Dehydration of the red chilli (Capsicum annuum L., costeño) using an indirect-type forced convection solar dryer

Téllez, Margarita Castillo; Figueroa, Isaac Pilatowsky; López-Vidaña, Erick César; Sarracino-Martínez, Omar; Galvez, Geovanni Hernández

doi:10.1016/j.applthermaleng.2016.08.114

Cited by 54 publications

(10 citation statements)

References 16 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Due to the agricultural biodiversity of this tropical region, in recent years, the practical potential of using solar thermal technology drying has been analyzed for various products with good commercial value for the south-southeast of Mexico [7]. M. Castillo Téllez et al [8] developed an indirect tunnel type solar dryer for application in red chili. They evaluated the drying kinetics obtaining drying times of 2.75, 3.0, and 6.25 h, for temperatures of 55 • C, 65 • C, and 45 • C, respectively.…”

Section: Introductionmentioning

confidence: 99%

Experimental Evaluation and Theoretical Optimization of an Indirect Solar Dryer with Forced Ventilation under Tropical Climate by an Inverse Artificial Neural Network

et al. 2021

View full text Add to dashboard Cite

In this theoretical–experimental study is presented a hybridization strategy based on the application of an inverse artificial neural network model (ANNi) coupled with metaheuristic optimization algorithms to optimize the drying velocity (vd) of an active indirect solar dryer for plantain and taro (Colocasia antiquorum). In the experimental stage, both fruits were evaluated in periods from 9:00 a.m. to 5:00 p.m. under a humid tropical climate region, varying the voltage of the air extractor fan (at 6 V, 9 V, and 12 V) to control the fan velocity. The experimental results showed that the maximum drying velocities were reached at 9 V, achieving a drying velocity of 1.5, 0.9, and 0.55 g/min, with a total drying time of 465 min for the taro, and 1.46, 1.46, and 0.36 g/min, with a total drying time of 495 min, for the plantain. As a result of the drying curves, it was observed that the drying velocity is higher in taro than in plantain. Subsequently, an artificial neural network (ANN) architecture was trained using the database generated from the solar dryer’s experimental stage. Six environmental variables and one operational variable were considered as the model’s inputs, feeding the ANN to estimate the drying velocity (vd), obtaining a linear regression coefficient R = 0.9822 between the experimental and simulated data. A sensitivity analysis was performed to determine the impact of all the input variables. A hybrid strategy based on ANNi was developed and evaluated with three metaheuristic optimization algorithms; the best result was obtained by genetic algorithms (ANNi-GA) with an error percentage of 0.83% and an average computational time of 4.3 s. The scope of this optimization strategy was to obtain a theoretical result that allows predicting the behavior of the dryer and improving its performance for its practical application in future work through the implementation in development boards. Lastly, the optimization strategy presented is not limited to indirect solar dryers and opens a research window for evaluating other solar drying technologies.

show abstract

Section: Introductionmentioning

confidence: 99%

Experimental Evaluation and Theoretical Optimization of an Indirect Solar Dryer with Forced Ventilation under Tropical Climate by an Inverse Artificial Neural Network

et al. 2021

View full text Add to dashboard Cite

show abstract

“…In general, these solar dryers are classified according to the mechanism of airflow, as natural or forced convection driers and into indirect or direct driers if the product receives or not direct solar radiation. Some of the best results in terms of efficiency have been reported with devices that use blowers to induce a flow from the heating plate in the collector to the chamber where the products are dried [18][19][20][21][22][23]. Also, the drying time has been reduced by the addition of heat storage systems which allow continuing the drying process during the night [24,25].…”

Section: Introductionmentioning

confidence: 99%

Improved Agricultural Products Drying Through a Novel Double Collector Solar Device

et al. 2019

View full text Add to dashboard Cite

Backyard agricultural systems are frequently used for food production in rural tropical regions all over the world. The implementation of these systems has been used as a strategy to increase food security, to preserve the phyto and zoo diversity and to provide an alternative income for poorer rural families. Nevertheless, the absence of appropriate preservation mechanisms and nonrenewable energies can lead to significant production losses that could be prevented by the implementation of solar drying devices. The objective of this project was to design, build and validate a double collector solar device for improved drying performance. To evaluate the double collector solar device, four backyard products frequently used in the Mexico Southwest regional diet were used: carrots, chayote squash, tomatoes, and oyster mushrooms. The results showed that the solar device achieved drying efficiencies between 22.8 and 37.9% by reaching moisture values below the 12.30% threshold, which according to the international standards is considered as “Low Moisture Food”. The evaluation of the double collector solar drier is demonstrated to be an easy-to-apply and environmentally friendly method for food preservation in tropical rural regions by taking advantage of domestic renewable energy resources.

show abstract

“…With the awareness of inadequacies involved in open sun drying, a more variation method of solar-energy utilization for crop drying has emerged as controlled solar drying [3]. The methods are using solar greenhouse drying system, indirect-type forced solar dryer system and double-pass solar dryer system [4][5][6].…”

Section: Introductionmentioning

confidence: 99%

Drying characteristics of red chili in a swirling fluidized bed dryer: An experimental study

2018

View full text Add to dashboard Cite

Red chili is an agricultural product that contains high moisture. In this study, the drying process of red chili was conducted by using two methods which are conventional method of drying under the sun and by using swirling fluidized bed dryer. A fluidized bed column of 108 mm in diameter with slotted distributor of 45° inclination angles was used in the experiment. Result of drying by using conventional method showed that for 1kg of sample the drying time was 13 days with 212g weight reduction and the color of the red chili changed from red to dark red. Meanwhile for swirling fluidized bed dryer the time required was 4 days, 200g weight reduction and the color of red chili maintained. Based on the results obtained, the drying of red chili by using swirling fluidized bed dryer is more efficient as compared to drying by using conventional method.

show abstract

Dehydration of the red chilli (Capsicum annuum L., costeño) using an indirect-type forced convection solar dryer

Cited by 54 publications

References 16 publications

Experimental Evaluation and Theoretical Optimization of an Indirect Solar Dryer with Forced Ventilation under Tropical Climate by an Inverse Artificial Neural Network

Experimental Evaluation and Theoretical Optimization of an Indirect Solar Dryer with Forced Ventilation under Tropical Climate by an Inverse Artificial Neural Network

Improved Agricultural Products Drying Through a Novel Double Collector Solar Device

Drying characteristics of red chili in a swirling fluidized bed dryer: An experimental study

Contact Info

Product

Resources

About