Building Energy Quotient
David Bohn is a Redding, CT-based business leader with a wealth of experience in the industrial heating industry. For the past 22 years, he has served as president of the Preferred Utilities Manufacturing Corporation. David Bohn holds active membership in several professional associations including ASHRAE (originally the American Society of Heating, Refrigerating, and Air Conditioning Engineers).
ASHRAE has advocated for sustainable technology within the built environment for more than 130 years. One of its many programs is Building Energy Quotient (Building EQ) quick energy analysis.
Building EQ is designed to benchmark a building’s overall energy performance to maximize efficiency and promote environmental health. To complete analysis on each building, the program uses both As Designed and In Operation evaluations. The As Designed evaluation looks at the building’s physical characteristics and systems, while the In Operation assessment looks at actual building energy use. As part of the In Operation evaluation, Building EQ performs a Level 1 Energy Audit to identify low-cost, no-cost, and other energy-efficient measures that can boost the building’s overall energy performance.
Children’s Educational Opportunity Fund
Since 1995, David Bohn of Redding, CT, has served as president of Preferred Utilities Manufacturing Corporation. Outside of this role, David Bohn contributes to numerous charitable organizations, including the Children’s Educational Opportunity (CEO) Fund of Connecticut.
Founded in 1995, CEO seeks to give students with limited resources the opportunity to attend private elementary schools. Each year, the organization distributes $800,000 in scholarships to 400 students. Since its inception, CEO has offered more than 8,400 scholarships worth more than $17 million.
The scholarships provided by CEO have the potential to make a long-term impact, as students in private school perform higher on standardized tests and are more likely to finish high school, according to the U.S. Department of Education’s report titled Private Schools: A Brief Portrait. Further, private school students from low-income households are nearly four times more likely to attend college than their peers in public schools. CEO hopes to give these students an equal opportunity to excel academically and graduate from college.
As the president of Preferred Utilities Manufacturing Corporation, Redding, CT-based industrial equipment professional David Bohn led the fuel oil and boiler equipment manufacturer to a 380 percent increase in annual corporate revenue. In addition to his administrative accomplishments, David Bohn has expertise in multiple technical areas including the prevention of dry firing in boilers.
A big problem in the boiler industry, dry firing occurs when something interferes with the regular supply of boiler feedwater. If the boiler runs out of water, and safety features fail to engage, steam pressure will soon drop to zero. Although the true cause of this drop is a complete lack of boiling water (and, therefore, steam), the boiler will automatically attempt to make up for the lack of steam pressure by increasing internal temperature. Within minutes, high temperatures can irreparably damage the boiler due to a phenomenon called metal creep.
Boiler owners and/or operators can reduce the risk of dry firing by ensuring that advanced safety controls are set to trip the boiler offline when water supply is interrupted. They can also prevent dry firing by installing header-pressure transmitters on variable-speed-drive pumps, monitoring stack temperature closely, and performing regular automated low-water cutout tests.
Preferred Utilities Manufacturing Corporation
Since 1995, David Bohn has served as president of Preferred Utilities Manufacturing Corporation in Danbury, near Redding, CT. David Bohn draws on a 30-year history with the Redding, CT-area company, during which time he has gained an in-depth knowledge of boilers and the risk of dry-firing.
A boiler depends on balanced temperature and pressure levels to operate correctly. If a boiler ever becomes empty of water, pressure drops to zero and the boiler works harder to restore pressure. The lack of water leads the boiler to overheat and can permanently damage the metal mechanism, assuming an emergency feedwater pump does not first introduce cold water to the hot metal and cause an explosion.
Testing and monitoring are key to the prevention of dry-firing. Contemporary controller systems have mechanisms for monitoring stack temperature, so that excess heat would prompt a shutoff. Similar shutoff procedures may occur with automated low water testing.
Plant owners can also help to prevent dry-firing by installing redundant feedwater pumps, which engage in the case of pump failure and can help the mechanism avoid drying. Similarly, a feedwater header-pressure transmitter can emit an alarm and engage a second pump if pressure drops, thus reducing the chance of a dry boiler.