Answered: A stainless steel pin fin that has k =…

A stainless steel pin fin that has k = 16 W/m.o C , L = 10 cm , d = 1 cm and that is exposed to a boiling water convection situation with h = 5000 W/m2 . oC . Determine the effectiveness of the fin

Principles of Heat Transfer (Activate Learning with these NEW titles from Engineering!)

8th Edition

ISBN:9781305387102

Author:Kreith, Frank; Manglik, Raj M.

Publisher:Kreith, Frank; Manglik, Raj M.

Chapter8: Natural Convection

Section: Chapter Questions

Problem 8.15P: 8.15 A mercury bath at is to be heated by immersing cylindrical electric heating rods, each 20 cm...

See similar textbooks

Related questions

Q: The temperature of a cylindrical tank containing liquid nitrogen is -10°C. Tank diameter is 16 cm.…

A: Given data: Here, Ts represents the liquid temperature, d represents the diameter, Q̇ represents…

Q: A 10-cm-wide and 15-cm high vertical hot surface in 5°C air is to be cooled by a heat sink equally…

Q: The operations management of the industrial plant where you work asks you to determine the length of…

Q: Step 4 X Your answer is incorrect. What is the free convection heat transfer coefficient on the top…

Q: Q2 : A hot surface at 100°C is to be cooled by attaching 0.25 3 cm long, 0.25 cm diameter aluminum…

Q: A rectangular fin with k=43 W/m.C, thickness t=2 cm, length L=14 cm and width W=1 m. The base of the…

Q: Q3) A 5 cm diameter steel pipe is covered with a 1cm layer of insulating material having k 0,22 W/m…

Q: Consider a fin having 10-3 m perimeter and 10-6 m cross-sectional area is exposed to h = 30 W/m2K…

Q: The roof of a refrigerated truck compartment is of composite construction, consisting of a layer of…

Q: An 8-m-internal-diameter spherical tank made of 1.5-cm-thick stainless steel AISI 302 is used to…

A: Given data, ri = Internal radius of the spherical tank =4m Thickness of the tank =0.015 m ro = Outer…

Q: Q3/A 10-cm length of platinum wire 0.5 mm in diameter is placed horizontally in a container of air…

A: To find: The surface temperature. Given: The length of platinum wire is l=10 cm. The wire diameter…

Q: Define the following items. 1- Radiation shape factor. 2- Overall heat transfer coefficient. 3-…

A: (1) Radiation shape factor: It can be understand as the fraction of the radiation energy that falls…

Q: Q2/ A hot surface at 100 C is to be cooled by attaching 27778 copper fins (k-237 w/m.K), 3 cm long…

Q: The rectangular wall of a furnace consists of 3in. fire clay brick surrounded by 0.25in. of steel on…

Q: B/ An aluminum rod 3.5 cm in diameter and 25 cm long k = 204 W/m. C protrudes from a wall which is…

A: Given data Diameter = 3.5 cm Length = 25cm k = 204 W/m ° C

Q: A 1000-W iron is left on the ironing board with its base exposed to the air at 20°C. The convection…

Q: |A 3 m internal diameter spherical tank made of 1 cm thick stainless steel (k = 15 W/mK) is used to…

Q: What is(roughness)? what is its effect on heat transfer? Write one or two pages providing schemes or…

Q: What is heat transfer coefficient?

A: The heat transfer constant or film constant, or film effectiveness, in physical science and in…

Q: 2. A composite furnace wall is made up of a 14 in. lining of magnetite refractory brick, a 5.3 in.…

A: Given data as per the question The thickness of brick =14 in The thickness of magnesia =5.3 in The…

Q: Exercise: Consider a circumferential aluminum fin (k = 220 W/m.°C) having a thickness of 0.1 mm to…

Q: A 120mm diameter apple p = 990kg/m³, c, = 4170J/kg° C, k = 0.58w/m°C), approximately spherical in…

Q: The emissivity of galvanized steel sheet, a common roofing material, is ε = 0.13 at temperatures…

A: Write the emissivity of common roofing material. ε=0.13 Write the absorptivity of solar radiation.…

Q: 25 W/m. C. Determine the rate of heat transfer from the surface for a Ix0.5 m section of the plate.…

Q: The cylinders that come out of the heat treatment furnace are cooled in a stagnant air environment…

Q: To maximize production and minimize pumping costs, crude oil is heated to reduce its viscosity…

Q: Esitmate the heat flux through a composite wall with an average conducitivity of 0.15 W/m/K and a…

A: Given Data: The thickness of the wall, t=150 mm

Q: A 4.74 -m-internal-diameter spherical tank made of 1.5- cm-thick stainless steel (k = 15 W/m.°C) is…

Q: processing plant is convectively heating a solid half-sphere of radius of 12 cm made of pure…

Q: An aluminum fins 1.5 cm wide and 1 mm thick are placed on a 2.5 cm diameter tube to dissipate the…

A: Given: Width of the aluminium fin (w)=1.5cm or 0.015mThickness of the aluminium fin (t)=1mmDiameter…

Q: The heat loss from a fin is 6W. The effectiveness and efficiency of the fin are 3 and 0.75…

A: Given:Qf=6 Wε=3η=0.75

Q: The use of fins is most effective in application involving low convective heat transfer coefficient

Q: A 6-m-internal-diameter spherical tank made of 1.5-cm-thick stainless steel (k = 15 W/m·K) is used…

A: Given data Internal diameter of the spherical tank Di = 6m thickness of the tank t = 1.5 cm = 0.015…

Q: A 30-m-long section of an 8-cm-diameter horizontal hot water pipe passes through a large room whose…

Q: A very long fin ( k= 372 W/m .o C ) 2.5 cm diameter has one end maintained at 90 oC . The rod is…

A: As given fin is of infinite length so heat transfer is given as Q=kmθ0Ac Where k is thermal…

Q: By using fins, we all of the above O none of the above decrease the ambient temperature increase…

A: By using fins we increase the surface area of the object, And when we increase the surface area the…

Q: How does a fin enhance heat transfer at a surface?

A: Fins are the projections or extended surfaces protruding from hot surface into ambient fluid and…

Q: QUESTION 1 A domestic retriger ator with Inner dimensions of 0,7 m by 0.7 m at the base and height 1…

Concept explainers

Conduction and Convection

When energy travels from one object to another it is said to have undergone heat transfer. Heat transfer is nothing but the transfer of thermal energy or internal energy from one thing to another, like e.g., when a vessel with water, kept on top of a burner, heats up because of the flame underneath it.

Question

A stainless steel pin fin that has k = 16 W/m.o C , L = 10 cm , d = 1 cm and that is exposed to a boiling water convection situation with h = 5000 W/m2 . oC . Determine the effectiveness of the fin

Expert Solution

This question has been solved!

Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.

This is a popular solution!

SEE SOLUTION Check out a sample Q&A here

Step 1

VIEW

Step 2

VIEW

Trending now

This is a popular solution!

Step by step

Solved in 2 steps

SEE SOLUTION Check out a sample Q&A here

Knowledge Booster

Learn more about

Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, mechanical-engineering and related others by exploring similar questions and additional content below.

Similar questions

What is the fin effectiveness of a rectangular plate fin made of aluminum O.3 mm thick mounted on a 16-mm-OD tube if the vertical tube spacing is 50 mm and the horizontal spacing is 40 mm? The air-side heat-transfer coefficient is 65 W/m2 • K, and the conductivity of aluminum is 202 W/m • K. Ans. ƞ is 0. 72 Please provide a comprehensive step by step solution on how to get the answer.
A rectangular fin with k=43 W/m.C , thickness t=2 cm , length L=14 cm and width W=1 m. The base of the fin is maintained at a temperature of 200 C while the fin is exposed to a convection environment at T∞= 15 C and h∞ = 20 W/m2 .C .Using the chart , calculate the heat lost from the fin .
/ Hot square plate (1 m ×1 m) is to be cooled by attaching aluminum circular pin fins (D=0.25 cm, L= 3 cm) distributed with distance 0.6 cm as illustrated in Figs.(1-a) & (1-b). If the fin base temperature is 100°C, cooling air temperature is 30°C and h= 35 W/m. °C. Determine the total rate of heat transfer from the finned plate and the effectiveness of the fins? Assume k= 237 W/m.°C and nr=tanh mL/ mL.
A horizontal pipe having a surface temperature of 67 °C and diameter of 25 cm is buried at a depth of 1.2 m in the earth at a location where k = 1.8 W/m-°C. The earth surface temperature is 15 °C. Calculate the shape factor if the pipe length is 10 m.
The wall of a 5 m high cylinderical steel tank (ks= 20 W/mK) of inner diameter 1.5 m and 200 mm thick contains hot oil at 100 C. On the outside of the tank 12 mm of spray urethane insulation is added to stop the oil from cooling. If the worst outside temperature is -6 , (hi = 16 W/m^2 K) and (ho = 5 W/m^2 K) how much heat needs to be added to keep the tank at 100 C for pumping reasons and what are the overall heat transfer coefficients Uo and Ui?
How does a fin enhance heat transfer at a surface?
Convective heat transfer coefficient is 15 W/(m*K), surface area of the fin is 2 m^2, the temperature at the base is 70 C and the ambient temperature is 20 C. Determine the fin efficiency if the actual heat transfer rate from the fin is 500 W? not sufficient information 66 % none of the given 15 % 33 %
A very long fin ( k= 372 W/m .o C ) 2.5 cm diameter has one end maintained at 90 oC . The rod is exposed to a fluid whose temperature is 40oC . The heat transfer coefficient is 3.5 W/m2 . oC . How much heat is lost by the rod .
What is heat transfer coefficient?
A thick black-painted pine wood block at 20°C is subjected to constant solar heat flux of 1250 W/m2. a) Determine the exposed surface tempeature of the block after 20 minutes. b) What would your answer be if the block were made of aluminum?
A 30-m-long section of an 8-cm-diameter horizontal hot water pipe passes through a large room whose temperature is 20°C. If the outer surface temperature of the pipe is 70°C, determine the rate of heat loss from the pipe by natural convection. k = 0.02699 W/m °C Pr = 0.7241, ν = 1.749 ×10-5. Select one: a. 3485.4 W b. 3827.7 W c. 2211.8 W d. 2683.6 W
A solid sphere (ρ= 800 kg/m3, cp = 4000 J/kg-K, k = 0.4 W/m-K) of diameter 1 cm is taken out of the refrigerator when it is at 15˚C and placed in a water bath that is at 45°C. a)Calculate the convective heat transfer coefficient using an appropriate practical equation.