Reviewer 4. Water flows steadily at 1.8kg/s through a 30mm diameter tube that is Score 5m long. The water enters at 20 C, and the tube temperature is maintained at 95 C by steam condensing on the exterior surface. Determine the outlet temperature of the water and the rate of heat transfer to the water. (20 scores) Properties: water (310K): c 4178J/kg-K, 695x106N*s/m2, k=0.628W/m-K, Pr 4.62. water (368K): -296x 10NS/m2
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Reviewer 4. Water flows steadily at 1.8kg/s through a 30mm diameter tube that is Score 5m long. The wate...
Water at m = 0.025 kg/s and Zn,i = 20°C enters an annular region formed by an inner tube of diame...
Water at m = 0.025 kg/s and Zn,i = 20°C enters an annular region formed by an inner tube of diameter D, = 20 mm and an outer tube of diameter Do-80 mm. Saturated steam flows through the inner tube, maintaining its surface at uniform temperature of T,i 100°C, while the outer surface of the outer tube is well insulated. If fully developed conditions may be assumed throughout the annulus, how long must the system be to provide an outlet...
Water at 340 K and a flow rate of 5 kg/s enters a black, thin‐walled tube,...
Water at 340 K and a flow rate of 5 kg/s enters a black,
thin‐walled tube, which passes through a large furnace whose walls
and air are at a temperature of 700 K. The diameter and length of
the tube are 0.25 m and 8 m, respectively. Convection coefficients
associated with water flow through the tube and airflow over the
tube are 300 W/m2·K and 50 W/m2·K, respectively.
Write an expression for the
linearized radiation coefficient corresponding to radiation
exchange...
Tutorial 3, 09] Water flows through a head exchanger tube at a rate of 10*m2/s. The...
Tutorial 3, 09] Water flows through a head exchanger tube at a rate of 10*m2/s. The diameter of the tube is 10cm. Water enters at 20°C and the rate of heat exchange is such that the temperature of the water reaches 60°C. At what temperature within this pipe length is there a transition in the flow regime. Draw the expected flow profile across the length of the tube. 1. Water in 104m2/s, 20°C Water out 10 m/s, 60°C
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...
Water flows with mass flow rate 0.0566kg/s through a pipe with diameter 30mm and length 600m....
Water flows with mass flow rate 0.0566kg/s through a pipe with diameter 30mm and length 600m. Find the pressure drop across the pipe if the friction factor is 8/Re, Density of water=1000Kg/m3 and the viscosity of water=0.0018Ns/m2 Select one: a. 3072 N/m2 O b. 3101 N/m2 0 c. 3111 N/m2 O d. 3001 N/m2 e. 3022 N/m2
A concentric tube heat exchanger for cooling lubricating oil consists of a thin-walled inner tube of...
A concentric tube heat exchanger for cooling lubricating oil
consists of a thin-walled inner tube of 25 mm diameter carrying
water and an outer tube of 45 mm diameter carrying the oil. The
exchanger operates in countercurrent flow with an overall heat
transfer coefficient of 55 W/m2 K and the tabulated average
properties given below. Mass flow rates of oil and water are both
0.1 kg/s, oil enters the exchanger at 100°C, and water enters the
exchanger at 30°C. (a)...
Superheated steam flows steadily through steel tubing (k 35 W/m-K) applying a tube inner surface temperature...
Superheated steam flows steadily through steel tubing (k 35 W/m-K) applying a tube inner surface temperature of 575°C. The tubing has an inner diameter of 300 mm and a wall thickness of 30 mm. Insulation (k 0.10 W/m-K) is applied to the outer surface of the tube while thin aluminum sheet is applied around the insulation as a protective covering. The ambient air at 27°C provides a convection coefficient of 6 W/m2-K. Determine the minimum insulation thickness necessary (mm) to...
Water at 320 K and a flow rate of 5 kg/s enters a black, thin-walled tube,...
Water at 320 K and a flow rate of 5 kg/s enters a black, thin-walled tube, which passes through a large furnace whose walls and air are at a temperature of 700 K. The diameter and length of the tube are 0.25 m and 8 m, respectively. Convection coefficients associated with water flow through the tube and airflow over the tube are 300 W/m2K and 50 W/m2.K, respectively. Tube, D-0.25 m L-8 me-1 Air 7-700 K Water -5 kas -Fumace,...
A counter-flow heat exchanger is stated to have an overall heat transfer coefficient of 284 W/m2.K...
A counter-flow heat exchanger is stated to have an overall heat transfer coefficient of 284 W/m2.K when operating at design and clean conditions. Hot fluid enters the tube side at 101°C and exits at 71°C, while cold fluid enters the shell side at 27°C and exits at 42°C. After a period of use, built-up scale in the heat exchanger gives a fouling factor of 0.0004 m2 K/W. The surface area is 93 m². Assume both hot and cold fluids have...
Water enters through a thick-walled tube having inner and outer diameters of 19 and 38 mm and 20 m long
Water enters through a thick-walled tube having inner and outer diameters of 19 and 38 mm and 20 m long The inlet temperature is Tmi=17℃ and outlet temperature is Tmo = 50°C. The outer surface of the tube is well Insulated, and electrical heating within the wall provides for a uniform generation rate of q = 8X105 W/m3. If the inner surface temperature of the tube Ts = 60 °C at the outlet what is the local convection heat transfer...
Water at m = 0.025 kg/s and Zn,i = 20°C enters an annular region formed by an inner tube of diameter D, = 20 mm and an outer tube of diameter Do-80 mm. Saturated steam flows through the inner tube, maintaining its surface at uniform temperature of T,i 100°C, while the outer surface of the outer tube is well insulated. If fully developed conditions may be assumed throughout the annulus, how long must the system be to provide an outlet...
Water at 340 K and a flow rate of 5 kg/s enters a black,
thin‐walled tube, which passes through a large furnace whose walls
and air are at a temperature of 700 K. The diameter and length of
the tube are 0.25 m and 8 m, respectively. Convection coefficients
associated with water flow through the tube and airflow over the
tube are 300 W/m2·K and 50 W/m2·K, respectively.
Write an expression for the
linearized radiation coefficient corresponding to radiation
exchange...
Tutorial 3, 09] Water flows through a head exchanger tube at a rate of 10*m2/s. The diameter of the tube is 10cm. Water enters at 20°C and the rate of heat exchange is such that the temperature of the water reaches 60°C. At what temperature within this pipe length is there a transition in the flow regime. Draw the expected flow profile across the length of the tube. 1. Water in 104m2/s, 20°C Water out 10 m/s, 60°C
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...
Water flows with mass flow rate 0.0566kg/s through a pipe with diameter 30mm and length 600m. Find the pressure drop across the pipe if the friction factor is 8/Re, Density of water=1000Kg/m3 and the viscosity of water=0.0018Ns/m2 Select one: a. 3072 N/m2 O b. 3101 N/m2 0 c. 3111 N/m2 O d. 3001 N/m2 e. 3022 N/m2
A concentric tube heat exchanger for cooling lubricating oil
consists of a thin-walled inner tube of 25 mm diameter carrying
water and an outer tube of 45 mm diameter carrying the oil. The
exchanger operates in countercurrent flow with an overall heat
transfer coefficient of 55 W/m2 K and the tabulated average
properties given below. Mass flow rates of oil and water are both
0.1 kg/s, oil enters the exchanger at 100°C, and water enters the
exchanger at 30°C. (a)...
Superheated steam flows steadily through steel tubing (k 35 W/m-K) applying a tube inner surface temperature of 575°C. The tubing has an inner diameter of 300 mm and a wall thickness of 30 mm. Insulation (k 0.10 W/m-K) is applied to the outer surface of the tube while thin aluminum sheet is applied around the insulation as a protective covering. The ambient air at 27°C provides a convection coefficient of 6 W/m2-K. Determine the minimum insulation thickness necessary (mm) to...
Water at 320 K and a flow rate of 5 kg/s enters a black, thin-walled tube, which passes through a large furnace whose walls and air are at a temperature of 700 K. The diameter and length of the tube are 0.25 m and 8 m, respectively. Convection coefficients associated with water flow through the tube and airflow over the tube are 300 W/m2K and 50 W/m2.K, respectively. Tube, D-0.25 m L-8 me-1 Air 7-700 K Water -5 kas -Fumace,...
A counter-flow heat exchanger is stated to have an overall heat transfer coefficient of 284 W/m2.K when operating at design and clean conditions. Hot fluid enters the tube side at 101°C and exits at 71°C, while cold fluid enters the shell side at 27°C and exits at 42°C. After a period of use, built-up scale in the heat exchanger gives a fouling factor of 0.0004 m2 K/W. The surface area is 93 m². Assume both hot and cold fluids have...
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