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) If the outlet temperature of the oil is 50°C, determine the total rate of heat transfer and the outlet temperature of the water. (b) Determine the length required for the heat exchanger.
**Oil inlet temp is 100 C, oil outlet temp is 50C, water inlet is 30C. Mass flow rates of both water and oil are 0.1 kg/s**
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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 is comprised of a thin-walled inner tube...
A concentric tube heat exchanger for cooling lubricating oil is comprised of a thin-walled inner tube of 25 mm diameter carrying water and an outer tube of 45 mm diameter carrying the oil. The mass flow rates of both fluids are 0.1 kg/s. The exchanger operates in counter-flow with an overall heat transfer coefficient of 60 W/m2
Problem (25 Points - Chapter 11) A concentre tube heat exchanger for cooling lubricating oil is...
Problem (25 Points - Chapter 11) A concentre tube heat exchanger for cooling lubricating oil is comprised of a thin-walled me tube of 25-mm diameter carrying water and an our tube of 45mm diameter coming the The heat exchanger operates in counterflow with an overall heat transfer coefficient of W K and the average property as given in the table below. If the outlet temperature of the oil is 60°C, determine the following (a) total heat transfer rate, (b) outlet...
A concentric tube heat exchanger of length L = 2 m is used to thermally process...
A concentric tube heat exchanger of length L = 2 m is used to thermally process a pharmaceutical product flowing at a mean velocity of u_m,c = 0.1 m/s with an inlet temperature of T_c,i = 20 degree C. The inner tube of diameter D_i = 10 mm is thin walled, and the exterior of the outer tube (D_0 = 20 mm) is well insulated. Water flows in the annular region between the tubes at a mean velocity of u_m,h...
A thin-walled double-pipe counter-flow heat exchanger is to be used to cool oil (cp-2200 /kg K)...
A thin-walled double-pipe counter-flow heat exchanger is to be used to cool oil (cp-2200 /kg K) from 150 C to 40°C at a rate of 2 kg/s by water (c 4180J/kg.K) that enters at 22°C at a rate of 1.5 kg/s. The diameter of the tube is 2.5 cm, O and its length is 6 m. Let the water inlet temperature vary from 5°C to 25°C. Identify the graph that depicts the overall heat transfer coefficient as a function of...
Oil of unknown properties is heated in a shell-and-tube heat exchanger with one shell pass and...
Oil of unknown properties is heated in a shell-and-tube heat exchanger with one shell pass and 20 tube passes. The oil flows through the shell, and hot water flows inside the single copper tube that has an inner diameter of 20 mm, a wall thickness of 2 mm, and a length of 3 m per pass. The water enters at 360 K at a mass flow rate of 0.2 kg/s and leaves at 300 K. The inlet and outlet temperatures...
Two-pipe concentric concentric) for cooling the engine oil with the help of a water stream in...
Two-pipe concentric concentric) for cooling the engine oil with the help of a water stream in a large diesel engine a reverse (opposite) flow heat exchanger is used. Water at a flow rate of 0.3 kg/h from inside pipe with an inside diameter of 56 mm It flows. The inner pipe is made of stainless steel with a heat transmission coefficient of 16 W/mc and is meat (wall its thickness is 3 mm. Apart from this there is another pipe...
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...
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...
Question B2. An oil which has a heat capacity is 2.30 kJ/(kg·K) is being cooled in...
Question B2. An oil which has a heat capacity is 2.30 kJ/(kg·K) is being cooled in a heat exchanger from 372 K to 350 K and flows inside the tube at a rate of 3600 kg/h. A flow of 1450 kg water/h enters at 289 K for cooling and flow outside the tube. Calculate the water outlet temperature and heat transfer area if the overall heat transfer coefficient is 340 W/(m2 K) and the streams are countercurrent. (17.5 marks)
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...
Determine the effectiveness of the concentric tube heat exchanger. The working fluid through the heat exchanger...
Determine the effectiveness of the concentric tube heat exchanger. The working fluid through the heat exchanger is water and is flowing at 1 m/min for both cold and hot pipes. The hot water temperature at the tube inlet is 90°C and the temperature at the tube outlet is 60°C. The cold water temperature at the tube inlet is 50°C and the temperature at the tube outlet is 80°C. Assume the density and the specific heat of water are 988.1 kg/m3...
Problem (25 Points - Chapter 11) A concentre tube heat exchanger for cooling lubricating oil is comprised of a thin-walled me tube of 25-mm diameter carrying water and an our tube of 45mm diameter coming the The heat exchanger operates in counterflow with an overall heat transfer coefficient of W K and the average property as given in the table below. If the outlet temperature of the oil is 60°C, determine the following (a) total heat transfer rate, (b) outlet...
A concentric tube heat exchanger of length L = 2 m is used to thermally process a pharmaceutical product flowing at a mean velocity of u_m,c = 0.1 m/s with an inlet temperature of T_c,i = 20 degree C. The inner tube of diameter D_i = 10 mm is thin walled, and the exterior of the outer tube (D_0 = 20 mm) is well insulated. Water flows in the annular region between the tubes at a mean velocity of u_m,h...
A thin-walled double-pipe counter-flow heat exchanger is to be used to cool oil (cp-2200 /kg K) from 150 C to 40°C at a rate of 2 kg/s by water (c 4180J/kg.K) that enters at 22°C at a rate of 1.5 kg/s. The diameter of the tube is 2.5 cm, O and its length is 6 m. Let the water inlet temperature vary from 5°C to 25°C. Identify the graph that depicts the overall heat transfer coefficient as a function of...
Oil of unknown properties is heated in a shell-and-tube heat exchanger with one shell pass and 20 tube passes. The oil flows through the shell, and hot water flows inside the single copper tube that has an inner diameter of 20 mm, a wall thickness of 2 mm, and a length of 3 m per pass. The water enters at 360 K at a mass flow rate of 0.2 kg/s and leaves at 300 K. The inlet and outlet temperatures...
Two-pipe concentric concentric) for cooling the engine oil with the help of a water stream in a large diesel engine a reverse (opposite) flow heat exchanger is used. Water at a flow rate of 0.3 kg/h from inside pipe with an inside diameter of 56 mm It flows. The inner pipe is made of stainless steel with a heat transmission coefficient of 16 W/mc and is meat (wall its thickness is 3 mm. Apart from this there is another pipe...
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...
Question B2. An oil which has a heat capacity is 2.30 kJ/(kg·K) is being cooled in a heat exchanger from 372 K to 350 K and flows inside the tube at a rate of 3600 kg/h. A flow of 1450 kg water/h enters at 289 K for cooling and flow outside the tube. Calculate the water outlet temperature and heat transfer area if the overall heat transfer coefficient is 340 W/(m2 K) and the streams are countercurrent. (17.5 marks)
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...
Determine the effectiveness of the concentric tube heat exchanger. The working fluid through the heat exchanger is water and is flowing at 1 m/min for both cold and hot pipes. The hot water temperature at the tube inlet is 90°C and the temperature at the tube outlet is 60°C. The cold water temperature at the tube inlet is 50°C and the temperature at the tube outlet is 80°C. Assume the density and the specific heat of water are 988.1 kg/m3...
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