The decision this case can inform
Use this record when treating a baghouse, duct, leakage, cleaning system, and induced-draft fan as one energy-and-reliability system.
EPA ENERGY STAR partner profile citing a project percentage. It gives no absolute kWh, pressure-drop trend, emissions result, or availability series.
What the public record actually establishes
- F1
CalPortland upgraded kiln-exhaust filtration at the Mojave cement plant.
- F2
The project changed the kiln-exhaust fan system as part of the baghouse upgrade.
- F3
EPA's profile reports a 40–50% improvement in fan efficiency.
- F4
The cited result is not described as a 40–50% reduction in whole-plant energy use.
Facts and reported results are kept separate from the lesson a plant may choose to test.
Operating context
Kiln-exhaust filtration and fan performance were upgraded.
Intervention or finding
A baghouse upgrade changed the kiln-exhaust fan system.
Documented result
EPA award profile reports 40-50% fan-efficiency improvement.
Plant interpretation
Evaluate baghouse pressure drop, air leakage, cleaning, ducts, fan selection, and operating point as one system.
Transfer boundary
No absolute energy, pressure-drop, emissions, or availability data; not a whole-plant reduction.
Questions to verify at your plant
These are decision checks, not operating instructions. Resolve them through local risk assessment, technical review, and authorization.
- 01
What were the before/after airflow, static pressure, gas temperature, damper position, leakage, and fan operating point?
- 02
How do bag selection, cleaning logic, hopper condition, false air, and duct losses affect system resistance?
- 03
Are emissions performance and process availability protected across startup, upset, and high-load operation?
- 04
Will absolute fan kWh and specific energy be measured at comparable process conditions?