Two metallic rods are connect in parallel to heat reservoirs held at T1 and T2, respectively. One rod has a circular cross section and the other has a square cross section. Calculate the heat flow rate for the two rods for the following parameters: Rod 1 Diameter Rod 1 Thermal Conductivity Rod 1 Length Rod 2 Area Rod 2 Thermal Conductivity Rod 2 Length T1 T2 1.50E-02 2.91E+02 2.00E+00 2.50E-05 1.63E+02 1.00E+00 3.50E+02 1.00E+02

Two metallic rods are connect in parallel to heat reservoirs held at T1 and T2, respectively. One rod has a circular cross section and the other has a square cross section. Calculate the heat flow rate for the two rods for the following parameters: Rod 1 Diameter Rod 1 Thermal Conductivity Rod 1 Length Rod 2 Area Rod 2 Thermal Conductivity Rod 2 Length T1 T2 1.50E-02 2.91E+02 2.00E+00 2.50E-05 1.63E+02 1.00E+00 3.50E+02 1.00E+02

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.

Chapter1: Basic Modes Of Heat Transfer

Section: Chapter Questions

Problem 1.10P: 1.10 A heat flux meter at the outer (cold) wall of a concrete building indicates that the heat loss...

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1.10 A heat flux meter at the outer (cold) wall of a concrete building indicates that the heat loss through a wall of 10-cm thickness is . If a thermocouple at the inner surface of the wall indicates a temperature of 22°C while another at the outer surface shows 6°C, calculate the thermal conductivity of the concrete and compare your result with the value in Appendix 2, Table 11.
2.15 Suppose that a pipe carrying a hot fluid with an external temperature of and outer radius is to be insulated with an insulation material of thermal conductivity k and outer radius . Show that if the convection heat transfer coefficient on the outside of the insulation is and the environmental temperature is , the addition of insulation actually increases the rate of heat loss if , and the maximum heat loss occurs when . This radius, is often called the critical radius.
A circular cross-sectional rod made of AISI Type 303 Stainless Steel is normally operated at126oF. Length and radius of the rod are 1.5 ft and 1.75 in., respectively. What would be thechange in length of the rod, if it is subjected to a temperature of 214oF? Coefficient of thermal expansion of the rods’ material is 9.6 × 10^-6 in./in. Degrees Fahrenheit.
I want to know how much heat the tube lost due to the material it is made of. Even if it is a small difference in temperature. It is a heat transfer problem material: Aluminum temperature touching cylinder: 65 Celcius temeprature inside cylinder 64.5 celsius room temperature 24 celcius Tube measurements outer radius r1 r1 = 4 in inner radius r2 r2 = 3 in outer circumference C1 C1 = 25.132741228718 in inner circumference C2 C2 = 18.849555921539 in height h = 8 in wall thickness t = 1 in
Q#01: Write a short note on the following: What are the best possible solutions to increase the heat transfer rate of a body? Which material will transfer more heat? Either a material with thermal conductivity ? = 121 or ? = 22 . Justify your answer. Explain the Fouling phenomenon. What is the effect of fouling on heat transfer rate.
Find the rate of heat transfer if the cylinder in a stainless steel rod.k = 15 W/m·K (8.7 Btu/h·ft·F), L = 1 m (3.3 ft), Th = 200 C (392 F), Tc= 100 C(212 F), A = 5 cm2 (0.8 in2).
Q#01: Write a short note on What are the best possible solutions to increase the heat transfer rate of a body.Which material will transfer more heat? Either a material with thermal conductivity ? = 121 or ? = 22 . Justify your answer. Explain the Fouling phenomenon. What is the effect of fouling on heat transfer rate?
1. For a steam pipe with a given diameter of 10 cm covered by two (2) layers of insulation. The first insulation has a thickness of 4 cm and a coefficient of thermal conductivity of 0.08 W/m.K. and the second insulation has a thickness of 3 cm and a thermal conductivity of 0.15 W/m.K. The steam main conveys steam at a pressure of 1.70 MPa with 25°C superheat. Outside temperature is 27°C. The pipe is 30 meters in length. (tsat @ 1.70 MPa = 204°C). Determine the following: a) The heat loss in KW b) Explain the concepts/principles that were considered and the factors that affected the condition of the above mentioned items (a & b).
The temperature distribution for the plane wall is given in Fig. and here T1 and T2 are the temperatures on both sides of the 2 walls. The thermal conductivity of the wall is constant and its thickness is L. T=T1 Subtract the expression for heat generation per unit volume based on x, which represents the distance from the wall for which the equation is satisfied. At x=0, take the heat generation rate as q0. T -T, - = C, +C,x² +C¸x' T, -T, | %3D |
A metal rod 1 sq. in. in cross section and 6 in. long is heated at one end and cooled at the other. If the rate of heat input is 3 BTu/hr and the difference in temperature of the two ends is 2 deg. F, what is the coefficient of thermal conductivity in BTU/(hr)(ft²)(⁰F/ft)?
The thermal conductivities of wood is kwood = 0.1W/(m°C)and air is kair = 0.0234W/(m°C). Part A If the temperature of the room is 20°C and outside is 10°C, find the rate of heat flow for a wall of wood with area = 10 m² and thickness of 5cm. O 60 W O 304 W O 34 W O 200 W O 100 W Submit Request Answer Part B The wall of wood with thickness of 5cm is now replaced with two layers of wood and a gap of air between the wood. Each layer of wood has a 2.5cm thickness and the gap is 1cm. The rate of heat flow will, decreases. increases. stay the same. Submit Request Answer Part C The temperature in the air gap will be, O 20°C, between 10°C and 20°C, O 10°C,
8.9 One end of a 9-in long × 7-in diameter copper bar is heated to 59.4°F, the far end of the bar is held at 23°C. If the sides of the bar are covered with thermal insulation, what is the rate of heat transfer? 8.11 When the far end of the copper bar in Prob. 8.9 has a 30-ft2 cooling fin attached to the end of the bar and is cooled by air convection, the temperature of the fin rises to t °F. If the temperature of the air is 23°F and the coefficient of heat transfer of the surface is 0.22 BTU/h, what is the value of t?

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Rod 1 Diameter	Rod 1 Thermal Conductivity	Rod 1 Length	Rod 2 Area	Rod 2 Thermal Conductivity	Rod 2 Length	T1	T2
1.50E-02	2.91E+02	2.00E+00	2.50E-05	1.63E+02	1.00E+00	3.50E+02	1.00E+02