Last month, we discussed using a non-pressurized thermal storage tank, in combination with brazed plate heat exchangers in a system supplied by a cordwood gasification boiler. The brazed plate heat exchangers were presented as an alternate to copper coil heat exchangers immersed within the tank.
The system presented in last month’s column is a complete system for those committed to operating the cordwood gasification boiler whenever the thermal storage tank has cooled to the point where it cannot maintain comfort in the building. Wood burning “purists” would be fine with this system. However, others may want to enhance its ability to maintain building comfort at times when the wood-burning boiler is not active and thermal storage is depleted.