A 3-in Schedule 40 iron pipeline carries steam at 6 atm gauge. The line is uninsulated and is 70m long. The surrounding air is at 25C. The emissivity of the pipe wall is 0.70. How many kilograms of steam will condense per hour? What percentage of the heat loss is from conduction-convection?

Heat Transfer Question

Air at 25 ° C blows over the hot steel plate whose surface temperature is maintained at 200 ° C. The plates have dimensions of 50 cm x 50 cm and a thickness of 2.5 cm. The convection heat transfer coefficient on the upper surface is 25 W / (m² ° C). The thermal conductivity of steel is 45 W / (m ° C). Calculate the hourly heat loss from the plate surface. a. heat loss per hour = AnswerkJ. b. If the reverse side surface temperature is maintained, specify hourly heat loss = AnswerkJ.

A plane wall has a thermal conductivity of 20 W/(m-K) and generates heat at 0.5 MW/m3. The wall is 0.2 meters thick and is perfectly insulated on one side. The other side is exposed to fluid at 100 °C. The convective heat transfer coefficient between the wall and the fluid is 400 W/(m2 K). Determine the maximum temperature in the wall.

Estimate the natural convection heat transfer coefficient of the horizontal pipe. The temperature of the outer surface of the pipe is 120 ° C. The ambient air temperature is 25 ° C. The outer diameter of the pipe is 10 cm. Convection coefficient = Answer W / m² ° C.

Pls provide a complete and step by step solution. TY!

Steel pipe (outer diameter 100 mm) is covered with two layers of insulation. The inner layer, 40 mm thick, has a thermal conductivity of 0.07 W / (m K). The outer layer, 20 mm thick, has a thermal conductivity of 0.15 W / (m K). Pipes are used to deliver steam with a pressure of 700 kPa. The temperature on the outer insulation surface is 24 ° C. If the pipe is 10 m long, determine the following: (assuming that the conduction heat transfer resistance of the steel pipe and the vapor convection resistance are negligible). a. Heat loss per hour. = AnswerkJ / hour. b. Temperature between insulation layers. = Answer° C.

Air at 300 K flows across one side of a flat plate at a velocity of 15 m/s. The plate measures 2.0 m in the direction of flow and 1.0 m wide. If the surface temperature is 400 K, find the convective heat transfer. How much of the plate experiences laminar flow?

Q: water at 200² flows over 90.3m square Plate at velocity of 6 m/s at constant Plate is maintained Temperature at 556° calclate the heat by the plate. heat Transfer

Heat Loss from Steam Pipeline. A steel pipeline, 2-in. schedule 40 pipe, contains saturated steam at 121.1°C. The line is insulated with 25.4 mm of asbestos. Assuming that the inside surface temperature of the metal wall is at 121.1°C and the outer surface of the insulation is at 26.7°C, calculate the heat loss for 30.5 m of pipe. Also, calculate the kg of steam condensed per hour in the pipe due to the heat loss. The average k for steel from Appendix A.3 is 45 W/m - K and by linear interpolation for an average temperature of (121.1 + 26.7)/2 or 73.9°C, the k for asbestos is 0.182. Ans. 5384 W, 8.81 kg steam/h