Using a 130 cm- long lead pipe with 2 cm inside diameter, a liquid water is transferred at 4 degrees Celsius. Its outside diameter measures 3 cm and the temperature of air outside is 20-deg C. The inside wall of the said pipe has a temperature of 8 degrees Celsius. Solve for: Outside area as basis, find (U) overall heat transfer coefficient
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- What is the formula to solve h1 and h2 (heat transfer coefficient)here? h1 (water) h2 (air).A Figure illustrates the tube-flow system. The heat transfer under developed flow conditions when the flow remains laminar. The wall temperature is Tw, the center of the tube temperature is Te the radius of the tube is re, and the velocity at the center of the tube is uo. The velocity distribution equation is: 1 uo Prove that: 1 aT uor. T - T= a ax 4 ro Start the solution of the equation : P{żar drjuc,T 1 a ()- aT 1 әт ur дr ar « дхQ2/ An aluminum sphere weighting 7kg and initially at a temperature of 533K is suddenly immersed in a fluid at 283K. if heat transfer coefficient between the sphere and fluid is 50W/m?.°C. Take density=2707kg/m3, specific heat=0.9KJ/kg.ºC and thermal conductivity= 204W/m°C. Determine th Bi number and And determine the time required to cool sphere to 263k
- This question about heat transfer/liquid. A horizontal wire of circular cross section with a diameter of d=1 mm is heated with electric current, and 100W(q'=100W/m) heat energy is given to the wire from 1m length. The wire T∞ = temperature at 20 ° C, large, compared to that in a stagnant water body, locate the outer surface temperature of the wire.K spherical shaped vessel of 1.2 m diameter is 100 mm thick. Find the rate of heat leakage, if the temperature difference between the inner and outer surfaces is 200° C. Thermal conductivity of material is 0.3 kJ /mh°C.1. A lead pipe has 2 cm inside diameter, 3 cm outer diameter, length of 130 cm. Liquid water at 4°C flows through the pipe with a bulk velocity of 2.50 km/hr. Air is blown around the outside of the pipe at 20 deg C. The inside wall of the said pipe has a temperature of 8 deg Celsius. Find: a. Overall heat coefficient (U) based on outside surface area b. Prandtl (Pr) and Reynolds (Re) numbers based on classification of flow