DESIGN AND FABRICATION OF ELECTRIC/GAS DEHYDRATOR

Student: Ayotunde Adedamola Ayoola
Supervisor: Mrs Toyeebah Folake Olatinwo
HOD: Mr Samuel Olugbenga Ogundele
Department of Mechanical Engineering Technology
Engineering
Federal Polytechnic, offa, Kwara State

Abstract

The design and fabrication of a hybrid dehydrator for drying food integrates both gas and electric heating systems to enhance efficiency, reduce energy consumption, and ensure consistent drying performance. Traditional dehydrators rely solely on electricity or solar energy, often leading to high operational costs or weather dependency. This hybrid model combines a gas-powered heating element for rapid heat generation with an electric heating system for precise temperature control, optimizing drying conditions for various food types. The dehydrator features an insulated drying chamber, adjustable trays for uniform airflow, and a thermostat to maintain optimal temperatures (50–70°C) for moisture removal while preserving nutritional quality. Key advantages include reduced drying time, lower energy costs, and adaptability to fluctuating power supply conditions, making it suitable for small-scale foods and rural applications. Performance tests indicate a 30% reduction in drying time compared to conventional electric dehydrators, with improved product shelf life and texture. The hybrid design also incorporates safety mechanisms such as overheating protection and gas leakage detectors. This innovation presents a sustainable and cost-effective solution for food preservation, addressing post-harvest losses in regions with limited access to reliable electricity

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