BY: David PendletonAnd Timothy Pickett

PURPOSE•Compare lunch bag materials by experimentallymeasuring the transient temperature response of a potato and comparing it with an analytical model

We used two types of bags:PolyvinylChloride and Polyurethane

RESULTSRESULTS

Urethane vs. PVC (Experimental)

20

22

24

26

28

30

32

34

0 200 400 600 800 1000

time(s)

Polyvinylchloride

Polyurethane

PVC Experimental vs. Analytical

20

25

30

35

0 500 1000

time (s)

Te

mp

(C

elc

ius

)

Experimental

Analytical

Urethane Experimental vs. Analytical

20

25

30

35

0 500 1000

Time (s)

Te

mp

(C

elc

ius

) Experimental

Analytical

Urethane vs. PVC (Analytical)

20

25

30

35

0 500 1000

urethane

pvc

CONCLUSIONCONCLUSION

• The bigger the bag, the betterThe bigger the bag, the better

• Urethane maintains food temperature Urethane maintains food temperature longerlonger