Savings Analysis Studies
Installing a fuel-saving Cain exhaust heat recovery system on a combustion source usually recovers enough waste energy to pay for the equipment within 12 to 24 months (annual ROI of 50-100%). Reclaiming 30-50% of the wasted energy for every fuel dollar spent. Below are a few Savings Analysis Studies that focus on: BTU recovered/saved, equipment payback, ROI, annual and equipment life expectancy savings. The exact payback period for your installation will depend on local fuel costs and the hours of combustion operations.
ESG1 - Exhaust Steam Generator
| DATA without a Cain System | PERFORMANCE with a Cain System | ||
|---|---|---|---|
| Engine Generator | ESG1 | ||
| Heat Sink: | Steam Demand | Operating Steam Pressure: | 10 PSI |
| Waste Exhaust Temp: | 1,150°F | Final Exhaust Temp: | 301°F |
| Water Temp Inlet: | N/A | Boiler Horsepower: | 51 BHP |
| SCFM: | 1,598 | Equivalent Evaporation: | 1,743 lb/hr |
| Fuel Type: | Natural Gas | Exhaust Pressure Drop: | 1.44" WC |
| O2 Content: | N/A | BTU/hr Recovered: | 1,691,000 |
| Excess Air: | N/A | Total Cost: | $70,674 |
| Fuel Cost Per Therm: | $0.60 | ||
| Annual Operating Hours: | 8,700 | ||
| Payback: | 9.6 months | ||
| Annual ROI: | 125% | ||
| Annual Savings: | $88,277 | ||
| Life Expectancy Savings: $1,544,848 (15-20 years) | |||
HRSR - Heat Recovery Silencer Radial
| DATA without a Cain System | PERFORMANCE with a Cain System | ||
|---|---|---|---|
| Engine Generator | HRSR | ||
| Heat Sink: | Glycol / Water Loop | Circulating Liquid Flow: | 300 GPM |
| Waste Exhaust Temp: | 922°F | Final Exhaust Temp: | 387°F |
| Water Temp Inlet: | 180°F | Water Temp. Outlet: | 194.1°F |
| SCFM: | 2,766 | Water Pressure Drop: | 0.49 PSIG |
| Fuel Type: | Landfill Gas | Exhaust Pressure Drop: | 0.73" WC |
| O2 Content: | N/A | BTU/hr Recovered: | 1,845,000 |
| Excess Air: | N/A | Total Cost: | $47,431 |
| Fuel Cost Per Therm: | $0.60 | ||
| Annual Operating Hours: | 6,000 | ||
| Payback: | 6.9 months | ||
| Annual ROI: | 175% | ||
| Annual Savings: | $83,006 | ||
| Life Expectancy Savings: $1,452,605 (15-20 years) | |||
UTR1 - U-Tube Recovery 1
| DATA without a Cain System | PERFORMANCE with a Cain System | ||
|---|---|---|---|
| Engine Generator | UTR1 | ||
| Heat Sink: | Glycol / Water Loop | Circulating Liquid Flow: | 400 GPM |
| Waste Exhaust Temp: | 645°F | Final Exhaust Temp: | 357°F |
| Water Temp Inlet: | 250°F | Water Temp. Outlet: | 263.3°F |
| SCFM: | 6,739 | Water Pressure Drop: | 0.04 PSIG |
| Fuel Type: | Natural Gas | Exhaust Pressure Drop: | 2.00" WC |
| O2 Content: | N/A | BTU/hr Recovered: | 2,341,000 |
| Excess Air: | N/A | Total Cost: | $22,455 |
| Fuel Cost Per Therm: | $0.60 | ||
| Annual Operating Hours: | 6,000 | ||
| Payback: | 4.8 months | ||
| Annual ROI: | 250% | ||
| Annual Savings: | $56,176 | ||
| Life Expectancy Savings: $983,063 (15-20 years) | |||
RTR - Rectangular Tube Recovery
| DATA without a Cain System | PERFORMANCE with a Cain System | ||
|---|---|---|---|
| 55,000 PPH Steam Boiler | RTR | ||
| Heat Sink: | Boiler Feedwater | Boiler Feedwater Flow: | 118 GPM |
| Waste Exhaust Temp: | 509°F | Final Exhaust Temp: | 343°F |
| Water Temp Inlet: | 227°F | Water Temp. Outlet: | 276°F |
| BTU/hr Burner Input: | 70,000,000 | Water Pressure Drop: | 0.87 PSIG |
| Fuel Type: | Kerosene | Exhaust Pressure Drop: | 0.68" WC |
| O2 Content: | 2.95% | BTU/hr Recovered: | 2,781,000 |
| Excess Air: | 15% | Total Cost: | $45,009 |
| Fuel Cost Per Therm: | $0.70 | ||
| Annual Operating Hours: | 4,000 | ||
| Payback: | 5.6 months | ||
| Annual ROI: | 215% | ||
| Annual Savings: | $96,816 | ||
| Life Expectancy Savings: $1,161,792 (15-20 years) | |||
FCR - Fin Coil Recovery
| DATA without a Cain System | PERFORMANCE with a Cain System | ||
|---|---|---|---|
| 500 HP Steam Boiler | FCR | ||
| Heat Sink: | Process Water | Boiler Feedwater Flow: | 25 GPM |
| Waste Exhaust Temp: | 400°F | Final Exhaust Temp: | 268°F |
| Water Temp Inlet: | 120°F | Water Temp. Outlet: | 168.61°F |
| BTU/hr Burner Input: | 20,922,000 | Water Pressure Drop: | 6.6 PSIG |
| Fuel Type: | Natural Gas | Exhaust Pressure Drop: | 0.47" WC |
| O2 Content: | 3% | BTU/hr Recovered: | 608,396 |
| Excess Air: | 18% | Total Cost: | $6,717 |
| Fuel Cost Per Therm: | $0.60 | ||
| Annual Operating Hours: | 6,000 | ||
| Payback: | 3.7 months | ||
| Annual ROI: | 326% | ||
| Annual Savings: | $21,902 | ||
| Life Expectancy Savings: $383,289 (15-20 years) | |||
