An experimental case study on development the design and the performance of indirect solar dryer type for drying bananas

El-Sebaey, Mahmoud S.; Mousavi, Seyed M.T.; El-Din, Sh. Shams; Essa, F.A.

doi:10.1016/j.solener.2023.03.023

Cited by 29 publications

(4 citation statements)

References 27 publications

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“…For this solar dryer, banana samples were dried from 3.5566 to 0.2604 kg/kg on a dry basis. A similar study was conducted by El-Sebaey et al [8]. They used an indirect solar dryer to reduce the moisture content of banana slices.…”

Section: Introduction 1introductionmentioning

confidence: 83%

Design, Simulation and Optimization of a Novel Transpired Tubular Solar Air Heater

Nemati

2024

Energies

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In this paper, a novel tubular solar air heater is introduced. In this air heater, the hot boundary layer is drawn into the absorber tube and can provide thermal energy at moderate temperatures. Several different cases were simulated and a correlation was proposed to predict the collector’s effectiveness as a function Rayleigh number and Reynolds number. An equation was derived to find the effectiveness of this collector. Finally, a real case was studied with non-uniform solar flux distribution, as well as radiation heat loss. Good agreement was found between the results and those derived by the proposed analytical method. For different suction values, the first-law and the second-law efficiencies were calculated. Based on the exergy analysis, exergy destruction in absorption is the dominant factor that is unavoidable in low-temperature collectors. It was shown that there is an optimum suction value at which the second-law efficiency is maximized. At the optimum point, temperature rise can reach 54 K, which is hardly possible with a flat plate collector. Based on the exergy analysis, the relation between tube wall temperature and air outlet temperature in their dimensionless forms at the optimum working condition was derived, and it was shown that effectiveness at the optimum working condition is around 0.5. This means that the air temperature rise shall be half of the temperature difference between collector wall and the ambient temperatures. A high outlet temperature besides the low cost of construction and maintenance are the main advantages of this air heater. With such a high temperature rise, this type of collector can increase the use of solar energy in domestic applications.

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Section: Introduction 1introductionmentioning

confidence: 83%

Design, Simulation and Optimization of a Novel Transpired Tubular Solar Air Heater

Nemati

2024

Energies

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“…With continued support and investment, the banana industry is expected to thrive and contribute to the country's agricultural sector and economy. Currently, solar drying offers numerous benefits for dried bananas [2] , [3] , [4] , including cost-effectiveness, nutritional retention, extended shelf life, convenience, sustainability, and income generation [5] . It is a viable and sustainable method for banana processing that adds value to the crop and contributes to the development of the agricultural sector.…”

Section: Objectivementioning

confidence: 99%

“…This study's final moisture content was similar to previous research on directly forced convection household solar dryers [ 5 , 6 ]. The case of sliced bananas in an active indirect mode solar dryer provided a final moisture content of 12% (wet basis) [ 3 , 7 ]. The difference in product quality could be influenced by the drying process design and the sample characteristics.…”

Section: Data Descriptionmentioning

confidence: 99%

Dataset on the optimization by response surface methodology for dried banana products using greenhouse solar drying in Thailand

et al. 2023

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“…However, although heating accounts for a significant portion of the global energy consumption, it is given less attention compared to other sectors [2]. Among the solar energy harvesting methods available, solar air heaters (SAHs) are widely recognized as a cost-effective option for various purposes, including drying [3], room heating, and industrial activities [4].…”

Section: Introductionmentioning

confidence: 99%

Thermal Performance Evaluation for Two Designs of Flat-Plate Solar Air Heater: An Experimental and CFD Investigations

et al. 2023

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The main objective of this research was to create two different configurations of a flat-plate solar air heater, namely, Conventional-Case A and Modified-Case B, and develop a three-dimensional computational fluid dynamics (CFD) model using ANSYS R15.0. The purpose of the CFD model was to simulate the heat transfer behavior of the proposed solar air heaters under unsteady conditions. The RNG k-ε turbulence model was employed for this CFD study. The experiments were conducted on sunny days, under the same conditions as the Egyptian climate. The results of the experiments show that the simulated CFD model and the measured outlet airflow temperatures, relative humidity, and velocities of the two tested solar air heaters were compared. The developed model made very satisfactory predictions. Moreover, the deviations between the average CFD outlet air temperatures and the experimental results were 7% and 7.8% for Case B and Case A, respectively. The CFD-simulated average relative humidity was reduced by 31.6% when using Case B compared with Case A, and it was reduced by 28.8% when comparing the experimental data to Case B. Additionally, the average CFD thermal efficiencies obtained for Case B and Case A were 28.7% and 21.6%, respectively, while the average experimental thermal efficiencies for the cases were 26.4% and 18.2%, respectively. The proposed model can be used to design and simulate other solar air heater designs.

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An experimental case study on development the design and the performance of indirect solar dryer type for drying bananas

Cited by 29 publications

References 27 publications

Design, Simulation and Optimization of a Novel Transpired Tubular Solar Air Heater

Design, Simulation and Optimization of a Novel Transpired Tubular Solar Air Heater

Dataset on the optimization by response surface methodology for dried banana products using greenhouse solar drying in Thailand

Thermal Performance Evaluation for Two Designs of Flat-Plate Solar Air Heater: An Experimental and CFD Investigations

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