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A) Determine (a)the rate of heat transfer to the iced water in the tank IN W B) Determine the amount of ice at 0°C that melts during a 24-h period IN KG. Note that the temperature of the outside surface, T2 =4°C. Consider the latent heat of fusion of ice is 333.7kj/kg @1 atm.

A) Determine (a)the rate of heat transfer to the iced water in the tank IN W B) Determine the amount of ice at 0°C that melts during a 24-h period IN KG. Note that the temperature of the outside surface, T2 =4°C. Consider the latent heat of fusion of ice is 333.7kj/kg @1 atm.

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A) Determine (a)the rate of heat transfer to the iced water in the tank IN W B) Determine the amount of ice at 0°C that melts during a 24-h period IN KG. Note that the temperature of the outside surface, T2 =4°C. Consider the latent heat of fusion of ice is 333.7kj/kg @1 atm.
Transcribed Image Text:A) Determine (a)the rate of heat transfer to the iced water in the tank IN W B) Determine the amount of ice at 0°C that melts during a 24-h period IN KG. Note that the temperature of the outside surface, T2 =4°C. Consider the latent heat of fusion of ice is 333.7kj/kg @1 atm.
1) An insulated steam pipe located here the ambient temperature is C has an inside diameter of 60 mm with 12 mm thick wall. The outside diameter of the corrugated asbestos insulation is 125 mm and the surtace coeficient of still air ho 12 m2-K. Inside the pipe is steam having a temperature C with a film coefficient hi 0000 w/m2-K. Thermal conductivity of pipe and asbestos insulation are 46 and D.12 m2-Krespecthely Determine the heat loss per unit length of pipe IN WM INTERNAL AMBIENT TEMP 185 ANSWER C flows in a cast iron pipe (rie0 Wim "C) whose inner and outer 2) Steam at 71 diameters are 1-5 om and 02-5.6 cm,respectively. The pipe is covered with 3-om-thick glass wool insulation with 40.05 Wim-"C. Heat is lost to the surroundings at 72 "Cbynatural convection and radiation, with a combined heat transfer coeficient of /2-18 Wom2 "C. Taking the heat transfer coefficient inside the pipe to be M1-60 Wome "C, determine the rate of heat loss from the steam. Also determine the temperature drops across the pipe shell and the insulation (Length of pipe is 1 meter) TEMPERATURE OF STEAM DEG C EXTERNAL AMBIENT TEMPERATURE C 67 SORROUNDING AIR TEMPERATURE DEO C 17 A) Determine the rate of heat loss from the team (IN Detere the temperature drops across the pipe shell ONDEO C) c) Determine the temperature drops (INDEGC)across the ination. (Length ofpipe is 1 meter). ROOM TEMPERATURE DIGC 3) A5-m internal diameter spherical tankmade of 2-cm-thick stainless steel (k-15 W/m- "C) is used to store iced water at T-180*C. The tank is located in a room whose temperature is T-2 "C. The walls of the room are also at 22°C. The outer surface of the tankis black and heat transfer between the outer surtice ofthe tank and the surroundings is by natural convection and radiation. The convection heat transfer coefficients at the inner and the outer surfaces of the tankare h180 W/m2-C and t2-10 Wind "C, respectively. Determine (3) the rate of heat transfer to the loed water in the tank and (b) the amount of ice at 0 C that me during a 24-h period. Note that the temperature of the outside surface, T2=4°C. Consider the latent heat of fusion of ice is 333 7kjkg @1 atm
Transcribed Image Text:1) An insulated steam pipe located here the ambient temperature is C has an inside diameter of 60 mm with 12 mm thick wall. The outside diameter of the corrugated asbestos insulation is 125 mm and the surtace coeficient of still air ho 12 m2-K. Inside the pipe is steam having a temperature C with a film coefficient hi 0000 w/m2-K. Thermal conductivity of pipe and asbestos insulation are 46 and D.12 m2-Krespecthely Determine the heat loss per unit length of pipe IN WM INTERNAL AMBIENT TEMP 185 ANSWER C flows in a cast iron pipe (rie0 Wim "C) whose inner and outer 2) Steam at 71 diameters are 1-5 om and 02-5.6 cm,respectively. The pipe is covered with 3-om-thick glass wool insulation with 40.05 Wim-"C. Heat is lost to the surroundings at 72 "Cbynatural convection and radiation, with a combined heat transfer coeficient of /2-18 Wom2 "C. Taking the heat transfer coefficient inside the pipe to be M1-60 Wome "C, determine the rate of heat loss from the steam. Also determine the temperature drops across the pipe shell and the insulation (Length of pipe is 1 meter) TEMPERATURE OF STEAM DEG C EXTERNAL AMBIENT TEMPERATURE C 67 SORROUNDING AIR TEMPERATURE DEO C 17 A) Determine the rate of heat loss from the team (IN Detere the temperature drops across the pipe shell ONDEO C) c) Determine the temperature drops (INDEGC)across the ination. (Length ofpipe is 1 meter). ROOM TEMPERATURE DIGC 3) A5-m internal diameter spherical tankmade of 2-cm-thick stainless steel (k-15 W/m- "C) is used to store iced water at T-180*C. The tank is located in a room whose temperature is T-2 "C. The walls of the room are also at 22°C. The outer surface of the tankis black and heat transfer between the outer surtice ofthe tank and the surroundings is by natural convection and radiation. The convection heat transfer coefficients at the inner and the outer surfaces of the tankare h180 W/m2-C and t2-10 Wind "C, respectively. Determine (3) the rate of heat transfer to the loed water in the tank and (b) the amount of ice at 0 C that me during a 24-h period. Note that the temperature of the outside surface, T2=4°C. Consider the latent heat of fusion of ice is 333 7kjkg @1 atm
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