A thick carbon-steel pipe k=60.5 W/m-K has a 5 cm inner diameter and 7.5 cm outer diameter. The inner-surface heat-transfer coefficient is 88 W/m-K and the outer-surface heat-transfer coefficient is 18 W/m-K. Determine the overall heat-transfer coefficient for the pipe.
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- In a thermal power plant, a horizontal copper pipe of "D" diameter, "L" length and thickness 1.9 cm enters into the boiler that has the thermal conductivity as 0.37 W/mK. The boiler is maintained at 102 °C and temperature of the water that flows inside the pipe is at 34°C. If the energy transfer (Q) is 100735 kJ in 7 hours. Determine the Heat transfer rate, Surface area of the pipe and Diameter & Length of the pipe, if D = 0.015 L. Surface Area of the Pipe (m2) Pipe Length (in m) Pipe Diameter (in mm)In a thermal power plant, a vertical copper pipe of "D" diameter, "H" height and thickness 1 cm enters into the boiler that has the thermal conductivity as 0.35 W/mK. The boiler is maintained at 102C and temperature of the water that flows inside the pipe is at 25C. If the energy transfer (Q) is 119031 kJ in 7 hours. Determine the Heat transfer rate, Surface area of the pipe and Diameter & Height of the pipe, if H = 27 D.In a thermal power plant, a horizontal copper pipe of "D" diameter, "L" length and thickness 1.9 cm enters into the boiler that has the thermal conductivity as 0.37 W/mK. The boiler is maintained at 102 °C and temperature of the water that flows inside the pipe is at 34°C. If the energy transfer (Q) is 100735 kJ in 7 hours. Determine the Heat transfer rate, Surface area of the pipe and Diameter & Length of the pipe, if D = 0.015 L .
- In a thermal power plant, a horizontal copper pipe of "D" diameter, "L" length and thickness 1.7 cm enters into the boiler that has the thermal conductivity as 0.3 W/mK. The boiler is maintained at 107degreeC and temperature of the water that flows inside the pipe is at 31degreeC. If the energy transfer (Q) is 124925 kJ in 7 hours. Determine the Heat transfer rate, Surface area of the pipe and Diameter & Length of the pipe, if D = 0.012 L.Change in Temperature (in K) Heat Transfer Rate (in W) Surface Area of the Pipe (m2) Pipe Length (in m) Pipe Diameter (in mm)In a thermal power plant, a horizontal copper pipe of "D" diameter, "L" length and thickness 0.6 cm enters into the boiler that has the thermal conductivity as 0.33 W/mK. The boiler is maintained at 105C and temperature of the water that flows inside the pipe is at 28C. If the energy transfer (Q) is 118922 kJ in 6 hours. Determine the Heat transfer rate, Surface area of the pipe and Diameter & Length of the pipe, if D = 0.016 L. Change in Temperature (in K) = Heat Transfer Rate (in W) = Surface Area of the Pipe (m2) =A 20 cm diameter pipe (? = 0.8) is placed in a brick duct (? = 0.9) made of square section with dimension of 30 cm. The temperature of the pipe is 200oC while the temperature of the brick duct is 20oC. Calculate the rate of heat transfer (W) between the pipe and the duct.
- In a thermal power plant, a horizontal copper pipe of "D" diameter, "L" length and thickness 1.7 cm enters into the boiler that has the thermal conductivity as 0.36 W/mK. The boiler is maintained at 104°C and temperature of the water that flows inside the pipe is at 31°C. If the energy transfer (Q) is 117126 kJ in 6 hours. Determine the Heat transfer rate, Surface area of the pipe and Diameter & Length of the pipe, if D = 0.017 L (Please Solve the problem in a paper and upload in the separate submission link provided and also fill the answers without the unit in the box below) Change in Temperature (in K) Heat Transfer Rate (in W) Surface Area of the Pipe (m³)Q1/Consider a compressed air pipe of length L= 4.5 m, inner diameter 7.4 cm, outer diameter 8 cm, and thermal conductivity k =14 W/m °C equipped with a 300-W strip heater. Air is flowing through the pipe at an average temperature of (- 8°C), and the average convection heat transfer coefficient on the inner surface is h= 30 W/m - °C. Assuming 10 percent of the heat generated in the strip heater is lost through the insulation, (a) express the differential equation and the boundary conditions for steady one-dimensional heat conduction through the pipe, (b) obtain a relation for the variation of temperature in the pipe material by solving the differential equation, and (c) evaluate the outer surface temperature of the pipe.saturated steam at 110°C flows inside a steel pipe ( thermal conductivity 50W/mK) having an internal diameter of 10cm and external diameter of 12 cm . The surface heat transfer coefficient on steam side is 12 kW/m^2K and that onthe outside surface of pipe is 18W/m^2K . Determine the heat loss from the pipe if it is located in a space at 25 °C.
- Water (5.2 L'min) is flowing in a tube "D-3 cm, L- 5 m" and is to be heated from 15 C to 59.9°C by applying a uniform heat flux on the outer surface of the tube by electric resistance heater. What is the power rating of the resistance heater (kW)? If turbulent flow use Dituss-Boetler relation Nu- 0.023 Re Pr. ed 2.00 08 on Properties : p= 992.1 kg/m , C,-4179 J/kg. C, k= 0.631 W/wm°C, Pr = 4.32, v = 0.658E-6 Select one: O A 20.55 O B. 17.63 O.19.17 O D. 14.58 O E. 16.13Steam flows in an insulated pipe at a temperature 130 C. The insideheat transfer coefficient is 79 W/m2-K and the outside coefficient is 15W/m2-K. The pipe is mild steel (k=57 W/m-K) and has an inside radiusof 50 mm and an outside radius of 57 mm. the pipe is covered with a25.4 mm layer( k=0.09 W/m-K). Determine the overall heat transfercoefficient if the surrounding air temperature is 21.1 C.As shown in the sketh below, a steam pipe of 0.12-m inside diameter is insulated with a layer of calcium silicate. 2. Ts.2} 1. Ts,1} Steam Insulation (a) If the insulation is 22.5 mm thick and its inner and outer surfaces are maintained at T1 = 800 K and T,2 = 490 K, respectively, what is the rate of heat loss per unit length (d) of the pipe, in W/m? (b) Determine the rate of heat loss per unit length (q), in W/m, and outer surface temperature T, 2, in K, for the steam pipe with the inner surface temperature fixed at T,1 = 800 K, inner radius ri = 0.06 m, and outer radius r2 = 0.08 m. The outer surface is exposed to an airflow (T = 25°C) that maintains a convection coefficient of h = 25 W/m2-K and to large surroundings for which Tsur = T = 25°C. The surface emissivity of calcium silicate is approximately 0.8.