Heat Recovery System Recycles Otherwise Wasted Energy
A heat recovery system that takes as little as six months from initial design to startup could help businesses save between 8 percent and 15 percent in long-term annual natural gas costs, says Nashville, Tenn.-based Thermsavers Inc. According to the company, any industry utilizing boilers greater than 300 hp can take advantage of the heat recovery system.
"Businesses are suffering because of rising energy prices," said William “Buddy” Stack, president of Thermsavers Inc. "This inflation creates financial cutbacks that crush companies’ ultimate goals and leave people without jobs. Companies that utilize the Thermsavers system decrease their consumption and increase their efficiency. Ultimately, the savings puts money back into the company."
The system already has found use in the laundry industry. E-town Laundry and Dry Cleaning in Elizabethtown, Ky. installed a system in July 2006 and recycled 3 billion BTU of waste heat to save $24,000 in the first year.
According to Stack, companies that take advantage of the Thermsavers system save an average of one to two month’s natural gas usage per year and experience a payback range of one and a half to three years.
Stack credits the design of the Thermsavers system for its efficiency. Unlike traditional in-stack economizers that only remove dry heat, the Thermsavers system recycles both wet and dry exhaust because it is completely independent from the boiler stack. When active, it recycles approximately 70 percent to 80 percent of the boiler's flue gases and moves the waste to a heat exchanger, where the gases drop below the temperature at which they condense. The recycled energy then heats water for the unique purpose of the facility.
Once installed, the unit is controlled using Internet-based monitoring technology, eliminating the need to hire additional employees as system managers. The software automatically shuts the system down when boilers are inactive; carefully controls temperatures to prevent corrosion; and responds instantly when boiler loads change. Also, it allows system data and actual savings to be viewed securely in real-time by the company.