Finned heat sinks are used to keep computer chips in an acceptable temperature range. The heat sink base is 53 mm x 57 mm, and the maximum allowable chip temperature is 75 C. An array of 54 aluminum fins (k = 237 W/m*K) which have a square cross-section (3 mm x 3 mm) are attached to the heat sink. The length of each fin is 30 mm. The cooling air supplied to the heat sink is 25 C. If the convection heat transfer coefficient is 125 W/m2*K, what is the heat transfer rate (in W) from the heat sink, assuming adiabatic fin tips? (Hint: heat transfer does not solely occur from the fins.)

Q: An IC with a surface area of 4,000 mm2 is cooled by a heatsink attached to its top surface.  The…

A: Given surface area of the IC, A=4000 mm2=4×10-3 m2. Manufacturer thermal resistance rating of the…

Q: 3.26 A composite wall separates combustion gases at 2600°C from a liquid coolant at 100°C, with gas-…

A:

Q: Problem-1: Superheated steam at an average temperature 200°C is transported through a steel pipe (k…

A:

Q: (a) Determine the temperature at tip of spoon handle assuming heat transfer from the tip of the…

A: The thermal conductivity of stainless steel is The cross section area of spoon is The heat transfer…

Q: Q21 A long carbon steel rod of length 40 cm and diameter 10 mm (k = 40 w/mK) is placed in such that…

A: Given data : Diameter of Red=d=10mm=0.01m                   Length of Red=l=40 cm…

Q: The walls of a refrigerator are typically constructed by sand- wiching a layer of insulation between…

A: Given: Inside temperature (T∞,i)=4°COutside temperature…

Q: An insulation (kins = 0.14 W/(m K) ) layer that is 0.002m thick surrounds a wire (diameter=0.0025m)…

A:

Q: Pravinbhai

A: The objective of this question is to determine the temperature at the mid-plane of the Inconel…

Q: صقات A coat is made of 5 layers of 0.1 mm thick synthetic fabric separated by 1.5 mm thick air…

A:

Q: 3. A 3 in O.D. aluminum tube (k=133 BTU/h ft°F) has 16 longitudinal fins spaced around its outside…

A: Give data: The outer diameter of the tube, do=3 in. The thermal conductivity of aluminum, k=133…

Q: manufacturer plans to use steel wire (ks = 25 Wm-1 K-1 ) in a household appliance. For safety…

A:

Q: Consider a 0.6 m X 0.6 m epoxy laminate (k = 0.2 W/m-k) whose thickness is 5 mm. In order  to reduce…

A: Solution: Given Data: ke=0.2 W/m-Kt=5 mmkc=380 W/m-K∆T=20oCs=6 mmd=2 mm   To Find: (a) Thermal…

Q: The 7.5-mm-thick bottom of a 200-mm-diameter pan may be made from aluminum (k = 240 W/m-K) or copper…

A: Given data Thickness =7.5 mm  Diameter of pan =200mm T1=110°c Aluminum K=240 w/m°k For copper k=…

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.