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20-33 Consider a thin 16-cm-long and 20-cm-wide hori- zontal plate suspended in air at 20°C. The plate is equipped with
Posted: Mon May 09, 2022 2:35 pm
by answerhappygod
- 20 33 Consider A Thin 16 Cm Long And 20 Cm Wide Hori Zontal Plate Suspended In Air At 20 C The Plate Is Equipped With 1 (46.47 KiB) Viewed 21 times
20-33 Consider a thin 16-cm-long and 20-cm-wide hori- zontal plate suspended in air at 20°C. The plate is equipped with electric resistance heating elements with a rating of 20 W. Now the heater is turned on and the plate temperature rises. Determine the temperature of the plate when steady operating conditions are reached. The plate has an emissiv- ity of 0.90 and the surrounding surfaces are at 17°C. As an initial guess, assume a surface temperature of 50°C. Is this a good assumption? Air To = 20°C L = 16 cm Resistance wire FIGURE P20-33