Case study · Food processing · Compressed air
Base-plus-trim control cut compressor energy by a quarter, 491.77 to 368.25 kWh a day.
Evidence: Measured on the compressor feeder · about ₹3.01 lakh a year
- Industry
- Parboiled rice mill
- System
- Compressed air
- Data used
- Per-feeder energy monitoring, compressor control log
491.77 → 368.25 kWh/dayCompressor feeder energy
−25%about 44,468 kWh a year
about ₹3.01 lakha year
What was found
The mill’s two compressors, 50 HP and 20 HP, both ran part-loaded, with neither acting as a stable base.
What was done
The 50 HP unit was set as base and the 20 HP unit as no-bleed trim, with tuned load and unload setpoints. It was a zero-cost change.
Cost and benefit
| Before | 491.77 kWh/day |
|---|---|
| After | 368.25 kWh/day |
| Energy saved | about 44,468 kWh a year (−25%) |
| Money saved | about ₹3.01 lakh a year |
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