Homework Answers
Add Answer to:
layer2 layer 1 TI Pipe Ti T2 To Heat is transferred from a fluid in the...
A 6 in. schedule 80 steel pipe (OD=6.62 in.) will be used to transport 450◦F steam...
A 6 in. schedule 80 steel pipe (OD=6.62 in.) will be used to transport 450◦F steam from a boiler house to a new process unit. The pipe will be buried at a depth of 3 ft (to the pipe centerline). The soil at the plant site has an average thermal conductivity of 0.4 Btu/h · ft · ◦F and the minimum expected ground surface temperature is 20◦F. Estimate the rate of heat loss per foot of pipe length for the...
1. A ¾ inch (nominal), Schedule 40, mild steel pipe carries 40 psia steam through a...
1. A ¾ inch (nominal), Schedule 40, mild steel pipe carries 40 psia steam through a room having an air temperature of 80°F. The pipe is covered with a 0.125 ft thick layer of fiberglass insulation having a thermal conductivity of 0.037 Btu/(h ft ‘F). The hi value on the steam side of the pipe is 1000 Btu/h ft2 °F. The ho value on the outside of the insulation is 2.0 Btu/(h ft2 ’F). For the mild steel, k=26Btu/(ft H...
QUESTION 1 (10 marks) a) Write the Newton's law of heat convection in fluid using convection heat transfer coef...
QUESTION 1 (10 marks) a) Write the Newton's law of heat convection in fluid using convection heat transfer coefficient, h (Wm2.K). Please explain the equation in terms of its driving force and resistancC (2 marks) (POUCOI/C2) b) Define the heat transfer rate, q,by inside and outside convection and wall conduction considering a stainless steel cylindrical pipe (inside radius, ri and outer radius, ) with fiberglass insulator (radius, s) in ą steady state condition as shown in Figure Q11 Steam with...
Heat Transfer Problems 1. A window pane (1/8 inch thick) in an old house owned by...
Heat Transfer
Problems 1. A window pane (1/8 inch thick) in an old house owned by a professor is 3 ft. by 4 ft. He likes to be warm in the winter so the inside temperature is kept at 70 °F even when the outside temperature is 10 •F. For this problem assume the inside and outside temperatures are for the window surface. How much heat is transferred through the window (k=.54 BTU/hr ft ° F)? 2. A small heated...
please answer my heat transfer problem thank you!! heat transfer problem a furnace wall is constructed...
please answer my heat transfer problem thank you!! heat transfer problem a furnace wall is constructed of firrebrick 6in thick. The temperature of the wall is 1300F, and the T outside of the wall is 175 F. If the mean thermal conductivity under these conditions is 0.17 BTU/h-ft-F, what is the rate of heat loss through a 10 ft2 wall of the surface? ans. 3825 BTU/hr
Help with a-g, answers given. Show work The inner pipe of a double-pipe heat exchanger has...
Help with a-g, answers given. Show work
The inner pipe of a double-pipe heat exchanger has an OD of 1.9 in. and contains 36 rectangular fins of the type shown in the sketch below. The fins are made of steel (k 34.9 Btu/h ft. "F) and are 0.5 in. high and 0.035 in. thi temperature is 250°F and the fluid in the annulus surrounding the fins is at 150°F with a heat-transfer c ck. The pipe wall ft2 、 c,...
(2 pts) Heat is transferred from a hot fluid (temperature T1 and heat transfer coefficient h2)...
(2 pts) Heat is transferred from a hot fluid (temperature T1 and heat transfer coefficient h2) through a plane wall of thickness 8, surface area A and the thermal conductivity k. The thermal resistance for the set up is + (a) AC ) (b) A (i + + ) (c) 2 (na + + n2) (d) A (na + b +h2) (2 pts) An increase in convective heat transfer coefficient over a fin will (a) increase effectiveness (b) decrease effectiveness...
1) 1.5 A composite refrigerator wall is composed of zin. of corkboard sandwiched between a ²...
1) 1.5 A composite refrigerator wall is composed of zin. of corkboard sandwiched between a ² inch thick layer of oak and a #" thick aluminum lining on the inner surface. If hin 2 Btu/hr fe of and hout Bte/urff of; a) Draw the thermal circuit, and find total. b) Assume Too in = 20°F and Too out 90°r. Calculate the heat flux (9") through the walls (Btu/hr. ft) () Find Ti, To, To, and T4 KAR- 136 hout 15...
ro ri = 0.05m 1 A pipe with surface temperature T1 = 380 K is wrapped...
ro ri = 0.05m 1 A pipe with surface temperature T1 = 380 K is wrapped with 0.09 m of glass fiber pipe insulation. The outer surface temperature of the insulation, T2 is equal to 354 K and its emissivity is equal to 0.74. The insulation is also subject to natural convection with a bulk fluid temperature of 298 K and h = 1W/m2-K. For a pipe length of 100 m, and assuming that the room temperature is similar to...
(8 marks) The heat generated from power dissipation of a silicon chip is transferred by convection...
(8 marks) The heat generated from power dissipation of a silicon chip is transferred by convection heat transfer from top and bottom of the chip. Top surface of the chip is covered by a 4-mm thick aluminum cover (k = 240 W/m.k) which is subjected to convection heat transfer on its top surface. Bottom surface of the chip is directly subjected to convection. Convection heat transfer coefficient of fluid is h = 1000 W/m²K and To = 25 °C. The...
QUESTION 1 (10 marks) a) Write the Newton's law of heat convection in fluid using convection heat transfer coefficient, h (Wm2.K). Please explain the equation in terms of its driving force and resistancC (2 marks) (POUCOI/C2) b) Define the heat transfer rate, q,by inside and outside convection and wall conduction considering a stainless steel cylindrical pipe (inside radius, ri and outer radius, ) with fiberglass insulator (radius, s) in ą steady state condition as shown in Figure Q11 Steam with...
Heat Transfer
Problems 1. A window pane (1/8 inch thick) in an old house owned by a professor is 3 ft. by 4 ft. He likes to be warm in the winter so the inside temperature is kept at 70 °F even when the outside temperature is 10 •F. For this problem assume the inside and outside temperatures are for the window surface. How much heat is transferred through the window (k=.54 BTU/hr ft ° F)? 2. A small heated...
Help with a-g, answers given. Show work
The inner pipe of a double-pipe heat exchanger has an OD of 1.9 in. and contains 36 rectangular fins of the type shown in the sketch below. The fins are made of steel (k 34.9 Btu/h ft. "F) and are 0.5 in. high and 0.035 in. thi temperature is 250°F and the fluid in the annulus surrounding the fins is at 150°F with a heat-transfer c ck. The pipe wall ft2 、 c,...
(2 pts) Heat is transferred from a hot fluid (temperature T1 and heat transfer coefficient h2) through a plane wall of thickness 8, surface area A and the thermal conductivity k. The thermal resistance for the set up is + (a) AC ) (b) A (i + + ) (c) 2 (na + + n2) (d) A (na + b +h2) (2 pts) An increase in convective heat transfer coefficient over a fin will (a) increase effectiveness (b) decrease effectiveness...
1) 1.5 A composite refrigerator wall is composed of zin. of corkboard sandwiched between a ² inch thick layer of oak and a #" thick aluminum lining on the inner surface. If hin 2 Btu/hr fe of and hout Bte/urff of; a) Draw the thermal circuit, and find total. b) Assume Too in = 20°F and Too out 90°r. Calculate the heat flux (9") through the walls (Btu/hr. ft) () Find Ti, To, To, and T4 KAR- 136 hout 15...
ro ri = 0.05m 1 A pipe with surface temperature T1 = 380 K is wrapped with 0.09 m of glass fiber pipe insulation. The outer surface temperature of the insulation, T2 is equal to 354 K and its emissivity is equal to 0.74. The insulation is also subject to natural convection with a bulk fluid temperature of 298 K and h = 1W/m2-K. For a pipe length of 100 m, and assuming that the room temperature is similar to...
(8 marks) The heat generated from power dissipation of a silicon chip is transferred by convection heat transfer from top and bottom of the chip. Top surface of the chip is covered by a 4-mm thick aluminum cover (k = 240 W/m.k) which is subjected to convection heat transfer on its top surface. Bottom surface of the chip is directly subjected to convection. Convection heat transfer coefficient of fluid is h = 1000 W/m²K and To = 25 °C. The...
Most questions answered within 3 hours.
-
Each row of the table below describes an aqueous solution at
25°C
.
The second column...
asked 1 minute ago -
A horizontal wire is at y = 0. Current travels in the +x
direction. The magnetic...
asked 1 minute ago -
Let X be a continuous random variable whose PDF is Let X be a
continuous random...
asked 22 minutes ago -
Martinez Company’s relevant range of production is 7,500 units
to 12,500 units. When it produces and...
asked 20 minutes ago -
A football with a mass of 1.2 kg is kicked from ground level to
a height...
asked 26 minutes ago -
Remember: Changes in supply determinants shift supply, and
changes in demand determinants shift demand. We say...
asked 24 minutes ago -
Why is the answer b), for this question? I came up with C) for
my incorrect...
asked 31 minutes ago -
Suppose that you know that in the population of full-time
employees in the United States, the...
asked 53 minutes ago -
This experiment was designed originally to sample various meat and carcass quality
aspects of Ontario pigs...
asked 53 minutes ago -
Dopamine Hydrochloride: draw the structure And Show the
functional groups in different colors and label the...
asked 45 minutes ago -
A rope supports a 10 kg dumbbell hanging from it. What is the
tension in the...
asked 45 minutes ago -
) Raw materials are studied for contamination. Suppose that
the number of particles of contamination per...
asked 1 hour ago