|
|
Application: Twenty gas water heaters (GWH) supply 150 degree F water @ 4 gpm to twenty flight-type, conveyor "dishwashers" used to remove mold release from injection molded plastic parts. Each parts washer requires an average of 2 GPM of 150 degree F water, 24 hours/day, 5 days/week.
Water Heater: Rheem Vanguard Model 6E743A, 199,900 Btu/hr input, 183 GPH @ 110 degree F rise, 170,000 Btu/hr output; 85% conversion efficiency .
Problem Eliminated By GFX: Heat exchanger fouling from mold release in drainwater.
Problem Reduced By GFX Model P3-60: Poor GWH recovery as supply water cools and they age.
|
Without GFX
|
|
68F Cold Supply |
45F Cold Supply |
| Process Energy Demand: |
19.68 Therm/day |
25.20 Therm/day |
| GWH Load [See Notes] |
19.68 Therm/day |
25.20 Therm/day |
| Input Energy Demand: |
23.15 Therm/day |
29.65 Therm/day |
| Input Heat Demand @ 4gpm: |
1.929 Therm/hr |
2.471 Therm/hr |
| Drainwater Heat: |
14.88 Therm/day |
20.40 Therm/day |
With GFX Model P3-60
|
| Process Energy Demand: |
19.68 Therm/day |
25.20 Therm/day |
| Measured GFX-Performance: |
Drain - 39F drop [130/ 91] |
53.6F drop
|
|
Coil - 39F rise [68/107] |
53.6F rise
|
| Measured Recycling Efficiency: |
63% |
63% |
| Heat Recovered: |
9.36 Therm/day |
12.85 Therm/day |
| GWH Load: |
10.32 Therm/day |
12.35 Therm/day |
| Input Energy Demand: |
12.14 Therm/day |
14.53 Therm/day |
| Input Heat Demand @ 4gpm: |
1.012 Therm/hr |
1.211 Therm/hr |
| Energy Savings: |
47.6% |
51.0% |
| Demand Savings: |
47.6% |
51.0% |
| Net Savings For 20 P3-60's: |
48,672 Therm/yr |
66,820 Therm/yr |
|
|
|
|
|
|
NOTE 1: Distribution & Standby Loss Neglected
NOTE 2: 1 Therm = 100,000 Btu = 29.3 kWh
*GFX Measurements , Courtesy of Jason Blankenship, MERAMEC Group.
|
