Direct answer
Energy performance should be normalised to useful production. Total site consumption alone cannot show whether a line is efficient when volume, product mix, cleaning and idle time change. Meter major users, align timestamps with machine states and calculate energy per good pack.
Practical objective: an energy baseline that separates productive use, idle use, cleaning, leaks and abnormal operation.
Questions and phrases customers use
This guide also answers searches such as:
- production energy per pack
- packaging line energy monitoring
- compressed air packaging machine
- manufacturing energy KPI
Information to collect first
Use one controlled set of figures and representative production conditions. Record the source and date of each assumption so quotations and improvement options can be compared on the same basis.
- List electricity, compressed air, steam, gas, hot water, chilled water and extraction loads
- Identify major line and utility consumers
- Collect production count, product mix and operating-state data on the same time basis
- Measure start-up, idle, running, changeover and cleaning separately
- Check compressed-air leakage and inappropriate pressure
- Define energy per good pack and cost using current tariffs
How to make the decision
Work from the required finished result back through the process. Keep compliance, product quality, sustained output and total ownership cost visible together.
- Prioritise avoidable idle and leak losses before replacing efficient equipment
- Use automatic idle or sleep states where process and safety allow
- Sequence heat-up and extraction to actual production need
- Compare products and formats fairly using a defined normalisation method
- Verify savings after changes rather than relying on nameplate power
Common mistakes to avoid
- Using motor nameplate ratings as actual energy consumption
- Claiming savings during a lower-volume period without normalisation
- Ignoring compressed-air generation cost
- Reducing utilities without checking process quality or safe operation
Customer decision table
| Measure | Use |
|---|---|
| kWh per good pack | Compare energy against useful output |
| Idle energy per hour | Identify avoidable standby load |
| Compressed air flow | Find leaks and high-demand operations |
| Energy by machine state | Link consumption to running, stopped, cleaning and changeover |
Questions customers also ask
Can energy per pack rise when total energy falls?
Which utility should be measured first?
Can PLC run status replace a meter?
How should savings be verified?
Evidence to retain
Keep the controlled requirement, product and packaging samples, measurements, trial results, supplier scope and acceptance records used for the decision.
Download the planning template
Use the CSV worksheet to allocate evidence, owners, actions and dates before requesting quotations or approving a change.
Related guides and calculators
Need help applying this to your line?
Send the product, pack, current method, measured problem and required result. The more specific the evidence, the more useful the machinery review can be.