CASE61 · Manufacturing · Compressed-air demand analysis
Reducing demand variability before deciding the compressor count
Demand peaks are traced upstream to production activity, storage and control behavior. The plan first changes the demand profile, then reassesses required online capacity.
01 · CASE ANALYSIS
Is a start caused by sustained demand or a short peak?
The source reported large load swings that led to standby capacity or extra compressor operation. Its improvement idea was demand analysis, smaller usage swings and minimum necessary running units.
The causal sequence starts at demand rather than arbitrarily switching off supply machines.
02 · CASE ANALYSIS
Historical context and event profiling
Annual analysis reported one or two idling machines and roughly two extra units at approximately 74% average load. Separate improvement records described two continuously unloaded machines totaling 440 kW despite a stated 88% load condition.
These are different source observations, not one matched test or a 440 kW saving attributable to this activity.
| Indicator | Why it matters |
|---|---|
| Peak magnitude | Required instantaneous capacity |
| Peak duration | Storage versus sustained supply decision |
| Ramp rate | Control response |
| Time of production activity | Candidate demand cause |
| Pressure and load/unload overlay | Whether extra starts maintained useful service |
03 · CASE ANALYSIS
Overlay production, flow and control
Build daily/weekly profiles with mean, upper demand levels, peak duration and rate of change. Overlay header pressure, machine starts and loading/unloading with production shifts, startups and intermittent uses.
Short peaks may be buffered by appropriate storage or staggered usage; long sustained peaks may require genuinely higher capacity.
04 · CASE ANALYSIS
Reassess capacity after demand improvement
Investigate simultaneous starts, intermittent blowing, local actuators, leaks and dryer purge as possible causes. These are diagnostic candidates, not confirmed causes in the source.
After a feasible change, remeasure the profile and choose dispatch while preserving terminal pressure and required service.
| Step | Output |
|---|---|
| Analyze demand | Locate repeated variability |
| Investigate process uses | Identify feasible changes |
| Reduce avoidable variability | Maintain productive air use |
| Remeasure demand | Updated capacity requirement |
| Select dispatch | Stable pressure and low system specific energy |
05 · CASE ANALYSIS
Verify total system response
Compare delivered air, total compressor electricity, loading/unloading, pressure stability and production output. Avoid calculating savings from the nameplate power of an unused machine.
No isolated final benefit is published for this demand-variability plan. Any future predictive sequencing remains an extension requiring site data.
APPLY TO YOUR SITE
Connect your operating data to an actionable energy strategy.
Discuss the measurement boundary, data quality, operating constraints and verification approach for your facility.
Discuss your project All English cases