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

Less can be more Most important data? Remove extraneous data Don’t be afraid of multiple graphs

~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 reboiler Residual heat? No activity in the condenser

~500W ~1000W ~2000W ~3100W Tray 1 Reboiler

Close but not quite

~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