The following device transfers from a hot fluid to a cold fluid. The hot water (1-2)...
1. Water enters the constant 130-mm inside-diameter tubes of a boiler at 7 MPa and 65°C and leaves the tubes at 6 MPa and 450°C with a velocity of 80 m/s. Calculate the velocity of the water at the tube inlet and the inlet volume flow rate. [5-14] 2. Air enters a nozzle steadily at 50 psia, 140°F, and 150 ft/s and leaves at 14.7 psia and 900 ft/s. The heat loss from the nozzle is estimated to be 6.5...
3.) A thin-walled container with a hot fluid (T50 °C) is placed in a quiescent cold water bath (Thth10 °C). The interior and exterior sides of the container may be approximated as vertical plates, and the container's bottom is well insulated. Find the overall heat transfer coefficient, U, for this arrangement. You can assume the hot fluid has the same properties as water and that the container wall is at a temperature of 30 °C. (30 points) Thin-walled container Cold...
Hot and cold water streams exchange heat in a double pipe heat exchanger in counter current flow. The pipes are 3 ft long. The inside pipe is a 5/8 inch BWG 12 copper tube. The outside pipe is a 1 inch Sch 40 steel pipe. The outside pipe is insulated to minimize heat loss to the surroundings. The hot water enters the inside tube at 180F with a flow rate such that Re = 10000 The cold water flows through...
A heat exchanger is being investigated as a waste heat recovery device. A heat exchanger is common device for using a hot fluid to heat a cold fluid without the fluids mixing. The cold fluid stream of liquid A enters at 294.2 K and leaves the device at a temperature of 330.91 K. Liquid A flows at a rate of 0.006 Kg/s and has a specific heat of 4180 J/(Kg K) and a specific volume of 0.00102 m3/Kg. Liquid B...
thermodynamics
2) Superheated water vapor flows into a diffuser operating at steady state conditions. At the inlet the steam temperature is 300F, its pressure is 14.7 psi and its velocity is 500 ft/sec. The steam exits the diffuser at 60 psi, saturated vapor with negligible velocity. There is no significant change in potential energy. Determine the Heat Transfer from the surroundings to the Diffuser, Btu/lbm Include in your answer: a) Schematic b) Given-data table c) Engineering Model d) T-v Diagram...
Twenty [kw] of heat is to be removed from 375 [k] water flowing at 0.15 [kg/s] into the inner pipe of concentric tube heat exchanger. Cooling water enters the annulus at 290 [k] and leaves at 320 [k] with a flow in the opposite direction of the inner flow. The diameter of the thin- walled inner pipe is 2.5 [cm] a) b) c) Calculate the exit temperature of the hot fluid and the mass flow rate of the cold fluid...
“A pipe is carrying hot water through a cold storage facility. The ambient air in the cold storage has temperature of ?5?C. To maintain uniform temperature in the cold storage, blowers installed in the facility induce a 3 m/s velocity to the cold air (which can be assumed to be flowing across the water pipe). Hot water inside the pipe has a mean velocity of 0.5 m/s. The internal and exter- nal diameter of the pipe are 8.4 cm and...
part 1) Heat transfers from cold surface to hot surface Group of answer choices True False 2) Light are a type of internal load Group of answer choices True False
Cold water with properties as shown in Table 4 flows at rate of
4 kg/s is heated from 28 oC to 54 oC in a shell-and-tube heat
exchanger as shown in Figure 4.The cold water inters the tubes
through thin-walled tubes, each tube has diameter of 19 mm, and the
average velocity inside each tube is 0.355 m /s. The shell side,
one pass is used with hot water as the heating fluid 1.8 kg/s
entering the exchanger at 93...
fluid is flowing horizontally from point 1 to point 2 as shown below. if the pressure at point 1 is 20 psi, find the pressure at point 2 in psi, if the velocity at point 1 is 11 ft/s and the velocity at point 2 is 41 ft/s. the specific gravity of the oil is 0.9. there is no energy loss or added in the system