Two cased studies from eTech with plants in the food processing industry, show some of the remarkable efficiencies that can be gained by adding the right equipment.
Case Study #1 – Food Processing Plant: Condensing Economizer
Assumptions:
- Original boiler efficiency 86%
- Fuel cost $7.8 per mm Btu
- Average load 8200 hrs/yr at 80%
Application:
- Simple condensing, preheating make-up water
- 40,000 pph and 60,000 pph (150 psig)
Analysis
- Installed cost of $680,000
- Annualized fuel savings of $640,000
- Simple payback just under 13 months
Case Study #2 – HJ Heinz Processing Plant: Circular Econopak
Application:
- Circular Econopak designed and manufactured for natural gas-fired 400 hp fire-tube steam boiler
Analysis:
- Stack gas temperature lowered from 480º F to 350º F at full-fire conditions
- Water tempurature in economizer increased from 227º F to 275º F
- 165º F differential translates to fuel savings of 674,123 Btu/hr at full fire
- 4% increase in boiler efficiency
For more info about condensing economizers, Econopaks, and other efficiency solutions, contact Campbell-Sevey.
