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This is a Experimental Study study.

September 19, 2025

Experimental Investigation of an Appropriate Thin Layer Drying Model of an Integrated Greenhouse and Flat Plate for Solar Coffee Dryer

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Experimental investigation identifies effective drying models in a solar coffee dryer, highlighting impacts on moisture content and quality.

The study reveals that the Newton model best explains coffee drying behavior in the integrated solar systems.
Statistical analysis indicates an R² of 0.99 for the Newton model in the integrated flat plate dryer, optimizing performance.
After drying, 24.14 kg of moisture was removed from 50 kg of coffee over 80 hours, significantly more efficient than 130 hours in open sun.
Daily average solar insolation reached 673.267 W/m² during the test period in November and December, contributing to effective drying.

Tefera et al. (2025) studied this question.

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Experimental investigation identifies effective drying models in a solar coffee dryer, highlighting impacts on moisture content and quality.