Posted by Adirondack case guy on February 03, 2013 at 06:04:14 from (74.69.160.79):
In Reply to: Re: Half way point posted by Jeff B. on February 02, 2013 at 21:22:10:
Jeff, Rather pricy pex tubing imbedded in spray foam inside a 4-6" black plastic pipe should be used to get the hot water from the OWB to the house, or much of your heat energy will be lost in the ground. Once your hot water is in your home, it is tied to your home distribution system. If you have an existing hydronic heating system, your boiler is fed at the return port, and and the return to the OWB is Teed into the distribution manifold. If you have a Forced Air heating system, you need to purchase a properly sized water/air heat exchanger. That coil will be mounted in the hotair plenum above the jacket of your furnace. In both systems your Tstats will work the same as before. Wood gasifiers work totally different than conventional OWBs. they are air tight and the wood only burns when ther is demand for heat. When there is demand, there is two chambers, the top one that holds the wood, and the gasification chamber, below it. On the burn cycle a combustion fan starts up and opens a flapper door alowing combustion air to be forced in both chambers. The air is forced downward through the wood and the fire is in the bottom of the stack. At the bottom of the wood chamber there are a configuration of "nozzles" (small openings that the combustion air rushes through). As you know, when you blow on an ember it comes back to life. The air rushing through the nozzles into the gasification chamber is very hot, 1200F-2000F. All the oils and particulats (cresote) are burned rather than just being allowed to escape up the chimney. The flu returns are in the bottom of the gasser and capture this extream heat, disipating it into the water jacket, making these boilers react quickly to demand. The burn cycles will vary in length and intervals, and when there is no demand the wood is setting in a dormant state , deprived of oxygen, not smoldering, and emitting smoke. That is why gassers burn so much less wood. You might wonder how the wood rekindles for the next burn cycle. That is where "Bigger isn"t Better" During the dormant cycle the wood actually bakes in the chamber, and there is always those little white embers on the bottom peices of wood. Blow on them they light. If the boiler is too big the dormant cycle can be extended too long and the wood will not relite. Normal cycles on a properly sized boiler wouls be, 15-30min. burn,-1-2hr dormant. depending on demand. Hope I haven"t confused you. Loren the Acg.
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Today's Featured Article - Listening to Your Tractor - by Curtis Von Fange. Years ago there was a TV show about a talking car. Unless you are from another planet, physically or otherwise, I don’t think our internal combustion buddies will talk and tell us their problems. But, on the other hand, there is a secret language that our mechanical companions readily do speak. It is an interesting form of communication that involves all the senses of the listener. In this series we are going to investigate and learn the basic rudimentary skills of understanding this lingo.
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