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Waste heat of exhaust hot air from a manufacturing process may be recovered by passing water through a thin-walled tube of 1.00 cm diameter as shown. Assume the temperature of the hot air is 177℃ in...
Waste heat of exhaust hot air from a manufacturing process may be recovered by passing water through a thin-walled tube of 1.00 cm diameter as shown. Assume the temperature of the hot air is 177℃ in cross flow with a velocity of 20 m/s over the tube. The inlet and outlet temperature of water are 20C and 60 C, rospectively, and the ilow rate is 0.2 k/s. Deiemine (a) the total heat transfer rate from air to water, (b) The...
Problem 2: Heat exchanger (25 points) Cold water (op 4179 J/kg K) enters the tubes of a heat exchanger at 20 °C at a rate of 3 kgs. while hot oil (cp 2200 J/kg.K) enters the shell at 130 C at the sam...
Problem 2: Heat exchanger (25 points) Cold water (op 4179 J/kg K) enters the tubes of a heat exchanger at 20 °C at a rate of 3 kgs. while hot oil (cp 2200 J/kg.K) enters the shell at 130 C at the same mass flow rate and leaves at 60°C The heat exchanger consistsoftwo shells and 20 tubes, each executing four passes (two passes per shell). If the W/m2-K, assume the tube wall is very thin with convective heat transfer...
Hot water is often carried by copper pipes in residential homes. Say that we have water...
Hot water is often carried by copper pipes in residential homes. Say that we have water flowing from a hot water tank to the shower, and that when the water enters the (pure copper, k = 386 W/m-C) copper pipe (ID = 3/4”, OD = 7/8”), it has Tin = 108 F = 42.2 C. The ambient air temperature is Tout = 19 C. The inner heat transfer coefficient hin = 150 W/m2-C, while hout = 13 W/m2-C. We can...
Problem 3 (20 points) A cross-flow heat exchanger consists of a bundle of 32 tubes in a long duct. Hot water at 150°C and a mean velocity of 0.5 m/s enters the tubes having inner and outer diameters...
Problem 3 (20 points) A cross-flow heat exchanger consists of a bundle of 32 tubes in a long duct. Hot water at 150°C and a mean velocity of 0.5 m/s enters the tubes having inner and outer diameters of 10.2mm and 12.5mm and has to be cooled to 136°C. The tubes are made of steel of thermal conductivity k-40 W/m.K. Air at 10°c enters the exchanger (unfinned) with a volumetric flow rate of 1.0 m3/s. The convective heat transfer coefficient...
re:0 of 1 p 1.19-T 7 ot 12 2 complete HIV Score: 4.17%, os r 12...
re:0 of 1 p 1.19-T 7 ot 12 2 complete HIV Score: 4.17%, os r 12 r sked "Ave you a tolul abstaner tom or do you on occanion coeeolic beverages7 Ofhe 1100 auts suneyed 440 indicated that they otlstmesn al) Determine the sangle proportion for each sample The proportions of the aduts whe took the 1040 survey and the necent survey wene oal abtaines aeanrespectely 0 Comments SORT BY O Type hese to search F6 2 4
i need help on number3 lelmperaturein the luid as a function of r, the distance from...
i need help on number3
lelmperaturein the luid as a function of r, the distance from the descne t re? What are the boundary conditions? The thermal conductivity k of the fluid is considered center of the sphe constant. The temperature of the sphere constant at Ta boundary is constant at Tr. and the temperature far from the fluid is (b) Determine the temperature profile in the fluid. (c) From the temperature profile, obtain an expression for the heat flux...
It is possible to dissolve this chain. Your material is hot. I want the solution as...
It is possible to dissolve this chain. Your material
is hot. I want the solution as soon as possible, half an hour
(Answer five questions) Note: Take: R.-8.314kJ/kg K. For air c=1.005kJ/kg K & y=1.4 Mc =12kg/kmol, Mo. -32 kg/kmol, Myz =28 kg/kmol, M.,=29 kg/kmol, MH2 =28 kg/kmol i. Q1: A- Answer false or true and discusse the followings: For an adiabatic system d. 20. ii. It is impossible to construct a device that operates in a cycle and produces...
Problem 1. (25%) The temperature on the inside surface of a CYLINDRICAL tank is T.(11) =...
Problem 1. (25%) The temperature on the inside surface of a CYLINDRICAL tank is T.(11) = 100°C under steady state conditions. The temperature outside the tank, T2(2), needs to be determined. The inner radius is 1 m and the outer radius is 1.3 m, and the tank material has a conductivity of k = 15 W/m. K. ONLY CONVECTION on the outer surface has to be considered. The ambient temperature is To = 25°C and the convection heat transfer coefficient...
Two large parallel plates with surface conditions approximating those of a blackbody are maintained at 800°C...
Two large parallel plates with surface conditions approximating those of a blackbody are maintained at 800°C and 100°C, respectively. Determine the rate of heal transfer by radiation between the plates in Wim and the radiative heat transfer coefficient in W/m K ) 12 Write down the one-dimensional sent heal conduction equation for a plane wall with constant thermal conductivity and heat generation in its simplest form, and indicate what each variable represents 13 Write down the one-dimensional transient heat conduction...
Waste heat of exhaust hot air from a manufacturing process may be recovered by passing water through a thin-walled tube of 1.00 cm diameter as shown. Assume the temperature of the hot air is 177℃ in cross flow with a velocity of 20 m/s over the tube. The inlet and outlet temperature of water are 20C and 60 C, rospectively, and the ilow rate is 0.2 k/s. Deiemine (a) the total heat transfer rate from air to water, (b) The...
Problem 2: Heat exchanger (25 points) Cold water (op 4179 J/kg K) enters the tubes of a heat exchanger at 20 °C at a rate of 3 kgs. while hot oil (cp 2200 J/kg.K) enters the shell at 130 C at the same mass flow rate and leaves at 60°C The heat exchanger consistsoftwo shells and 20 tubes, each executing four passes (two passes per shell). If the W/m2-K, assume the tube wall is very thin with convective heat transfer...
Problem 3 (20 points) A cross-flow heat exchanger consists of a bundle of 32 tubes in a long duct. Hot water at 150°C and a mean velocity of 0.5 m/s enters the tubes having inner and outer diameters of 10.2mm and 12.5mm and has to be cooled to 136°C. The tubes are made of steel of thermal conductivity k-40 W/m.K. Air at 10°c enters the exchanger (unfinned) with a volumetric flow rate of 1.0 m3/s. The convective heat transfer coefficient...
re:0 of 1 p 1.19-T 7 ot 12 2 complete HIV Score: 4.17%, os r 12 r sked "Ave you a tolul abstaner tom or do you on occanion coeeolic beverages7 Ofhe 1100 auts suneyed 440 indicated that they otlstmesn al) Determine the sangle proportion for each sample The proportions of the aduts whe took the 1040 survey and the necent survey wene oal abtaines aeanrespectely 0 Comments SORT BY O Type hese to search F6 2 4
i need help on number3
lelmperaturein the luid as a function of r, the distance from the descne t re? What are the boundary conditions? The thermal conductivity k of the fluid is considered center of the sphe constant. The temperature of the sphere constant at Ta boundary is constant at Tr. and the temperature far from the fluid is (b) Determine the temperature profile in the fluid. (c) From the temperature profile, obtain an expression for the heat flux...
It is possible to dissolve this chain. Your material
is hot. I want the solution as soon as possible, half an hour
(Answer five questions) Note: Take: R.-8.314kJ/kg K. For air c=1.005kJ/kg K & y=1.4 Mc =12kg/kmol, Mo. -32 kg/kmol, Myz =28 kg/kmol, M.,=29 kg/kmol, MH2 =28 kg/kmol i. Q1: A- Answer false or true and discusse the followings: For an adiabatic system d. 20. ii. It is impossible to construct a device that operates in a cycle and produces...
Problem 1. (25%) The temperature on the inside surface of a CYLINDRICAL tank is T.(11) = 100°C under steady state conditions. The temperature outside the tank, T2(2), needs to be determined. The inner radius is 1 m and the outer radius is 1.3 m, and the tank material has a conductivity of k = 15 W/m. K. ONLY CONVECTION on the outer surface has to be considered. The ambient temperature is To = 25°C and the convection heat transfer coefficient...
Two large parallel plates with surface conditions approximating those of a blackbody are maintained at 800°C and 100°C, respectively. Determine the rate of heal transfer by radiation between the plates in Wim and the radiative heat transfer coefficient in W/m K ) 12 Write down the one-dimensional sent heal conduction equation for a plane wall with constant thermal conductivity and heat generation in its simplest form, and indicate what each variable represents 13 Write down the one-dimensional transient heat conduction...
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