A 2 shell pass and 8 tube pass heat exchanger is used to cool the hot oil by water. The tubes are thin- walled with a diameter of 2 cm. The length of each tube pass in the heat exchanger is 3.5 m, and the overall heat transfer coefficient is 420 W/m2.°C. Water flows through the tubes at a rate of 0.15 kg/s, and the oil through the shell at a rate of 0.25 kg/s. The inlet temperature of oil is 172°C, and the inlet temperature of water is 20°C. Determine the outlet temperatures of the water and the oil, and the rate of heat transfer in the heat exchanger. (Cpoil =2230 J/kg.°C), (Cpwater = 4180 J/kg.°C)

A 2 shell pass and 8 tube pass heat exchanger is used to cool the hot oil by water. The tubes are thin- walled with a diameter of 2 cm. The length of each tube pass in the heat exchanger is 3.5 m, and the overall heat transfer coefficient is 420 W/m2.°C. Water flows through the tubes at a rate of 0.15 kg/s, and the oil through the shell at a rate of 0.25 kg/s. The inlet temperature of oil is 172°C, and the inlet temperature of water is 20°C. Determine the outlet temperatures of the water and the oil, and the rate of heat transfer in the heat exchanger. (Cpoil =2230 J/kg.°C), (Cpwater = 4180 J/kg.°C)

Principles of Heat Transfer (Activate Learning with these NEW titles from Engineering!)

8th Edition

ISBN:9781305387102

Author:Kreith, Frank; Manglik, Raj M.

Publisher:Kreith, Frank; Manglik, Raj M.

Chapter10: Heat Exchangers

Section: Chapter Questions

Problem 10.32P

See similar textbooks

Similar questions

Hot oil is to be cooled in a double-tube counter-flow heat exchanger.The copper inner tubes have a diameter of 2 cm and negligible thickness. The inner diameter of the outer tube (the shell) is 3 cm. Water flows through the tube at a rate of 0.5 kg/s, and the oil through the shell at a rate of 0.8 kg/s. Taking the average temperatures of the water and the oil to be 45 C and80 C, respectively, determine the overall heat transfer coefficient of this heat excha nger.
Hot oil is to be cooled in a double-tube counter-flow heat exchanger. The copper inner tubes have a diameter of 2 cm and negligible thickness. The inner diameter of the outer tube (the shell) is 3 cm. Water flows through the tube at a rate of 0.5 kg/s, and the oil through the shell at a rate of 0.8 kg/s. Taking the average temperatures of the water and the oil to be 45°C and 80°C, respectively, determine the overall heat transfer coefficient of this heat exchanger.
Water (cp = 4180 J/kg·K) enters the 2.5-cminternal- diameter tube of a double-pipe counter-flow heat exchanger at 17°C at a rate of 1.8 kg/s. Water is heated by steam condensing at 120°C (hfg = 2203 kJ/kg) in the shell. If the overall heat transfer coefficient of the heat exchanger is 700 W/m2·K, determine the length of the tube required in order to heat the water to 80°C using (a) the LMTD method and (b) the «-NTU method.
A 2-shell passes and 4-tube passes heat exchanger is used to heat glycerin from 20oC to 50oC by hot water, which enters the thin-walled 2-cm-diameter tubes at 80oC and leaves at 40oC . The total length of the tubes in the heat exchanger is 60 m. The convection heat transfer coefficient is 25 W/m2K on the glycerin (shell) side and 160 W/m2K on the water (tube) side.Determine the rate of heat transfer in the heat exchanger (a) before any fouling and (b) after fouling with a fouling factor of 0.0006 m2K/W occurs on the outer surfaces of the tubes
Water enters at 20 ℃ at a rate of 0.2 kg/s in a double-pipe parallel flow heat exchanger is to be heated to 60 ℃ by geothermal water that enters the heat exchanger at 145 ℃ at a rate of 0.3 kg/s. The overall heat transfer coefficient of the heat exchanger is 500 W/m2. ℃. The internal diameter of the tube is 1.2 cm. Determine the length of the heat exchanger. The specific heats of the water and geothermal water are given to be 4.18 and 4.31 kJ/kg.℃, respectively. Select one: a. 27.7 m b. 25.5 m c. 30.5 m d. 20.2 m
A two-shell passes and four-tube passes heat exchanger is used to heat glycerin from 20°C to 50°C by hot water, which enters the thin-walled 2-cmdiameter tubes at 80°C and leaves at 40°C. The total length of the tubes in the heat exchanger is 60 m. The convection heat transfer coefficient is 25 W/m2∙K on the glycerin (shell) side and 160 W/m2∙K on the water (tube) side. Determine the rate of heat transfer in the heat exchanger (a) before any fouling and (b) after fouling with a fouling factor of 0.0006 m2∙K/W occurs on the outer surfaces of the tubes.
Water enters at 20 ℃ at a rate of 0.1 kg/s in a double-pipe counter flow heat exchanger is to be heated by hot air that enters the heat exchanger at 90 ℃ at a rate of 0.3 kg/s. The overall heat transfer coefficient based on the inner side of the tube to be 100 W/m2. ℃. The length of the tube is 14 m and the internal diameter of the tube is 1.4 cm. Determine the outlet temperature of the water. The specific heats of the water and air are given to be 4.18 and 1.01 kJ/kg.℃, respectively.Select one:a. 30.5 ℃b. 24.3 ℃c. 28.8 ℃d. 32.7 ℃
Water enters at 20 ℃ at a rate of 0.1 kg/s in a double-pipe counter flow heat exchanger is to be heated by hot air that enters the heat exchanger at 90 ℃ at a rate of 0.3 kg/s. The overall heat transfer coefficient based on the inner side of the tube to be 100 W/m2. ℃. The length of the tube is 14 m and the internal diameter of the tube is 1.4 cm. Determine the outlet temperature of the water. The specific heats of the water and air are given to be 4.18 and 1.01 kJ/kg.℃, respectively. Select one: a. 32.7 ℃ b. 30.5 ℃ c. 24.3 ℃ d. 28.8 ℃
Water (Cp = 4180 J/kg · °C) enters the 2.5-cm internal-diameter tube of a double-pipe counter-flow heat exchanger at 17°C at a rate of 3 kg/s. Water is heated by steam condensing at 120°C (hfg = 2203 kJ/kg) in the shell. If the overall heat transfer coefficient of the heat exchanger is 900 W/m2 · °C, determine the length of the tube required in order to heat the water to 80°C using (a) the LMTD method and (b) the Effectiveness-NTU method
Water enters at 25 ℃ at a rate of 0.1 kg/s in a double-pipe counter flow heat exchanger is to be heated by hot air that enters the heat exchanger at 100 ℃ at a rate of 0.3 kg/s. The overall heat transfer coefficient based on the inner side of the tube to be 80 W/m2. ℃. The length of the tube is 12 m and the internal diameter of the tube is 1.5 cm. Determine the outlet temperature of the air. The specific heats of the water and air are given to be 4.18 and 1.01 kJ/kg.℃, respectively. Select one: a. 82.6 ℃ b. 72.5 ℃ c. 74.7 ℃ d. 90.1 ℃
A thin-walled double-pipe counter-flow heat exchanger is to be used to cool oil (Cpo= 2200 J/kg.K) from 150°C to 40°C at a rate of 2 kg/s by water (Cpw= 4180 J/kg.K) that enters at 22°C at a rate of 1.5Kg/s. If the diameter of the tube is 2.5 cm, and its length is 6 m, determine * The rate of heat transfer in the heat exchanger * The outlet temperature of the cold fluid * The Log Mean Temperature Difference (LMTD) * The overall heat transfer coefficient
A counterflow double-tube heat exchanger with hot engine oil fluid at inlet and outlet temperatures of 190°C and 60°C, respectively, and a flow rate of 0.65 kg/s. While cold engine oil at a flow rate of 1.05 kg/s has an exit temperature of 149°C and Cp-1.84 kJ/kg.K. It is known that the overall heat transfer coefficient is 305 W/m².K. Determine the heat transfer surface area of the heat exchanger.