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Problem 1 (25 points) In an experiment to measure heat transfer coefficients, a very thin foil...
1. Heat transfer analysis of a special-purpose panel is to be performed. The temperatures at the...
1. Heat transfer analysis of a special-purpose panel is to be performed. The temperatures at the inner and outer surfaces of the panel measure 30°C and 22°C, respectively. The dimension of the panel is 2.9 m wide, 1.3 m high and 0.40 cm thick. Its thermal conductivity is 0.13 W/m·°C. Heat is lost from the outer surface by convection and radiation. The convective heat transfer coefficient is 23 W/m2 ·°C and an ambient temperature measures 13°C. Determine (a) the fraction...
QUESTION 4 For the convection heat transfer problem shown in the following figure, (a) write the finite element m...
QUESTION 4 For the convection heat transfer problem shown in the following figure, (a) write the finite element model related to cach of the four rectangular elements, (b) write the finite clement algebraic equation for the unknown nodal temperatures at Node 5, Assume that the thermal conductivity of the material is k-5 W(m.C), the convection heat transfer coefficient on the left surface is -28 W/(m C), and the internal heat generation is zero. (25 pts) Use the following sense and...
ASSIGNMENT 1 BMM35131920/1 QUESTION 3 [10 Marks] a) Briefly discuss the following terms in heat transfer:...
ASSIGNMENT 1 BMM35131920/1 QUESTION 3 [10 Marks] a) Briefly discuss the following terms in heat transfer: i. Blackbody ii. Absorptivity iii. Convection iv. Specific heat v. Thermal conductivity (5 Marks) b) An industrial galvanized pipe (Figure Q3) that carries SiO2 nanofluid as cooling liquid passes through a factory in which the air is at 27°C. The outside diameter of the pipe is 75 mm, and its surface temperature and emissivity are 200 °C and 0.8, respectively. If the coefficient associated...
During its manufacture, plate glass at 600°C is cooled by passing air over its surface such...
During its manufacture, plate glass at 600°C is cooled by passing air over its surface such that the convection heat transfer coefficient is h. To prevent cracking, it is known that the temperature gradient must not exceed 15 °C/mm at any point in the glass during the cooling process. The thermal conductivity of the glass is 1.4 W/mK and its surface emissivity is 0.75. The temperature of the air that is used for the cooling is 315 °C. Assume that...
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,...
I need Q5 Heat transfer Problem(.) In an experiment, it is found that the local convection...
I need Q5
Heat transfer
Problem(.) In an experiment, it is found that the local convection coefficient on a flat plate of length L is given by: (10 marks) h,-o923 (k/x){(V. ?.?)/p)as, where k, V, p, and ? are constants. Determine the average convection coefficient over the plate h Problem (5) (10 marks) Milk is flowing with a mass flow rate m 0.6 kg/s, in a pipe with internal diameter - 3 cm. Its initial temperature is 50 °C and...
Heat transfer
Consider a spherical container of inner radius r1, outer radius r2, and thermal conductivity k. Express the boundary condition on the inner surface of thecontainer for steady one-dimensional conduction for the following cases:(i) specified temperature of 50°C,[2 Marks](ii) specified heat flux of 45 W/m2 toward the center,[2 Marks](iii) convection to a medium at T∞ with a heat transfer coefficient of h.[2 Marks]
Problem : A cryogenic flui d is flowing in a 304 SS pipe. The pipe is...
Problem
:
A cryogenic flui
d is flowing in a
304 SS
pipe.
The pipe is insulated
on its outside surface
with
6
-
mm thick,
evacuated,
aluminum foil/glass mat insulation.
(“Evacuated” means a partial vacuum is drawn on the
insulation to
remove air that would otherwise fill
pores inside the insulation.)
The pipe
inside diameter
is 127 mm; it’s outside diameter is 138 mm.
The
fluid temperature is
-
173
o
C
.
T
he
air temperature
outside the...
3. Heat Transfer Mechanism: (Total points 30 Suppose copper pipe in a parabolic concentrator is c...
3. Heat Transfer Mechanism: (Total points 30 Suppose copper pipe in a parabolic concentrator is carrying heat transfer fluid (HTF) of 450 °C. The ambient temperature is 25 °C. The pipe has a diameter of 5 cm but the pipe wall thickness is 3 mm. Determine the rate of heat conduction through the pipe wall per unit area of wa Copper has thermal conductivity k-400 w/m.К. (Points 10) If the pipe temperature is same as that of fluid inside, calculate...
It's a heat transfer question. The chip is square with dimensions 15mm by 15mm and 5mm...
It's a heat transfer question. The chip is square with dimensions 15mm by 15mm and 5mm thickness with constant temperature Tc = 87 degrees C. At the top surface, 20 pin fins with convective ends are attached to the chip. The diameter of each fin, Dp = 1.5 mm, the length of each fin, Lp = 15 mm, and the thermal conductivity Kp = 400W/mK (For chip and fins). The convection coefficient, h = 50 W/(m2·K), and fluid temperature of...
QUESTION 4 For the convection heat transfer problem shown in the following figure, (a) write the finite element model related to cach of the four rectangular elements, (b) write the finite clement algebraic equation for the unknown nodal temperatures at Node 5, Assume that the thermal conductivity of the material is k-5 W(m.C), the convection heat transfer coefficient on the left surface is -28 W/(m C), and the internal heat generation is zero. (25 pts) Use the following sense and...
ASSIGNMENT 1 BMM35131920/1 QUESTION 3 [10 Marks] a) Briefly discuss the following terms in heat transfer: i. Blackbody ii. Absorptivity iii. Convection iv. Specific heat v. Thermal conductivity (5 Marks) b) An industrial galvanized pipe (Figure Q3) that carries SiO2 nanofluid as cooling liquid passes through a factory in which the air is at 27°C. The outside diameter of the pipe is 75 mm, and its surface temperature and emissivity are 200 °C and 0.8, respectively. If the coefficient associated...
During its manufacture, plate glass at 600°C is cooled by passing air over its surface such that the convection heat transfer coefficient is h. To prevent cracking, it is known that the temperature gradient must not exceed 15 °C/mm at any point in the glass during the cooling process. The thermal conductivity of the glass is 1.4 W/mK and its surface emissivity is 0.75. The temperature of the air that is used for the cooling is 315 °C. Assume that...
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,...
I need Q5
Heat transfer
Problem(.) In an experiment, it is found that the local convection coefficient on a flat plate of length L is given by: (10 marks) h,-o923 (k/x){(V. ?.?)/p)as, where k, V, p, and ? are constants. Determine the average convection coefficient over the plate h Problem (5) (10 marks) Milk is flowing with a mass flow rate m 0.6 kg/s, in a pipe with internal diameter - 3 cm. Its initial temperature is 50 °C and...
Problem
:
A cryogenic flui
d is flowing in a
304 SS
pipe.
The pipe is insulated
on its outside surface
with
6
-
mm thick,
evacuated,
aluminum foil/glass mat insulation.
(“Evacuated” means a partial vacuum is drawn on the
insulation to
remove air that would otherwise fill
pores inside the insulation.)
The pipe
inside diameter
is 127 mm; it’s outside diameter is 138 mm.
The
fluid temperature is
-
173
o
C
.
T
he
air temperature
outside the...
3. Heat Transfer Mechanism: (Total points 30 Suppose copper pipe in a parabolic concentrator is carrying heat transfer fluid (HTF) of 450 °C. The ambient temperature is 25 °C. The pipe has a diameter of 5 cm but the pipe wall thickness is 3 mm. Determine the rate of heat conduction through the pipe wall per unit area of wa Copper has thermal conductivity k-400 w/m.К. (Points 10) If the pipe temperature is same as that of fluid inside, calculate...
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