Chapter 1, Problem 1.82P

The curing press of Example 1.9 involves exposure of the plate to irradiation from an infrared lamp andattendant cooling by convection and radiation exchangewith the surroundings. Alternatively, in lieu of thelamp, heating may be achieved by inserting the plate inan oven whose walls (the surroundings) are maintainedat an elevated temperature.
(a) Consider conditions for which the oven walls areat 200°C, airflow over the plate is characterized by $T_{\infty }=20°\text{C}$ and $h=15{\text{W/m}}^{\text{2}}\cdot \text{K}$ , and the coatinghas an emissivity of $\in =0.5$ , What is the temperature of the plate?
(b) For ambient air temperatures of 20, 40, and 60°C, determine the plate temperature as a function of theoven wall temperature over the range from 150 to250°C. Plot your results, and identify conditions forwhich acceptable curing temperatures between 100 and 110°C may be maintained.