by danielzube@gmail.com, Morgan.DeFoort@colostate.edu

Colorado State University Engines and Energy Conversion Laboratory, Envirofit International, Shell Foundation

Issue: 61

Journal section: General Articles
Download article in PDF format: Download Boiling Point 61_Colarado State University.pdf

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Received: 2012-10-08


This study investigates the feasibility of an extended surface heat plate accessory as a low-cost alternative to a finned pot used on cookstoves in the developing world. The objective of the heat plate is to improve heat transfer efficiency, which must be understood by examining the three governing principles of operation for such a device: contact resistance, thermal capacitance, and surface area. From here, a theoretical performance model is developed, validated, and used as a tool to predict and evaluate different heat plate designs. A more realistic contact resistance value is then quantified through experimentation and used in the performance model to determine the best manufacturing process to replicate for prototype fabrication. A working prototype heat plate is fabricated, tested, and evaluated based upon established test protocol and performance metrics. Test results further validate the theoretical model and show improved heat transfer efficiency during the low power simmer phase of the water boil test, resulting in reduced fuel usage. This research establishes useful guidelines for stove designers seeking to improve heat transfer in applications where contact resistance, thermal capacitance, and surface area of the cooking surface are of concern.

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Tags: Biomass Cookstove Design    Heat Transfer Efficiency    Contact Resistance    Thermal Capacitance    Thermal Mass    Surface Area   

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