VDMA 8751: 2019-03 - Specifying and checking the energy consumption of packaging systems for specific applications

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It is foreseeable that consumption data for packaging systems will be requested more and more frequently in future. But how can data from different manufacturers be compared? Can the data be transferred to the conditions in user operation? Do they stand up to scrutiny? VDMA 8751: 2019-03 "Filling and packaging machines - Specification and measurement of energy and media consumption" provides the basis for answering these questions.

It is foreseeable that consumption data for packaging systems will be requested more and more frequently in future. But how can data from different manufacturers be compared? Can the data be transferred to the conditions in user operation? Do they stand up to scrutiny? VDMA 8751: 2019-03 "Filling and packaging machines - Specification and measurement of energy and media consumption" provides the basis for answering these questions.
The energy consumption of packaging machines depends on the operating behaviour of the machines. Typically, these systems have different energy performance levels that can be assigned to operating states. This is shown, for example, by studies carried out by the Chair of Food Process Engineering at the Technical University of Munich on various types of packaging machines. The energy consumption during production interruptions is generally lower than during running production. Many machines also reduce energy consumption during longer interruptions. Depending on the operating behaviour, this can result in considerable energy savings, e.g. in comparison to machine systems that run through production interruptions in idle mode without lowering the energy performance level. The lower the running time of the machine system, the more noticeable the savings become. From the user's point of view, it would therefore be desirable to know the consumption values for the various relevant performance levels in order to be able to carry out a realistic consumption estimate and compare machine systems from an energy point of view. 
VDMA 8751 lays the foundations for this. Based on specified energetic performance levels, consumption figures for the machine system are defined, which can be checked in an acceptance run. The basic idea here is to compare the total consumption forecast - calculated on the basis of the specified consumption values and the empirically determined operating behaviour of the machine system - with the total consumption determined in the acceptance run under realistic production conditions. The determined total consumption should be below the predicted total consumption. This makes consumption data verifiable. At the same time, an incentive is provided to specify consumption values conservatively, since optimistic consumption values increase the risk of failure in the acceptance run.
Ideally, the machine control system can record the energy performance levels identified as relevant, so that the consumption forecast can be based on data from the control system. Alternatively, the sequence of the power levels can also be determined in the acceptance run. If this effort is to be avoided, VDMA 8751 allows to specify the average consumption depending on the running time. Compared to the performance level-based specification, the simplified handling tends to cost higher consumption forecasts. Finally, the third case is considered in analogy to DIN 8743 machine systems without constant setting output. For all three cases, the procedure for the specification of the consumption values and the boundary conditions for a consumption measurement within the scope of an acceptance run are determined.
VDMA standard sheets are subject to the copyright of Beuth-Verlag and are distributed by the latter. 
VDMA members can download VDMA 8751 free of charge for internal use from the member area of the VDMA website under the following link.

 

https://www.vdma.org/dater-vdma-einheitsblaetter#daters