3. A plate 0.3 m long and 0.1 m wide, with a thickness of 12 mm is made from stainless steel (k = 16 W/m °C), the top surface is exposed to an airstream of temperature 20 °C. In an experiment, the plate is heated by an electrical heater (also 0.3 m by 0.2 m) positioned on the underside of the plate and the temperature of the plate adjacent to the heater is maintained at 100 °C. A voltmeter and ammeter are connected to the heater and these read 200 V and 0.25 A, respectively. Assuming that the place is perfectly insulated on all sides except the top surface, what is the convection heat transfer coefficient?
3. A plate 0.3 m long and 0.1 m wide, with a thickness of 12 mm is made from stainless steel (k = 16 W/m °C), the top surface is exposed to an airstream of temperature 20 °C. In an experiment, the plate is heated by an electrical heater (also 0.3 m by 0.2 m) positioned on the underside of the plate and the temperature of the plate adjacent to the heater is maintained at 100 °C. A voltmeter and ammeter are connected to the heater and these read 200 V and 0.25 A, respectively. Assuming that the place is perfectly insulated on all sides except the top surface, what is the convection heat transfer coefficient?
Introduction to Chemical Engineering Thermodynamics
8th Edition
ISBN:9781259696527
Author:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Publisher:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Chapter1: Introduction
Section: Chapter Questions
Problem 1.1P
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Transcribed Image Text:3. A plate 0.3 m long and 0.1 m wide, with a thickness of 12 mm is made from stainless
steel (k = 16 W/m °C), the top surface is exposed to an airstream of temperature 20 °C. In
an experiment, the plate is heated by an electrical heater (also 0.3 m by 0.2 m) positioned
on the underside of the plate and the temperature of the plate adjacent to the heater is
maintained at 100 °C. A voltmeter and ammeter are connected to the heater and these
read 200 V and 0.25 A, respectively. Assuming that the place is perfectly insulated on all
sides except the top surface, what is the convection heat transfer coefficient?
W = 0.1 m
T; 20°C
L= 0.3 m
T2
k =16 W/mK
t = 0.012 m
T2
insulated
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