Function

The SmartFan is a self-powered, clean, silent and efficient device that greatly improves heat circulation from a wood-burning stove. The device is powered by a thermoelectric generation (TEG) module which uses the hot surface of the stove to generate an electric current to propel two fan blades. Heat, instead of rising immediately to the ceiling, is propelled directly into the living space and provides an increased level of comfort and greater fuel efficiency from the stove. The device works on a simple principle; the hotter the bottom and the colder the top, the more electricity is generated. In order to maximise its' output, the unique design incorporates an axial fan on the top section which keeps this part cooler and projects hot air into the living space. The combination of the axial fan on the top section and the aerodynamic front fan blade allows the SmartFan can move air up to a rate of 200CFM. The device has no energy costs and promotes responsible energy consumption.

Inspiration

A thermoelectric generation (TEG) device works on the simple principle; as the temperature difference between the two sides of the device increases. This is also directly proportional to rate of charge carrier movement within the cell which in turns increases voltage out. With this concept in mind, I designed an aluminium extrusion that could incorporate an axial fan to achieving greater levels of heat dissipation; increasing the temperature difference, voltage out and turning what would have been a negative into a positive. The shape of the base extrusion is designed to contain the heat as it rises through convection. The aerofoil fan blade has been designed to propel these heat currents into the living area promoting more efficient fuel usage.

Development

The SmartFan was initially developed using a 3D model within SolidWorks. This was then turned into a very crude prototype with the main focus placed on product testing. After testing was completed, the tooling for the extrusions were manufactured and the product was created. The SmartFan can propel heated air into the living area at a rate of 200CFM.