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- a shaft made of aluminum is 21 mm in diameter at the temperature of 22 degrees .the co-efficient of thermial expansion for aluminum is given on the table . If it must be expansion-fitted in a hole. Determine the temperature to which the shaft must be cooledn electric generator at a power plant produces energy by passing superheated steam from a high temperature container (reservoir), through a pipe connected to a series of fans, and then into a low temperature reservoir. As the steam passes across the blades of the fans some of the heat energy of the steam is transformed into mechanical energy, which turns the fans which in turn are connected to a generator, which in turn converts the mechanical energy into electrical energy. If the high temperature steam has a temperature of 412.1 K and the low temperature reservoir has a temperature of 105.4 K, what is the Carnot efficiency of this process?A 4-inch insulated arctic pipe is used for a construction camp. The lake source is 1500 meters away. The line is above ground on mud sills. Calculate the heat loss from the pipe if the outside ambient temperature is -40 deg F (minus 40). and the water coming out of the lake is at 1 deg C. Assume that the ID is 4-inches, OD is 4.5- inches and it s covered by 2-inches of urethane insulation. Use a k-factor of 34.9 BTU/hr-ft-degF for the pipe, 0.16 BTU-in/hr-ft2-degF for insulation, and an inside and outside convective film coefficients of 12.3 BTU/hr- ft2-deg F and 6.2 BTU/hr-ft2-deg F. Answer C 13.7 kW C 18.5 kW C 25.0kW C 28.5kW
- The surface temperature of a heater with a diameter of 50 mm in a horizontal position is 40°C. This heaterIt was immersed in water at 20°C. Find the heat lost per unit length of the heater.A 10 ft length of pipe with an inner radius of 1 in and outer radius of 1.25 in has an outer surface temperature of 250 F. The heat transfer rate is 30,000 BTU/hr. Find the interior surface temperature. Assume k = 25 BTU/hr-ft-F.48. Water is flowing in a smooth pipe of diameter D. A section of this pipe hav- ing a length of L is heated. Water at the inlet to the heated section has a tempera- ture of Tŋ. Water temperature at the exit of the heated section is Tp. The heated section of the pipe wall is maintained at a constant heat flux so that a constant temperature difference of AT, = T, – T, exists between the wall and the bulk wa- ter temperature. Show that for turbulent flow in the pipe and a specified heated length and pipe diameter, water temperature at the exit of the heated section is given by: 402 0.6 Pr T52 =Tf +0.0876 L AT DO.8 0.2 m
- Water going into a pipe with a tempeture of T1 and going out T2 . ambient tempeture is T0. Develop an expression for T2 ( based on heat transfer) Length of the pipe Lh0 - convective heat transfer coefficient of the airhW -convective heat transfer coefficient of the waterk- pipe thermal conductivity (W/m·K)d – pipe diameter Use any other varilable that you need and can be found online easily .Industrial pipes For externally insulated pipes, is it necessary to use skids in the region of contact between them and the sleepers?Item 1 1 of 5 II Review Part A A flow-through electric water heater has a 22 kW electric heater inside an insulated 2.0-cm-diameter pipe so that water flowing through the pipe will have good thermal contact with the heater. Assume that all the heat energy is transferred to the water. Suppose the inlet water temperature is 12°C and the flow rate is 8.0 L/min (about that of a standard shower head). What is the outlet temperature? Express your answer in degrees Celsius. ? Tout = °C Submit Request Answer Provide Feedback Next >
- Based on the picture above, make a schematic and determine the average temperature difference over the entire length of the tube (ATLM). (value 25)2. Engine oil (similar to oil C) flows at 1.2 ft/s through a 1-inch diameter tube. The bulk oil temperature is 190 F and the tube surface temperature is 210 F. Determine the unit convective coefficient for a tube length of 10 ft. If the tube length is doubled, what is the percentage increase (or decrease) in the film coefficient? Let k = 0.96 Btu-in/hr-ft2-F and c = 0.52 Btu/lb-F for the oil. *Bourdon tube is also referred to as an