solar Biomass Hybrid Dryer,” Resour. Effic. Technol., epub.
El-Sebaii, A. A. , and Shalaby, S. M. , 2013, “ Experimental Investigation of an Indirect-Mode Forced Convection Solar Dryer for Drying Thymus and Mint,” Energy Convers. Manage., 74, pp. 109–116. [CrossRef]
Lewis, W. K. , 1921, “ The Rate of Drying of Solid Materials,” J. Ind. Eng. Chem., 13(5), pp. 427–433. [CrossRef]
Page, G. E. , 1949, “ Factors Influencing the Maximum Rates of Air Drying Shelled Corn in Thin Layers,” Master's thesis, Purdue University, Lafayette, IN.
White, G. M. , Ross, I. J. , and Ponelert, R. , 1981, “ Fully Exposed Drying of Popcorn,” Trans. Am. Soc. Agric. Eng., 24(2), pp. 466–468. [CrossRef]
Chinnan, M. S. , 1984, “ Evaluation of Selected Mathematical Models for Describing Thin Layer Drying of In-Shell Pecans,” Trans. Am. Soc. Agric. Eng., 27(2), pp. 610–615. [CrossRef]
Yagcioglu, A. , Degirmencioglu, A. , and Cagatay, F. , 1999, “ Drying Characteristics of Laurel Leaves Under Different Drying Conditions,” Seventh International Congress on Agricultural Mechanization and Energy (ICAME), Adana, Turkey, May 26–27, pp. 565–569.
Henderson, S. M. , 1974, “ Progress in Developing the Thin Layer Drying Equation,” Trans. Am. Soc. Agric. Eng., 17(6), pp. 1167–1168. [CrossRef]
Wang, C. Y. , and Singh, R. P. , 1978, “ A Single Layer Drying Equation for Rough Rice,” American Society of Agricultural and Biological Engineers, St. Joseph, MI.
Karathanos, V. T. , 1999, “ Determination of Water Content of Dried Fruits by Drying Kinetics,” J. Food Eng., 39(4), pp. 337–344. [CrossRef]
Verma, L. R. , Bucklin, R. A. , Endan, J. B. , and Wratten, F. T. , 1985, “ Effects of Drying Air Parameters on Rice Drying Models,” Trans. Am. Soc. Agric. Eng., 28(1), pp. 296–301. [CrossRef]
Midilli, A. , Kucuk, H. , and Yapar, Z. , 2002, “ A New Model for Single Layer Drying,” Drying Technol., 20(7), pp. 1503–1513. [CrossRef]
Midilli, A. , and Kucuk, H. , 2003, “ Mathematical Modeling of Thin Layer Drying of Pistachio by Using Solar Energy,” Energy Convers. Manage., 44(7), pp. 1111–1122. [CrossRef]
Akpinar, E. K. , 2010, “ Drying of Mint Leaves in a Solar Dryer and Under Open Sun: Modelling, Performance Analyses,” Energy Convers. Manage., 51(12), pp. 2407–2418. [CrossRef]

Figures

Grahic Jump Location
Fig. 1

A photograph of the SAHs (a) and a photograph of the DC (b)

Grahic Jump Location
Fig. 2

Measured drying temperature and weather parameters versus time during drying 12 kg of Thymus in the IDSD without using the PCM when m˙=0.1204 kg/s

Grahic Jump Location
Fig. 3

The instantaneous moisture content of 6 kg of whole leaves of Thymus dried in the IDSD without using the PCM when m˙=0.1204 kg/s

Grahic Jump Location
Fig. 4

The instantaneous moisture content of 6 kg of cut leaves of Thymus dried in the IDSD without using the PCM when m˙=0.1204 kg/s

Grahic Jump Location
Fig. 5

Measured drying temperature and weather parameters versus time during drying 12 kg of Thymus in the IDSD with using the PCM when m˙=0.1204 kg/s

Grahic Jump Location
Fig. 6

The instantaneous moisture content of 6 kg of whole leaves of Thymus dried in the IDSD with using the PCM when m˙=0.1204 kg/s

Grahic Jump Location
Fig. 7

The instantaneous moisture content of 6 kg of cut leaves of Thymus dried in the IDSD with using the PCM when m˙=0.1204 kg/s

Grahic Jump Location
Fig. 8

Photographs of whole and cut leaves samples of thymus: (a) before drying and (b) after drying

Grahic Jump Location
Fig. 9

Moisture ratio of Thymus dried in the IDSD without using the PCM

Grahic Jump Location
Fig. 10

Moisture ratio of Thymus dried in the IDSD with using the PCM

Grahic Jump Location
Fig. 11

Comparison between experimental values of MR and those predicted by four-parameter logistic model when whole leaves of thymus are dried in the IDSD with using the PCM

Grahic Jump Location
Fig. 12

Comparison between experimental values of MR and that predicted by four-parameter logistic model when whole leaves of thymus are dried in the IDSD with using the PCM

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