energy value stream mappinglma.berkeley.edu/posters/201114saskia-poster.pdf · 2015-01-22 ·...
TRANSCRIPT
BerkeleyUNIVERSITY OF CALIFORNIA /
© 2
011
LM
AS
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l:
■ Technology & System ■ Organization & Management ■ Human & Behavior
■ Holistic consideration of all 3 system elements is necessary for sustainable improvement of energy efficiency
Energy Value Stream Mapping S
aski
a R
einh
ardt
sa
skia
.rein
hard
t@iw
b.tu
mde
■ Analyze energy flows of a production site ■ Identify the factory’s key energy consumers and where the
greatest amount of energy is wasted ■ Improve energy efficiency in total
Funding Sources: Institute for Machine Tools and Industrial Management (iwb)
Motivation and Objectives Framework
System Elements Types of Waste
Energy Value Stream Analysis Drawing an Energy Value Stream Map
Energy Value Stream Design Summary and Future Work
■ Overproduction, e.g. use of surplus energy by an inefficient manufacturing system
■ Waiting, e.g. energy used while production is down
■ Transportation, e.g. inefficient transportation of compressed air ■ Inventory, e.g. storing energy in batteries ■ Defects, e.g. the energy which was used
to manufacture a defective product is wasted
■ Motion, e.g. inefficient transportation of goods
■ Unused human talent, e.g. failure to integrate employees when defining energy efficient processes
■ The energy value stream map consists of different modules representing the different manufacturing processes, transportation processes und supply units.
■ Structured and methodological approach ■ Tool for energy visualization ■ Similarity to Lean Production profits from existing
knowledge
■ Apply method in different production environments and improve each step
Cau
se
Influ
ence
• Measure • Visualize • Analyze
System Elements Types of Energy Waste
Energy Value Stream Analysis
• Derive measures • Prioritize • Identify reciprocal effects
Scope of Action Design Kit
Energy Value Stream Design
Implementation
20
10
0 2030 2010 1990 1970
500
250
0 2008 2004 2000 1996
Consumer price index fossil fuels
Producer price index crude oil
Global energy consumption in bn toe/a
• Evalua&on of the energy value stream using analysis methods
• Drawing and visualizing the energy value stream
• Collec&ng data on process parameters, power, temperature, compressed air
Process parameter analysis Energy use over time
StromverbrauchWh
ProzessDurchschnitt/Stückletztes Intervall
Budget/ Stück
▪ Drehen▪ Härten▪ Dampfreinigen▪ Schrumpfen▪ Montage▪ Roboter▪ Druckluft
4.0
3.2
5.0
2.0
0.5
0.8
1.4
16.9
3.8
3.3
4.9
2.4
0.5
0.9
1.2
17.0
StromaufnahmeW
Aktuell3.95
2.82
4.23
3.25
0.31
0.80
1.72
LEP gesamt
StromverbrauchWh
ProzessDurchschnitt/Stückletztes Intervall
Budget/ Stück
▪ Drehen▪ Härten▪ Dampfreinigen▪ Schrumpfen▪ Montage▪ Roboter▪ Druckluft
4.0
3.2
5.0
2.0
0.5
0.8
1.4
16.9
4.0
3.2
5.0
2.0
0.5
0.8
1.4
16.9
3.8
3.3
4.9
2.4
0.5
0.9
1.2
17.0
3.8
3.3
4.9
2.4
0.5
0.9
1.2
17.0
StromaufnahmeWStromaufnahmeW
Aktuell3.95
2.82
4.23
3.25
0.31
0.80
1.72
3.95
2.82
4.23
3.25
0.31
0.80
1.72
LEP gesamt
Measure
Visualize
Analyze
Number of parts [Pcs.] = 18 Power[kW] = 0,4 Temperature [°C]= 728
Conveyor Band 0
PT [Sec.] = 1680
CT[ Sec.] = 54
C/O [Sec.] = 2700
Batch [Pc.]= 6
el. Energy [kWh/Pcs.] = 87
Furnace 0,1
Pictures: BoschRexroth
Source: Thomson Reuters
time
Energy consumption
initial state implementation phase normal operation
Technical Optimization
Operators & Management
LEAN Wastes
Overproduction 1
Transportation 3
4 Inventory
5 Defects
6 Motion
7
Unused Human Talent
Waiting 2
Source: iwb, Lernfabrik für Energieproduktivität
Source: iwb, Lernfabrik für Energieproduktivität
8
Over Processing
• Bar length: Amount of waste heat
Waste heat
• Continuous • State-dependent
Type of Consumption
• Color: Type of energy • Bar length: Amount of energy
Consumption
Process x 1 Legend
Natural gas
Electrical Energy
Space hea&ng
Process heat
Cooling water
Extreme cold
Compressed air 6 bar
Compressed air 12 bar
Waste heat
Continuous
State-dependent
Machining 0,1
PT [Sec.] = 43
CT [Sec.] = 54
C/O [Sec.] = 728
Batch [Pcs.]= 6
Process temp. [°C] = 165
Part temp. [°C]= 65
El. Energy [Wh/Stk.] = 376
Steam [kg/h] = 0
Steam [Bar] = 0
Defects [%] = 0
Inventory [Pcs.] = 0
Compr. air [dm3/s] = 3
Compr. air [Bar] = 6
Basic information
Detailed information
Process Module
Legend: PT: Processing time CT: Cycle time C/O: Change over time
Source: iwb, Lernfabrik für Energieproduktivität
Source: iwb, Lernfabrik für Energieproduktivität Source: iwb, Lernfabrik für Energieproduktivität
Source: iwb, Lernfabrik für Energieproduktivität
Energy Value Stream Design
Waste n
…
Waste 2
Waste 1
Derive measures
Prioritize
Scope of Action Design Kit
Identify reciprocal effects
Waste n …. Waste 3 Waste 2 Waste 1
M 3 M 6 M 8 M 12
M 7
Several measures are derived to eliminate each waste of energy
Measures with negative reciprocal effects are eliminated
Cost threshhold Current operation point Quality threshhold
Processwindow
5
Energy consumption Prod. quantity
25
[Pcs.]
15
10
0 Wednesday Thursday Tuesday Monday
[Wh]
150
50
0 Sunday Saturday Friday
Produced quantity Energy consumption