3-201 Steam in a heating system flows through tubes whose outer diameter is 3 cm and whose walls are maintained at a temperature of 120°C. Circular aluminum alloy fins (k = 180 W/m K) of outerdiameter 6 cm and constant thickness t = 2 mm are attached to the tube, as shown in Fig. P3-201. The space between the fins is 3 mm, and thus there are 200 fins per meter length of the tube. Heat istransferred to the surrounding air at 25°C, with a combined heat transfer coefficient of 60 W/m2-K. Determine the increase in heat transfer from the tube per meter of its lengthas a result of adding fins.page 245FIGURE P3-201r= 1.5 cm2-3 cmt=2 mmS 3 mm

Write all the given variables in the problem along with their proper notations.

Answered: 3-201 Steam in a heating system flows…

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.

Chapter2: Steady Heat Conduction

Section: Chapter Questions

Problem 2.56P

See similar textbooks

Similar questions

Two rods ( fins) having same dimensions , one made of brass ( k = 85 Wm K) and the other of copper ( k = 375 W/m K ) , having one of their ends inserted into a furnace . At a section 10.5 cm a way from the furnace , the temperature of brass rod 120oC . Find the distance at which the same temperature would be reached in the copper rod ? both ends are exposed to the same environment .
A flat plate in an ambient at temperature Tꝏ received from a source the net radiant heat flux q” (fig. 3-52). The thickness of the plate d is much less than its length 2L; the third dimension of the plate extends to infinity. The heat transfer coefficient from the ends of the plate, if needed, may be taken to be h3 ≠h1 ≠h2. Find the temperature distribution in the system.
The composite wall which is composed of 10 cm brick (k=0.40 W/m2-C), 2 cm cellotex (k=0.03 W/m2- OC), and 6 cm (k=0.30 W/m2-OC),has an outer (brick) temperature T=23 OC and an inner (plaster)temperature T=90 OC. Find the temperature between the cellotex andplaster in OC.
Consider a steam pipe of length L = 26 m, inner radius ? = 5 cm, outer radius ? = 7 cm, and thermal conductivity k = 25 W/m·K, as shown in Fig. The inner and outer surfaces of the pipearemaintainedataveragetemperaturesof? =120°Cand? =50°C,respectively.Obtain a general relation for the temperature distribution inside the pipe under steady conditions and determine the rate of heat loss from the steam through the pipe.
A water tank is completely filled with liquid water at 20ºC. The tank material is such that it can withstand tension caused by a volume expansion of 0.75 percent. Determine the maximum temperature rise allowed without jeopardizing safety. For simplicity, assume the volume expansion coefficient β at 313 K to be 0.377 × 10–3 K–1. The maximum temperature rise allowed in the tank is ______ ºC.
A flat plate in an ambient at temperature Tꝏ received from a source the net radiant heat flux q” (fig. 3-52). The thickness of the plate d is much less than its length 2L; the third dimension of the plate extends to infinity. The heat transfer coefficient from the ends of the plate, if needed, may be taken to be h3 ≠h1 ≠h2. Find the temperature distribution in the system. Please type answer note write by hend.
can you tell me what is heat conduction and how it relates to Bessel? you don't have to go in-depth. I just want to know how Bessel's differential equation helps with heat conduction.
Consider hotdog being cooked in boiling water in a pan. Would the heat transfer be modeled as one-dimensional or two-dimensional? Would the heat transfer be steady or transient? Explain.
A saucepan 30 cm in diameter is placed on the stove. The pot is made of stainless plate (k = 15 W / [m ° C]), and contains boiling water at 98 ° C. The bottom of the pot is 0.8 cm thick. The surface temperature in the bottom of the pan in contact with water is 105 ° C. a. If the heat transfer rate through the bottom of the pan is 500 W, determine the temperature of the outside surface of the pan that is exposed to the heating stove. = ° C. b. Find the convective heat transfer coefficient of boiling water = W / m2 ° C
Two cylindrical metal rods-one copper, the other lead-are connected in parallel with a temperature of 22.0 ∘C at one end and 113 ∘C at the other end. Both rods are 0.640 mm in length, and the lead rod is 2.76 cm in diameter. If the combined rate of heat flow through the two rods is 33.1 J/s , what is the diameter of the copper rod?
The heat loss per hour through 1 sq. ft of furnace wall 18" thick is 520 Btu. The temperature on the hot side of the wall is 1900 degrees F, and its average thermal conductivity is 0.61 Btu/hr-ft-°F. Determine the temperature on the other side of the wall in °C.
/ 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.

SEE MORE QUESTIONS

Recommended textbooks for you

Principles of Heat Transfer (Activate Learning wi…

Mechanical Engineering

ISBN:

9781305387102

Author:

Kreith, Frank; Manglik, Raj M.

Publisher:

Cengage Learning