BENEFITS / SAVINGS
REDUCED VARIABILITY IN OPERATION
PARAMETER | BEFORE | AFTER | BENEFIT |
---|---|---|---|
Upper Limit Deviations | 30-35% | 14-15% | 2% lower input material cost |
Lower Limit Deviations | 7-8% | 3-4% | 15% reduction in OffSpec rejection |
Before Change | After Changes | Remarks | |
---|---|---|---|
Hot Air Inlet Set Point | 70°C | 70°C | Starting point |
Absolute Controller Error % | 49 mm | 8.5 min | (SP-PV)/ SP Average over time |
% Overshoot above set point before stabilizing back | 2.1% | 5.6% | Overshoot reduce to SP within 5min. |
Standard deviation in Temperature during stable control (after SP Reached) | 0.26 | 0.16 | Average deviation temperature set set point over 3 hour operation cycle. |
Average Value Opening | 71.3% | 53.4% | Average over start up time |
Steam consumed during Start-up (kg) (assuming 'S' kg/min steam rate at 100% Value OPening and converting over toral cycle time) | 0.713*S*49=35 S | 0.535*S*8.5=4.5 S | Nearly 87% reduction in Start-up/Re-start Wastage |