SOLAR THERMOBOX: A LOW-COST DEVICE AS THERMAL INSULANT AND SUBSTITUTE FOR OVENS AND DRYERS IN PARTLY CLOUD CONDITIONS

Resumo

The global pressure for renewable energy, driven by the need to reduce reliance on fossil fuels and environmental impacts, has elevated the prominence of solar energy. Brazil's geographical location positions it as one of the main candidates for harnessing solar radiation. Practical solar applications, such as solar-powered ovens and dehydrators for cooking, offer an ecological option, especially in underserved communities. However, challenges arise when devices operate under variable solar conditions. To address this, the aim of this study was to develop and validate a versatile Solar Thermobox, using low-cost reused materials such as wood, cardboard, styrofoam, and glass. The design, optimizing space and heat absorption, integrates styrofoam, cardboard, and laminated paper. Tests showed revealed that Thermobox achieved temperatures of 50°C to 60°C even under partly cloudy skies and conditions that effectively dehydrate food. Its insulating properties extend to thermal conservation, retaining beverage temperatures. The impressively low construction cost of <US$8 demonstrates affordability, making it a viable alternative to standard solar dryers and ovens. The device's multifunctionality, combining drying, cooking, and insulation, holds potential for electricity-deprived or resource-limited communities. The innovation's benefits go beyond personal use, offering income generation through food production or resale, aligning with Sustainable Development Goals. Ultimately, the multifunctional Solar Thermobox embodies the application of sustainable energy, addressing various needs and contributing to a greener future.