Show transcribed image text 5. What flow rate (linear velocity) of chilled air at 285 K is needed to have a steady state heat transfer rate, q, of 10,000 W leaving the surface of a square wall (2.5 m by 2.5 m) with a constant surface temperature of 315 K? (Flow is parallel to the surface) 6. A cylindrical steam pipe passes through a chemical plant, where wind passes in cross-flow over the outside of the pipe. The steam is saturated at 14.55 bar and you can assume that the resistances to heat transfer inside the pipe and of the pipe itself are minimal, so that the outside surface temperature of the pipe is equal to the saturation temperature of the steam. The pipe is stainless steel and has an outside diameter of 6.75 cm and a length of 29.5 m. The air flows over the pipe at 6.0 m/s and has a bulk fluid temperature of 27 °C, A. What is the rate of heat transfer from the pipe to the air? B. Would your answer change if the air flow direction changes to parallel flow? Iif so, calculate that q as well. Note: You may need to interpolate values for fluid properties to match the film temperature. 7. A spherical heating element is placed in water at 1 atm. The sphere has a diameter of 2.88 cm and maintains a constant surface temperature of 350 K. The water has a bulk temperature of 290 K and is flowing at o.72 m/s. What is the rate of heat transfer from the sphere to the water? Note: when using the steam tables to look up fluid properties, choose the correct temperature rather than the saturation temperature of the water-pressure has little effect on liquid properties, but temperature will change density etc