150 circular copper wings ( k=400 W/m C) with a diameter of 5 cm and a thickness of 1 mm were attached to a pipe with a diameter of 3 cm and a length of 150 cm, the outer surface of which was held at 220 C. The gap between the wings is 9mm and the pipe is in an environment of 22 C temperature. Since the heat transfer coefficient between the pipe and the surrounding air is 80 W/M^20C, calculate the heat transfer in the finned pipe. Find the amount of increase in heat transfer.

A steam bath center in a gym consists of a wall three different material layers. First two layers have thermal conductivity of 5 W/m K, 10 W/m K and 2*(10) W/m K respectively. All three layers have thickness of 8 cm each. The inside wall surface temperature of steam room is 80 °C whereas outside surface temperature is 25 °C. Draw this composite wall. Calculate the heat transfer per unit length of the wall.

Consider a large plane wall of thickness L = 0.2 m, thermal conductivity k = 1.2 W/mK, and surface area A = 15 m². Internally, the wall is assumed to generate heat at 500 W/m³. The left and right surfaces of the walls are exposed to convective heat transfer. On the left side (at x = 0 m), the wall temperature is maintained at 60°C. On the right surface side (at x = 0.2 m), the surface is exposed to convective heat transfer with an ambient temperature of 20°C. The convective heat transfer coefficient on the right side is assumed to be 200 W/m²K. Please answer the following questions: 1. What are the given material properties and boundary conditions? 2. What is the coordinate system used here? Please draw a schematic with proper coordinates to represent the problem 3. What are the assumptions associated with the problem? 1D, steady state, etc.? 4. Show the full heat conduction equation associated with the problem (including the unsteady term) 5. Show how to reduce it (based on…

Calculate the overall heat transfer coefficient of the steel pipe based on the inner surface. The inner diameter of the pipe is 12.7 cm, and the thickness of the pipe is 2.4 cm. The convection heat transfer coefficient in the pipe is 350 W / (m² ° C), the convective heat transfer coefficient outside the pipe is 25 W / (m² ° C), the thermal conductivity of the steel pipe is 15 W / (m ° C). If the pipe is used to deliver steam at 110 ° C and the ambient temperature is 20 ° C, determine the heat transfer rate of the pipe per meter. q = Watt / m