3. CIN: A 50 m long section of a steam pipe at 15°C. The average temperature...
Problem 1. Steam at 120°C is transported in a long 8" outer diameter pipe. Its outer surface is covered with a 1" thick fiberglass (thermal conductivity, 0.05 W/(mK)) insulation. When the outer temperature is 0°C, the rate of condensation of steam is measured to equal 0.06 g per meter of the pipe length. Estimate the heat transfer coefficient. The heat of vaporization of the steam is 2600 J/g. The resistance to the heat transfer through the pipe wall may be...
Steam at 150 °C flows in a stainless steel pipe which has a thermal conductivity of 16 W m-1 K -1 whose inner and outer diameters are 5 and 6 cm respectively. The pipe is covered with 3 cm think insulation having a thermal conductivity of 0.035 W m-1 K -1 . The combined convection and radiation heat transfer coefficient at the outside surface of the insulation is 20 W m-2 K -1 and the surroundings are at 10 °C....
Exercise 1.16 An insulated district heating pipe with a total diameter d = 0.4 m is laid in the ground at a depth of h = 1.2 m. For a long cold period with an average ground surface temperature of 0°C and a temperature at the outer edge of the pipe insulation of 20°C, the heat loss per 1km of steam pipe must be calculated. The thermal conductivity of the soil should be assumed to be 0.6 W/mk Exercise 1.16...
a) what is the heat loss per unit length from the pipe in W/m? b) Estimate the heat loss per unit length if a 50 mm thick layer of insulation with a conductivity of 0.058 W/m K. Neglect radiation for this part. 3. A 0.20-m diameter, thin-walled steel pipe is used to transport saturated steam at a temperature of 486K in a room for which the air temperature is 25°C and convection heat transfer coefficient at the outer surface of...
Problem 3 (30): Steam at Too,1 340 °C flows in a cast iron pipe [k- 80 W/m.°C] whose inner and outer diameter are Di 6 cm and D2 -8 cm, respectively. The pipe is covered with a 4-cm thick glass wool insulation [k-0.05 W/ m°C]. Heat is lost to the surroundings at Too,2 - 21°C by natural convection and radiation, with a combined heat transfer coefficient of h- 18 W/m2 °C. Taking the heat transfer coefficient inside the pipe to...
5.10. A pipe carrying steam at 250°C with and OD of 0.2 m is insulated using a material with conductivity of 0.085 W/mK. The insulation is off-set from the axis by 0.05 m and the OD of the insulation is 0.4 m. Determine the heat loss from the pipe if the outside surface temperature of the insulation is 60°C.
system, hot water at an average temperature of 80°C is flowing through a 15-m section of a cast In a heating iron pipe (k 50 W/m K) whose inner and outer diameters are 4 cm and 5 cm, respectively. The outer surface of the pipe, whose emissivity is 0.75, is exposed to the cold air at 10°C in the basement. with a heat transfer coefficient of 15 W/m2.K. The heat transfer coefficient at the inner surface of the pipe is...
a 0.4 m diameter, thin walled steel pipe is used to transport saturated steam Problem 3.049 A 0.4-m-diameter, thin-walled steel pipe is used to transport saturated steam at a pressure of 20 bars in a room for which the air temperature is 25°C and the convection heat transfer coefficient at the outer surface of the pipe is 20 W/m2-K. (a) What is the heat loss per unit length from the bare pipe (no insulation)? (b) Estimate the heat loss per...
please solve without copying solutions from this website ..give a clear solution Example 3 Steam at T1320°C flows in a cast iron pipe (k 80 W/m.K) whose inner and outer diameters are D1 = 5 cm and D2 = 5.5 cm, respectively. The pipe is covered with 3- cm-thick glass wool insulation with k = 0.05 W/m.K. Heat is lost to the surroundings at T5°C by natural convection and radiation with a combined heat transfer coefficient of h2 18 W/m2.K....
B Steam flows in a steel pipe, which is insulated by gypsum plaster. The inner and outer diameter of the pipe are 8 cm and 6 cm respectively with pipe length of 20-m. The thickness of gypsum plaster which wraps the pipe is 4 cm. The heat transfer coefficient of the inner pipe and outer insulation are 800 W/m2.°C and 200 W/m2.°C with inner pipe temperature of 200°C and outer insulator temperature of 10°C. The thermal conductivity of the pipe...