graphical communication ben dalton utc ench 435 september 16, 2008
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Graphical Communication
Ben Dalton
UTC ENCH 435
September 16, 2008
Introduction
Graphics can be confusing Sometimes less is more Focus on the point being made Best graphics are self-explanatory Break up complicated data to make it
easier to digest
Jumbled Mess
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110
0 10 20 30 40 50 60
Time (min)
Te
mp
era
ture
(°C
)
0
500
1000
1500
2000
2500
3000
3500
Re
bo
ile
r P
ow
er
(W)
Reboiler Power
Tray 1
Reflux
Not Steady State
~2000W
~1000W
~3100W
~500W
Less can be more
Most important data?
Remove extraneous data
Don’t be afraid of multiple graphs
Engineering
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Time (sec)
Inp
ut
(%)
0
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3500
Engineering
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Time (sec)
Inp
ut
(%)
0
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3500
~3100W
~2000W
~1000W
~500W
Observations at ~3100 W
Vigorous boiling in reboiler and all trays
Rapid condensation
Leaking water and steam around seal
Observations at ~2000 W
Steady boiling in reboiler and all trays
Moderate condensation
Seal only leaking small amount of steam
Observations at ~1000 W
Gentle boiling in reboiler and most trays
Boiling appeared to have stopped in tray 1
Very little activity in the condenser
Seal stopped leaking
Observations at ~500W
No boiling in any of the trays
Slight boiling in reboilerResidual heat?
No activity in the condenser
Engineering
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Time (sec)
Inp
ut
(%)
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Engineering
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Time (sec)
Inp
ut
(%)
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3500
~500W~1000W
~2000W
~3100W
Tray 1
Reboiler
Close but not quite
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0 10 20 30 40 50 60
Time (min)
Te
mp
era
ture
(°C
)
0
500
1000
1500
2000
2500
3000
3500
Re
bo
iler
Po
we
r (W
)
Reboiler Power
Cooling Water Supply
Cooling Water Return
~2000W
~3100W
~1000W
~500W
ΔT = 6.7
ΔT = 3.7
ΔT = 0.1ΔT = 0.6
Engineering
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Time (sec)
Inp
ut
(%)
0
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1000
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3500
Engineering
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20 30 40 50 60 70 80 90 100 110
Time (sec)
Inp
ut
(%)
0
500
1000
1500
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3000
3500
~3100W
~2000W
~1000W~500W
Cooling Water Supply
Cooling Water Return
ΔT = 6.7
ΔT = 3.7
ΔT = 0.6
Summary
Graphics can confuse audience
Done properly, graphics convey a lot of information
Useful for illustrating your words
Big point sizes and high contrast