3D model of the wood-fueled space heating system. The system is mostly designed for family houses. The wood-fueled space heating system is composed of a stove, directly connected to the piping conveying the water of the radiator (or rather 'central heating') system. The piping hereby is directly attached to the boiler, meaning that the water flowing trough the central heating system directly flows into the boiler (rather than using a heat exchanger within the boiler). The stove hence acts as a auxiliiary heater to the water distribution system of the house and does not necessairly need to be always lit in order to provide hot water (hot water, ie for showering, kitchen use, ...) can thus always be attained by only having the water heater on the boiler activated. The stove however does need to be lit in order to heat the radiators. Also note that in the event that the house can be heated with the stove alone and the radiators are not required, the radiators can be manually shut off, by means of manual valves. Also note the extra PCB controlling the 2 electric valves and the pump (green in model). These allow the water to be circulated (the valves are opened by it when putting the PCB on). The speed of the pump can also be controlled. The whole of the PCB, valves and pump are called the 'water circulation module' and is put in the on-stance by the user when the radiators need to operate (in this event, the valves on the radiator are opened aswell).
Finally, the stove can be used to heat cooking pots (as shown in the model). Also, a very simple wood stove system is integrated. It consists of a secundairy air circulation which allows some air to pass trough the charcoal box (which consists of 2 sieves), hereby producing some wood gas that is ignited at the top (after passing trough a side compartment). The charcoal can be added to this charcoal box from leftover ash/charcoal in the firebox, ie after a previous burn.
In the event too little wood gas is produced (it is after all done using a secundairy air flow, and it is hence not a true wood gasifier), then electrical fans could be mounted.
Also, 2 valves are present on the stove (one in the chimney, the other at the air inlet). These allow controlling the burning of the wood as efficiently as possible. There is also a soot box mounted at the bottom of the chimney (marked in yellow). This allows collecting some filth from the gases flowing up the chimney and into the atmosphere. Also, a simple filter system is mounted in the top of chimney, consisting of clay balls, these allow to clean up the outgoing gases as good as possible. Alternatively, another medium rather than clay balls can be used aswell. See the 'Purchasing_the_models' link at appropedia's AT_CAD_Team for additional information on the model