54
3 Energy
Figure 3.10 Measured consumption profile of a production profile of a machine
While the use of exact data allows the representation of extreme values, such
as consumption peaks, those extrema are completely lost due to mean value formation (Figure 3.11). Another difference is the underlying simulation technique
for the case of the energy data simulation. While the status-based mean values
can be represented by using DES, the use of continuous simulation techniques
such as SD is required for the simulation of exact power consumption profiles.
For a mathematical calculation, the energy consumption of a production
machine is generally split up into a fixed and a variable share. The constant consumption rate of a machine includes the energy which is used for all units that
enable the operating state (e.g., control units, coolers, …). While the machine
is in off-state, the electricity demand can be assumed to be zero. Depending on
the complexity of the machine, a start-up process from off or standby mode into
idle or producing may be required. This warmup requires a defined amount of
time, t warmup , and has a machine and state-specific power consumption profile
[Be2017, p. 135]. After finishing the warmup process, the machine can either go
in producing or idle state. Once the manufacturing machine goes from idle into
3 Energy
Figure 3.10 Measured consumption profile of a production profile of a machine
While the use of exact data allows the representation of extreme values, such
as consumption peaks, those extrema are completely lost due to mean value formation (Figure 3.11). Another difference is the underlying simulation technique
for the case of the energy data simulation. While the status-based mean values
can be represented by using DES, the use of continuous simulation techniques
such as SD is required for the simulation of exact power consumption profiles.
For a mathematical calculation, the energy consumption of a production
machine is generally split up into a fixed and a variable share. The constant consumption rate of a machine includes the energy which is used for all units that
enable the operating state (e.g., control units, coolers, …). While the machine
is in off-state, the electricity demand can be assumed to be zero. Depending on
the complexity of the machine, a start-up process from off or standby mode into
idle or producing may be required. This warmup requires a defined amount of
time, t warmup , and has a machine and state-specific power consumption profile
[Be2017, p. 135]. After finishing the warmup process, the machine can either go
in producing or idle state. Once the manufacturing machine goes from idle into