ISSN:
0032-3888
Keywords:
Chemistry
;
Chemical Engineering
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
,
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
,
Physics
Notes:
Temperature was calculated as a function of lateral and axial position within a thin poly(ethylene terephthalate) (PET) tape traveling alternately over a heated roll and through air. The system consists of a pair of rolls which are internally heated and located in an oven. The centers of the rolls are ten inches apart and the tape makes eight wraps around the roll pair. Three sources of heat transfer to the tape are considered: convection and radiation from the heated rolls, convection from the air, and radiation from the hot oven walls. Calculations were carried out for oven wall temperatures of 100 and 1000°C, air temperatures of 100 and 205°C, and roll surface temperatures of 180 and 235°C. The computations generally indicate that after several wraps the temperature of the outside surface of the tape (i.e., the surface that does not contact the rolls) is essentially the same each time the tape leaves the roll. However, this temperature changes us the tape then travels through the adjacent, downstream air space. Although there is a temperature gradient across the tape, the temperature of the inside surface (i.e., the side that contacts the rolls) exhibits behavior similar to that of the outside surface.
Additional Material:
12 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/pen.760181209
Permalink
