David Bohn serves as the president of Preferred Utilities Manufacturing Corporation, a Danbury, CT-based manufacturer of products for nuclear power facilities with locations in Andover, MA; New York, NY; and Redding, CT. In 2016, David Bohn and the Preferred Special Combustion Engineering (PSCE) division of his company collaborated with the Wright-Patterson Air Force Base (WPAFB) to convert two coal-burning boilers into natural-gas heating plants.
The $15.4 million project focused on modifying existing coal-fired boilers to meet newly implemented air emission regulations set forth by the US Environmental Protection Agency (EPA). WPAFB’s previous configurations for supplying steam and hot water to over 14.5 million square-feet of controlled space consumed more than 44,000 tons of coal annually, an amount that exceeded the EPA’S Maximum Achievable Control Technology (MACT) emission limits. Deadlines established by the EPA gave the Dayton, Ohio, base until January 2017 to complete conversions.
Completed in September 2016, the finished project features two natural gas–fired high temperature hot water (HTHW) generators that utilize wall-mounted burner configurations. The generators also use a unison-fired system that jointly controls fuel and air systems and inhibits individual firing. In addition to meeting standards for reduced NOx and carbon monoxide emissions, the generators achieved decreased emissions of carbon dioxide by 50 percent.