Annealing is a process by which steel is reheated and then cooled to make it less brittle. Consider the reheat stage for a 100-mm-thick teel plate (p = 7830 kg/m³, c = 550 J/kg-K, k = 48 W/m-K), which is initially at a uniform temperature of T; = 140°C and is to be heated to a minimum temperature of 550°C. Heating is effected in a gas-fired furnace, where products of combustion at T = 800°C naintain a convection coefficient of h = 250 W/m²-K on both surfaces of the plate. How long should the plate be left in the furnace? The plate should be left in the furnace for sec
Annealing is a process by which steel is reheated and then cooled to make it less brittle. Consider the reheat stage for a 100-mm-thick teel plate (p = 7830 kg/m³, c = 550 J/kg-K, k = 48 W/m-K), which is initially at a uniform temperature of T; = 140°C and is to be heated to a minimum temperature of 550°C. Heating is effected in a gas-fired furnace, where products of combustion at T = 800°C naintain a convection coefficient of h = 250 W/m²-K on both surfaces of the plate. How long should the plate be left in the furnace? The plate should be left in the furnace for sec
Principles of Heat Transfer (Activate Learning with these NEW titles from Engineering!)
8th Edition
ISBN:9781305387102
Author:Kreith, Frank; Manglik, Raj M.
Publisher:Kreith, Frank; Manglik, Raj M.
Chapter1: Basic Modes Of Heat Transfer
Section: Chapter Questions
Problem 1.60P: 1.60 Two electric resistance heaters with a 20 cm length and a 2 cm diameter are inserted into a...
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Take note that both sides of the plate are exposed to convection.
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