Page 221 - Boiler plant and distribution system optimization manual

206 Boiler Plant and Distribution System Optimization Manual

TABLE 11-17

Present Worth Factors (PWF)

4. If a smaller boiler with an efficiency of 83% (17% stack loss) and with a corrected
standby loss of 2% were installed, how much fuel would be saved?

(17% Stack Loss+ 2% Surface Loss) x 250,000 gallons/yr = $47,500 gallons or
($47,500/yr)

As Found Losses – New Losses = Savings/yr
$95,750 – $47,500 = $48,250/yr