Essentials of Heat Transfer: Principles, Materials, and Applications 1st. Edition by Massoud Kaviany | 9781107012400 | 1107012406 | Holooly

Essentials of Heat Transfer: Principles, Materials, and Applications

71 SOLVED PROBLEMS

Question: 3.6

A 1m^2 surface area designated as A1 is to be thermally insulated by placing an insulation of thickness l and conductivity k over it. The surface is at temperature T1 and the insulation surface is at temperature T2. This 1 m^2 surface area can be in the form of (a) a planar surface with area A1=LyLz

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The three surfaces have the same surface area [lat...

Question: 3.10

A combustion system consists of a cylindrical annulus combustion chamber, as shown in Figure Ex. 3.10(a). The heat from the combustion is to flow mostlyto the outside surface designated by T2. Therefore, a high conductivity solid material is used for the outer cylindrical shell. Here we use silicon

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(a) The thermal circuit diagram for this energy co...

Question: 4.6

A double-wall, evacuated glass thermos is used for storing cryogenic liquids (e.g., liquid nitrogen). The evacuation diminishes the conduction heat transfer between the walls, as depicted in Figure (a). However, heat transfer by radiation occurs between the glass wall surfaces. The glass walls can

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The thermal circuit model of the radiation heat tr...

Question: 7.5

A flame arrester is a heat storage, high melting temperature, porous solid (also called filter) placed upstream of a gaseous premixed fuel-oxidant stream to cool the flame (i.e., to quench or extinguish it) and prevent it from reaching the fuel source during the flashback. A stainless steel 316

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(a) Figure (b) shows the thermal circuit diagram. ...

Question: 6.12

A high speed liquid flowing inside a tube results in maintaining the internal surface of the tube at temperature T1. The tube is made of (i) copper or (ii) PVC (polyvinylchloride). These are examples of metallic and polymeric solids and represent high and low thermal conductivities. From Table

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(a) The thermal circuit diagram is shown in Figure...

Question: 3.8

A hot water pipe is insulated using an outside casing with formed-in-place, polyurethane foam filling the spacing. This is shown in Figure Ex. 3.8(a). The pipe is made of copper with an inner radius R = 3.7 cm and a wall thickness lc = 2 mm. The Teflon casing has an inner radius R2 = 7.2 cm and

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(a) The thermal circuit diagram is shown in Figure...

Question: 3.20

A rubber ring (i.e., rubber O-ring) with cross-sectional diameter D = 3 mm and ring radius Rr = 3 cm, as shown in Figure Ex. 3.20, is softened by heating in a microwave oven. The density of rubber is ρ = 1,000 kg/m^3 and its specific heat capacity is cp = 2,010 J/kg-K. A surface heat loss per unit

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The transient, uniform temperature of a body of vo...

Question: 6.14

A square base at Ts,0 = 80^◦C [rendered in Figure Ex. 6.14(a)], with each side having a dimension a = 10 cm, has pure aluminum pin fins of diameter D = 7 mm and length L = 70 mm, attached to it. There are a total of Nf = 10 × 10 = 100 fins. The air flows across the fins at a velocity of uf,∞ = 1 m/s

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(a) The thermal circuit diagram is given in Figure...

Question: 4.13

A surface-radiation burner is used to melt solid glass particles (similar to sand particles) for bottle glassmaking. This is shown in Figure Ex. 4.13(a). In order to have a nearly uniform radiation surface temperature T1, the fuel (natural gas) is provided to a combustion chamber in a distributed

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(a) The thermal circuit diagram is shown in Figure...

Question: 4.8

A thermal radiation source is developed by heating one side of a disk of diameter D2 by an acetylene-oxygen torch to a temperature T2 = 1,200 K, as shown in Figure Ex. 4.8. The other side radiates to a smaller, coaxial disk of diameter D1 separated by a distance l. In order to direct the greatest.

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(a) The thermal circuit diagram is shown in Figure...

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