Performance evaluation of a solar greenhouse dryer for coffee drying in the Peruvian high Andes: an energy, exergy, economic, and environmental approach

Key Points

• This research aims to evaluate the performance of a solar greenhouse dryer in drying coffee, focusing on energy and environmental metrics.
• Designed and constructed a solar greenhouse dryer
• Conducted experimental evaluations of its performance
• Measured humidity reduction in parchment coffee
• Analyzed energy and exergy efficiencies
• Calculated economic aspects including payback period
• Humidity of parchment coffee reduced to 11.1% in four days
• Achieved an exergy efficiency of 40%
• Average energy efficiency recorded at 33%
• Maximum temperature in the dryer reached 52.5°C
• Calculated payback period of 5.48 years

Abstract