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A molten mixture of salt (NaNO3-KNO3) is used as the heat transfer fluid for application in a parabolic trough solar field. The molten salt at 300oC is flown through a steel pipe (k = 14 W/moC) whose inner and outer diameters are 9 cm and 10 cm, respectively, in an environment at 32oC. If the heat transfer coefficients on the inside and the outside of the pipe are 150 and 30 W/m2C, respectively:
a. Determine the rate of heat loss from the molten salt per meter length of the pipe.
b. If the pipe is insulated with 5-cm-thick SiO2 wool insulation (k = 0.017 W/moC), what would be the rate of heat loss per meter length of the pipe. What is the reduction in heat loss (in %) if we use the insulation.
find the total heat loss per m length of the steam line. Find also the temperature at the interface of steam and insulation.
Refrigerant 134a enters a heat exchanger in a steady state refrigeration system as saturated vapor at 0 °F and exits at 20 °F with no change in pressure.
What is the couple moment of the two couples that act on the pipe assembly. The distance from A to B is d = 400 mm.express the result as a cartesian vector.
It is necessary to design a square-section composite bar that will withstand an applied load without deflecting more than a specified amount.The design specification for the bar, including its dimensions and loading criteria, is given below.
Motor coming to rest, A motor is running at 12 rpm and the switch is flipped and cuts the power. The rotor weighs 75 lbs.
Determine the temperature of the electric heater element and drawing of the temperature profile.
The direction of the forces are 0,-30 and +120 degrees from the positive X axis. Determine the magnitude and direction of the resultant force.
determine the designe power. An output speed of 175 RPMis specified. Determine: a) number of teeth on the small sprocket, b) number of teeth on the large sprocket, c) lubrication type required, d) the required length of chain (in inches) if the ce..
the motion of the slender 10kg rod AB is guided by collars of negligible mass that slide freely on the vertical and horizontal rods. knowing that the bar is released from rest when θ=30, determine the velocity of the collars A and B when θ = 60.
Tensile force formulas, A cylindrical steel beam is 2 inches diameter and 6 feet long. The modulus of elasticity is 30 x 1,000,000 psi. If the beam is subjected to a tensile force of 1000 lbs, what will be the resulting unit strain?
Calculate the value of forces P and Q for each test using the method of sections technique.
A power outage occurred at a water distribution pump station. Before the power outage the station was pumping with one pump at 6,000 gpm in a 18" diameter Steel Pipe
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