A w=40 mm square computer CPU is air cooled with fans shown in the figure below. The surrounding air in the case has convection coefficient h = 100 W/m2⋅K and temperature T∞ = 30oC. If the aluminum heat sink (k = 230 W/m⋅K) on your computer has N = 20 exposed equally-spaced rectangular fins of thickness t =1 mm and length Lf = 15 mm: a) Calculate the overall efficiency ηo of the fins b) Given that the CPU is generating QCPU = 90 W, determine the temperature of the CPU, assuming the CPU is a uniform temperature and well-insulated on its sides. Ignore thermal contact resistance and fin array base resistance

Q: A metal composite wall consists of two outer metal skins (k = 100 W/m.k) 2 mm thick which  sandwich…

A: Given -                                              For a composite wall              thermal…

Q: A bar of thermal conductivity k = 140 W/m ⋅ K is of a trapezoidal cross section as shown in the…

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Q: A long copper (k = 200 W/m-K) tube has an inner radius o Refrigerant flows through the pipe. The…

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Q: A heater tube with power 2000 W is placed inside a fluid. Assuming all of the electrical power is…

A: from the given data, by heat balance h× Area×(Tfluid - Tambient) = 2000. here,  Area = pi×d×l =…

Q: ex: Find the heat transfer per unit area through the composite wall in Figure. Assume…

A: given data;T1=3700cT2=660cthermal conductivity of composite…

Q: Calculate the overall heat transfer coefficient of the steel pipe based on the inner surface. The…

A: Calculate the overall heat transfer coefficient of the steel pipe based on the inner surface, U…

Q: B: A composite wall is consist of two blocks A and B. Wall A (ka- 75 W/m. °C and thickness La)…

A: Given:The thermal conductivity of wall A is  and wall B is .The heat generation in wall A is .The…

Q: The walls of a refrigerator are typically constructed by sandwiching a layer of insulation between…

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Q: Q. Steam in a heating system flows through tubes whose outer diameter is 5 cm and whose walls are…

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Q: 1. Find the heat transfer per unit area through the composite wall in Figure below. Assume…

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Q: An Aluminum rod, k=206W/(m.°K), 5cm in diameter and 15cm in length, protrudes from a wall which is…

A: Given, Thermal conductivity of the rod (k)= 206W/3°K Diameter of the protrusion (d)= 5cm Length of…

Q: [2] An array of electronic chips is mounted within a sealed rectangular enclosure, and cooling is…

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Q: Suppose a 3 in schedule 80 steel pipe is covered with 1 in of an insulation having k = 60 mW/moC…

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Q: Problem 3: The composite wall shown in the figure below is 200mm H x 100mm wide. What is the…

A: Let T1 be the temperature between the adiabatic wall and G10 fiberglass, T2 be the temperature…

Q: cosh mL-1 sinhmL Heat Transfer at the base of the fin 9x=0=√√hPKA -cosh mL-1 (₁+0) sinh mL Heat…

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Q: Adiabatic Wall Steel 5mm T. = 25°C W h = 45 m²K Aluminum G10 Aluminum 16mm %3D Steel 5mm 6mm 8mm 4mm

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Q: There is a horizontal PVC pipe (k=0.16 W/m°C) with a diameter of 15 cm, a wall of 3 mm and a length…

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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.