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Problem 1 (30pts.): A silver plate of thickness 0.5m and surface area As-1000m2 on each side,...
Supplemental Problem 2.003 A large plate of thickness 2L is at a uniform temperature of Tỉ-190°C,...
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Supplemental Problem 2.003 A large plate of thickness 2L is at a uniform temperature of Tỉ-190°C, when it is suddenly quenched by dipping it in a liquid bath of temperature To Heat transfer to the liquid is characterized by the convection coefficient h. Assume x = 0 corresponds to the midplane of the wall -20°C (a) If h = 100 w/m2, K, what is the heat flux atx = L and t = 0?...
An aluminum plate with a thickness of L=5 mm is mounted in a horizontal position, and...
An aluminum plate with a thickness of L=5 mm is mounted in a horizontal position, and its bottom surface is well insulated. A special, thin coating (with emissivity and solar absorptivity of 0.25) is applied to the top surface. The density ρ and specific heat c of aluminum are known to be 2700 kg/m3 and 900 J/kg · K, respectively. Consider conditions for which the plate is initially at a temperature of ??????=25 °C and its top surface is suddenly...
PRINTER VERSION BACK NEXT RCES Supplemental Problem 7.001 A flat plate of width 1 m is...
PRINTER VERSION BACK NEXT RCES Supplemental Problem 7.001 A flat plate of width 1 m is maintained at a uniform surface temperature of T,-160°C by using independently controlled, heat-generating rectangular modules of thickness a 10 mm and length b 50 mm. Each module is insulated from its neighbors, as well as on its back side. Atmospheric air at 25°C flows over the plate at a velocity of 30 m/s. The thermophysical properties of the module are k5.2 W/m K, cp...
Air at T=25°C and pressure P=1 bar flows over a square plate with a velocity V=1...
Air at T=25°C and pressure P=1 bar flows over a square plate with a velocity V=1 m/s. This plate has a length L= 1 m and it is heated over its entire length; the plate temperature is constant Tp=100°C. The following data are given. For air: dynamic viscosity: mu = 1.9*10–5 kg/(m.s); density: rho = 1.05 kg/m3; conductivity k = 0.03 W/(m K); Specific heat Cp = 1.007 kJ/(kg K); Prandtl number Pr = 0.7 For laminar flow over a...
A large stainless steel (AISI 316) plate having a thickness of 5 mm is initially at...
A large stainless steel (AISI 316) plate having a thickness of 5 mm is initially at a temperature of 70°C, and both sides of the plate are suddenly exposed to a convection environment at 20°C with the heat transfer coefficient of h= 800 W/m 2 oC. What will be the center and surface temperatures of the plate after 10 s? For stainless steel (AISI 316), α = 348x10-6 m2/s and k = 13.4 W/m K.
4- A steel strip of thickness 6-12 mm is annealed by passing it through a large fumace whose wall...
4- A steel strip of thickness 6-12 mm is annealed by passing it through a large fumace whose walls are maintained at a temperature Tw corresponding to that of combustion gases flowing through the fumace (Iw Tp). The stip, whose density, spcific thermal conductivity, and emissivity are 79 kg/m3, cp -640 J/kg K, k 30 W/m K and 0.7, respectively, is to be heated from 300°C to 600°C Furnace walls, Combustion gases For a unifom convection coefficient of h-100 W/m2...
Consider a rectangular fin (k = 180 W/m-K) of length L =10 mm, thickness i =1...
Consider a rectangular fin (k = 180 W/m-K) of length L =10 mm, thickness i =1 mm, and width w» t. The base temperature of the finis Ty = 150°C, and the finis exposed to a fluid of temperature T, =25°C. Assuming a uniform convection coefficient of h = 110 W/m2.K over the entire fin surface, determine the fin heat transfer rate per unit width 4; efficiency ng: effectiveness es, thermal resistance per unit width and the tip temperature T...
Consider the base plate of a 1200-W household iron that has a thickness of L =...
Consider the base plate of a 1200-W household iron that has a thickness of L = 0.5-cm, base area of A= 300-cm', and thermal conductivity of k = 15-W/m-C". The inner surface of the base plate is subjected to a uniform heat flux generated by the resistance heaters inside, and the outer surface losses heat to the surroundings at T = 20°C by convection. Taking the convection heat transfer coefficient to be h = 80-W/m--°C obtain an expression for the...
Supplemental Problem 7.001 A flat plate of width 1 m is maintained at a uniform surface temperatu...
Supplemental Problem 7.001 A flat plate of width 1 m is maintained at a uniform surface temperature of Ts = 160°C by using independently of thickness a 12 mm and length b 50 mm. plate at a velocity of 30 m/s. The thermophysical properties of the module are k Reynolds number is 5x105 rectangular modules Each module is insulated from its neighbors, as well as on its back side. Atmospheric air at 25%C flows over the 5.2 w/m-K, cp320 J/kg...
3 (40 pts) An infinitely large plate of thickness 20 cm is insulated at the lower...
3 (40 pts) An infinitely large plate of thickness 20 cm is insulated at the lower surface. Within the plate, heat is uniformly generated at a rate égen = 5 x 104 W/m2. The temperature of the air above the plate is known as Tair = (1 - sini z), where 1 = 3000 m and the origin of the coordinate system z starts from the upper surface of the plate. The physical properties of the plate: p = 7.9...
I will rate. Thanks so much
Supplemental Problem 2.003 A large plate of thickness 2L is at a uniform temperature of Tỉ-190°C, when it is suddenly quenched by dipping it in a liquid bath of temperature To Heat transfer to the liquid is characterized by the convection coefficient h. Assume x = 0 corresponds to the midplane of the wall -20°C (a) If h = 100 w/m2, K, what is the heat flux atx = L and t = 0?...
PRINTER VERSION BACK NEXT RCES Supplemental Problem 7.001 A flat plate of width 1 m is maintained at a uniform surface temperature of T,-160°C by using independently controlled, heat-generating rectangular modules of thickness a 10 mm and length b 50 mm. Each module is insulated from its neighbors, as well as on its back side. Atmospheric air at 25°C flows over the plate at a velocity of 30 m/s. The thermophysical properties of the module are k5.2 W/m K, cp...
A large stainless steel (AISI 316) plate having a thickness of 5 mm is initially at a temperature of 70°C, and both sides of the plate are suddenly exposed to a convection environment at 20°C with the heat transfer coefficient of h= 800 W/m 2 oC. What will be the center and surface temperatures of the plate after 10 s? For stainless steel (AISI 316), α = 348x10-6 m2/s and k = 13.4 W/m K.
4- A steel strip of thickness 6-12 mm is annealed by passing it through a large fumace whose walls are maintained at a temperature Tw corresponding to that of combustion gases flowing through the fumace (Iw Tp). The stip, whose density, spcific thermal conductivity, and emissivity are 79 kg/m3, cp -640 J/kg K, k 30 W/m K and 0.7, respectively, is to be heated from 300°C to 600°C Furnace walls, Combustion gases For a unifom convection coefficient of h-100 W/m2...
Consider a rectangular fin (k = 180 W/m-K) of length L =10 mm, thickness i =1 mm, and width w» t. The base temperature of the finis Ty = 150°C, and the finis exposed to a fluid of temperature T, =25°C. Assuming a uniform convection coefficient of h = 110 W/m2.K over the entire fin surface, determine the fin heat transfer rate per unit width 4; efficiency ng: effectiveness es, thermal resistance per unit width and the tip temperature T...
Consider the base plate of a 1200-W household iron that has a thickness of L = 0.5-cm, base area of A= 300-cm', and thermal conductivity of k = 15-W/m-C". The inner surface of the base plate is subjected to a uniform heat flux generated by the resistance heaters inside, and the outer surface losses heat to the surroundings at T = 20°C by convection. Taking the convection heat transfer coefficient to be h = 80-W/m--°C obtain an expression for the...
Supplemental Problem 7.001 A flat plate of width 1 m is maintained at a uniform surface temperature of Ts = 160°C by using independently of thickness a 12 mm and length b 50 mm. plate at a velocity of 30 m/s. The thermophysical properties of the module are k Reynolds number is 5x105 rectangular modules Each module is insulated from its neighbors, as well as on its back side. Atmospheric air at 25%C flows over the 5.2 w/m-K, cp320 J/kg...
3 (40 pts) An infinitely large plate of thickness 20 cm is insulated at the lower surface. Within the plate, heat is uniformly generated at a rate égen = 5 x 104 W/m2. The temperature of the air above the plate is known as Tair = (1 - sini z), where 1 = 3000 m and the origin of the coordinate system z starts from the upper surface of the plate. The physical properties of the plate: p = 7.9...
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Learning Outcomes:
Upon the successful completion of this module, you should
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