A plate of thickness L is initially at uniform temperature Ti. A second plate of the same materia...
A plate of thickness L is initially at uniform temperature Ti. A second plate of the same material of thickness L2 is initially at uniform temperature T2. At t20 the two plates are fastened together with a perfect contact at the interface. Simultaneously, the surface of one plate is heated with uniform flux qo and the opposite surface begins to exchange heat by convection with the surroundings. The heat transfer coefficient is h and the ambient temperature is T Determine the one-dimensional transient temperature distribution in the two plates
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A plate of thickness L is initially at uniform temperature Ti. A second plate of the same materia...
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...
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...
izon- e and sur- osed loss calm ffec- e the ce to 1-106 A nonmetal plate...
izon- e and sur- osed loss calm ffec- e the ce to 1-106 A nonmetal plate (k = 0.05 W/m.K) and an ASME SA-240 stainless steel plate (k = 15 W/m-K) are bolted together by ASTM B21 naval brass bolts. Both plates have a thickness of 38 mm, and the brass bolts are bolted through both plates. The bottom steel plate surface (surface 1) is subjected to a uniform heat flux of 200 W/m². The top non- metal plate surface...
3.36 A straight rectangular fin of leneth L, thickness t and width W The upper surface...
3.36 A straight rectangular fin of leneth L, thickness t and width W The upper surface being heated at a uniform flux q0.The heat transfer coefficient at the upper surface is hu and that of the lower surface is h. The ambient fluid teperature qo is To. At the base the heat transfer rate is o The two side surfaces and the tip are t insulated. Formulate the fin conduction equation and write the boundary conditions.
The base plate of an iron has a thickness ofL = 7 mm and is made...
The base plate of an iron has a thickness ofL = 7 mm and is made from an aluminum alloy (-2800 kg/m, c-900 J/kg . K, k-180 W/m . K, ε- 0.80). An electric resistance heater is attached to the inner surface of the plate, while the outer surface is exposed to ambient air and large surroundings at T-7,-25°C. The areas of both the inner and outer surfaces are As 0.040 m2. An approximately uniform heat flux of is applied...
Supplemental Problem 2.003 A large plate of thickness 2L is at a uniform temperature of Tỉ-190°C,...
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?...
SKMM 3433 A solid body which is initially at a uniform temperature Tİ is exposed to an ambient air at temperature Te. Explain how you would determine the maximum amount of heat that can be transfe...
SKMM 3433 A solid body which is initially at a uniform temperature Tİ is exposed to an ambient air at temperature Te. Explain how you would determine the maximum amount of heat that can be transferred to the body. What does this amount of heat represent? Q2. (a) (5 marks) A wall ofa room is made of lightweight concrete material (ρ= 1600 kg/m.に0.79 W/m K and cp 0.84 kJ/kg K) with a thickness of 150 mm. Initially the wall is...
QUESTION FOUR Consider the base plate of an 900-W household iron with a thickness of L-0.6...
QUESTION FOUR Consider the base plate of an 900-W household iron with a thickness of L-0.6 cm, base area of A-160 cm2, and the thermal conductivity of k-60 W/m.K. The inner surface of the base plate is subjected to uniform heat flux generated by the resistance heaters inside. When stea dy operating itions are reached, the outer surface temperature of the plate is measured to be 112 C. Disregarding any heat loss through the upper part of the iron, (a)...
A 50 mm thick steel plate (AISI347) has a uniform heat flux applied to its bottom...
A 50 mm thick steel plate (AISI347) has a uniform heat flux
applied to its bottom surface by a heater. The heater is in contact
with the steel plate, and the interface between the heater and
steel has a contact resistance of 2.0 x 10-4
m2*K/W. The top surface of the plate is exposed to
surrounding air (T = 20oC, h = 10 W/m2*K) and
exchanges radiation with surroundings at Tsur =
10oC. The emissivity of the plate is 0.85....
P1 (50 pts.) - A large plane wall has a thickness L-60 cm and thermal conductivity...
P1 (50 pts.) - A large plane wall has a thickness L-60 cm and thermal conductivity k 25 W/m-K. On the left surface (x-0), it is subjected to a uniform heat flux qo while the surface temperature To is constant. On the right surface, it experiences convection and radiation heat transfer while the surface temperature is TL-225°C and the surrounding temperature is 25°C. The emissivity and the convection heat transfer coefficient on the right surface are 0.7 and 15 W/m2-K,...
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...
izon- e and sur- osed loss calm ffec- e the ce to 1-106 A nonmetal plate (k = 0.05 W/m.K) and an ASME SA-240 stainless steel plate (k = 15 W/m-K) are bolted together by ASTM B21 naval brass bolts. Both plates have a thickness of 38 mm, and the brass bolts are bolted through both plates. The bottom steel plate surface (surface 1) is subjected to a uniform heat flux of 200 W/m². The top non- metal plate surface...
3.36 A straight rectangular fin of leneth L, thickness t and width W The upper surface being heated at a uniform flux q0.The heat transfer coefficient at the upper surface is hu and that of the lower surface is h. The ambient fluid teperature qo is To. At the base the heat transfer rate is o The two side surfaces and the tip are t insulated. Formulate the fin conduction equation and write the boundary conditions.
The base plate of an iron has a thickness ofL = 7 mm and is made from an aluminum alloy (-2800 kg/m, c-900 J/kg . K, k-180 W/m . K, ε- 0.80). An electric resistance heater is attached to the inner surface of the plate, while the outer surface is exposed to ambient air and large surroundings at T-7,-25°C. The areas of both the inner and outer surfaces are As 0.040 m2. An approximately uniform heat flux of is applied...
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?...
SKMM 3433 A solid body which is initially at a uniform temperature Tİ is exposed to an ambient air at temperature Te. Explain how you would determine the maximum amount of heat that can be transferred to the body. What does this amount of heat represent? Q2. (a) (5 marks) A wall ofa room is made of lightweight concrete material (ρ= 1600 kg/m.に0.79 W/m K and cp 0.84 kJ/kg K) with a thickness of 150 mm. Initially the wall is...
QUESTION FOUR Consider the base plate of an 900-W household iron with a thickness of L-0.6 cm, base area of A-160 cm2, and the thermal conductivity of k-60 W/m.K. The inner surface of the base plate is subjected to uniform heat flux generated by the resistance heaters inside. When stea dy operating itions are reached, the outer surface temperature of the plate is measured to be 112 C. Disregarding any heat loss through the upper part of the iron, (a)...
A 50 mm thick steel plate (AISI347) has a uniform heat flux
applied to its bottom surface by a heater. The heater is in contact
with the steel plate, and the interface between the heater and
steel has a contact resistance of 2.0 x 10-4
m2*K/W. The top surface of the plate is exposed to
surrounding air (T = 20oC, h = 10 W/m2*K) and
exchanges radiation with surroundings at Tsur =
10oC. The emissivity of the plate is 0.85....
P1 (50 pts.) - A large plane wall has a thickness L-60 cm and thermal conductivity k 25 W/m-K. On the left surface (x-0), it is subjected to a uniform heat flux qo while the surface temperature To is constant. On the right surface, it experiences convection and radiation heat transfer while the surface temperature is TL-225°C and the surrounding temperature is 25°C. The emissivity and the convection heat transfer coefficient on the right surface are 0.7 and 15 W/m2-K,...
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