How to verify the actual effect before and after FFU energy-saving renovation?

Direct answer: Baselines for power consumption, air volume, filter status and cleanliness should be established before the transformation, and retested according to the same measurement boundaries after the transformation. The energy-saving effect depends not only on the changes in power consumption under comparable working conditions, but also on confirming that the target air volume, airflow distribution and cleanliness do not deviate from the project requirements. Merely relying on the nominal power of a new motor or the current at a certain moment cannot prove that the project actually saves energy.

FFU energy-saving transformation may involve motor replacement, speed adjustment, control partitioning or operation strategy adjustment. Different measures change the parameters differently. If the air volume is reduced after the transformation, the electricity consumption is usually also likely to be reduced, but this result must be judged together with the cleanliness target and cannot be used alone as evidence of the success of the transformation.

Before transformation: Complete baseline measurement

Select the FFU and power supply circuit that need to be compared, and record the operating time, actual power consumption, equipment quantity, operating gear, single unit or zone air volume, filter model and pressure difference in normal production and duty modes. Wind speed distribution, cleanliness and associated pressure differentials in critical areas should also be recorded.

The measurement boundary must be clear: what is being compared is the power consumption of the FFU itself , or the power consumption of the control equipment and related air-conditioning systems. If different boundaries are used before and after, the energy saving rate will not be comparable.

After transformation: Verify performance first, then calculate energy savings

newAfter the FFU configuration or control strategy is put into operation, first confirm that the actual air volume, wind speed distribution, filter sealing and cleanliness of each mode meet the technical agreement, and then record the power consumption data under the same boundaries. Clean room performance testing should clarify the operating status and measurement methods; ISO 14644-3 provides a methodological framework for testing under different air flow types and operating status.

If the filter resistance, production load, operating hours or working mode ratio are different before and after the transformation, these differences should be recorded and reasonable adjustments should be made in the energy saving calculation. The IPMVP measurement and verification principle emphasizes the comparability of baseline and reporting period conditions, as well as adjustments to changing conditions. Directly comparing two months' electricity bills makes it easy to miscalculate production changes as FFU transformation effects.

Use two types of results to jointly judge

Projects that require zoned speed regulation should also be checkedWhether the set gear of the FFU group control system is consistent with the actual operating status. If the energy saving mainly comes from the duty mode, the operating hours and test results of this mode should be listed separately to avoid taking the instantaneous power reduction directly as the annual energy saving rate.

Aili Industrial can evaluate motor and complete machine modification plans based on the original FFU configuration, target air volume, filter resistance and control requirements. The project should determine the before and after comparison working conditions during the prototype stage, and then write the power consumption measurement boundaries, clean performance requirements and acceptance methods into the technical agreement. The specific energy-saving effect is subject to on-site comparable data.