Question

In: Mechanical Engineering

A horizontal uninsulated steam pipe passes through a large room whose walls and ambient air are...

A horizontal uninsulated steam pipe passes through a large room whose walls and ambient air are at 300 K. The pipe of 125-mm diameter has an emissivity of 0.85 and an outer surface temperature of 373 K. Calculate the rate of heat loss per unit length from the pipe.

Answer should be close to 384W/m

Please show all work neatly

Solutions

Expert Solution


Related Solutions

An uninsulated steam pipe with a wall temperature of 140 °C passes through a room of...
An uninsulated steam pipe with a wall temperature of 140 °C passes through a room of quiescent air of 14 °C. The pipe is horizontal and has an outer diameter of 20 cm. Find the following (include units if needed): a) The temperature to evaluate properties = __________ b) The Rayleigh number, _____________ c) The heat transfer coefficient, h = ____________ d) q’ along the pipe = ________________ e) The pipe diameter is decreased by 50%. If all other parameters...
An incompressible liquid flows through a straight horizontal pipe. Friction of the fluid within the pipe...
An incompressible liquid flows through a straight horizontal pipe. Friction of the fluid within the pipe causes a small amount of heat to be transferred from the fluid; to compensate, flow work must be done on the fluid to move it through the system (so W(dot)fl is greater than zero. a) How are V(dot)in and V(dot)out related, where V(dot) is the volumetric flow rate of the liquid? (Remember, fluid is incompressible) b) How must the pressures of Pin and Pout...
Steam enters a horizontal 15-cm-diameter pipe as a saturated vapor at 5 bar with a velocity...
Steam enters a horizontal 15-cm-diameter pipe as a saturated vapor at 5 bar with a velocity of 10 m/s and exits at 4.5 bar with a quality of 95%. Heat transfer from the pipe to the surroundings at 300K takes place at an average outer surface temperature of 400 K. For operation at steady state, determine (a) the velocity at the exit, in m/s. (b) the rate of heat transfer from the pipe, in kW. (c) the rate of entropy...
The hydrogen gas of question one passes through a pipe network and now has a static...
The hydrogen gas of question one passes through a pipe network and now has a static pressure of 1 atmosphere, temperature of 293 K and a Mach number of 1.7. Let ? = 1.4. It then encounters a normal shock wave. What is the temperature, pressure and Mach number downstream of the shock wave?
Steam in a heating system flows through tube whose outer diameter is 10 cm and whose...
Steam in a heating system flows through tube whose outer diameter is 10 cm and whose walls are maintained at a temperature of 150°C. Circular aluminum alloy 2024-T6 fins (k = 186 W/m · °C) of outer diameter 15 cm and constant thickness 2 mm are attached to the tube. Heat is transferred to the surrounding air at T∞ = 25°C, with a heat transfer coefficient of 50 W/m2 C . If the total tube length is 5 m and...
A 8.0-cm-diameter horizontal pipe gradually narrows to 5.0 cm . When water flows through this pipe...
A 8.0-cm-diameter horizontal pipe gradually narrows to 5.0 cm . When water flows through this pipe at a certain rate, the gauge pressure in these two sections is 31.0 kPa and 25.0 kPa , respectively. What is the volume rate of flow?
Water stands at a depth H in a large open tank whose side walls are vertical.
Water stands at a depth H in a large open tank whose side walls are vertical. A hole is made in one of the walls at a depth d below the water surface.At what distance R from the foot of the wall of the tank does the emergent stream strike the floor?How far above the bottom of the tank could the second hole be cut so that the stream emerging from it could have the same range as for the...
Steam at 400°F flows through a 2-in (ID) copper pipe having a thickness of 0.25 in....
Steam at 400°F flows through a 2-in (ID) copper pipe having a thickness of 0.25 in. The outside surface of the pipe is insulated with 1-in-thick layer of fiberglass and 0.008-in-thick layer of aluminum. The outside surface of the insulation is exposed to air at 80°F. The convection coefficients for steam and air are 25 and 12 Btu/h-ft2 -°F, respectively. The thermal conductivity of fiberglass is 0.022 Btu/h-ft-°F. Conductivities of metals may be taken from Geankoplis. a. Calculate the rate...
Water is being pumped through a horizontal pipe that is 36.0 m long and 13.5 cm...
Water is being pumped through a horizontal pipe that is 36.0 m long and 13.5 cm in diameter. A pump maintains a gauge pressure of 742 Pa at a large open tank at one end of the pipe. The other end of the pipe is open to the air. If this pipe is replaced by a second one of length 9 m and diameter 5.0 cm, what gauge pressure must the pump provide to give the same volume flow rate...
describe the path that air takes as it enters and passes through the human respiratory system....
describe the path that air takes as it enters and passes through the human respiratory system. pls help
ADVERTISEMENT
ADVERTISEMENT
ADVERTISEMENT