The addition of aluminum fins has been suggested to increase the rate of heat dissipation from one side of an electronic device 1 m wide and 1 m tall. The fins are to be rectangular in cross section, 2.5 cm long and 0.25 cm thick. There are to be 100 fins per meter. The convective heat transfer coefficient, both for the wall and the fins, is estimated at 35 W/m2K. With this information, determine the percent increase in the rate of heat transfer of the finned wall compared to the bare wall. (Note: 1. Take the base and the surrounding temperatures are 2000C and 20oC. 2. Assume convection heat transfer at the fin tip)

Q: Consider a 10m deep wall with a cross section as shown below. If the temperature on the left side of…

A:

Q: The wall of a 5 m high cylinderical steel tank (ks= 20 W/mK) of inner diameter 1.5 m and 200 mm…

A: The length of cylinder is .The thermal conductivity is .The inner diameter is .The thickness of…

Q: A pipe is used to transport refrigerant R-134a with an inner radius of 0.03m, outer radius of 5 cm,…

A: Given:To find:Temperature distribution and rate of heat gain per unit length.

Q: Rock has often been suggested as a medium for the thermal storage of energy. A cylindrical piece of…

A: “Since you have posted a question with multiple sub-parts, we will solve first three subparts for…

Q: A steel tube with a thermal conductivity of 45 W/m.K carries a fluid at 200°C, with a convection…

A: As per our guidelines we are supposed to solve only 3 subparts if multiple subparts are asked .…

Q: A liquid food is being pumped in a 1 cm thick steel pipe. The inside diameter of the pipe is 5 cm.…

A: “Since you have posted a question with multiple subparts, we will solve first three sub parts for…

Q: A hollow tube (inner radius = 40 mm) is heated by a constant surface heat flux of 34 W/m2. A fluid…

A:

Q: Nuclear wastes are packed in a long, cylindrical container. The wastes steadily generate energy at a…

A:

Q: Consider a 10m deep wall with a cross section as shown below. If the temperature on the left side of…

A:

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.