Task 2A heat exchanger that is used for cooling lubricating oil is comprised of a thin-walled inner tube of 30mm diameter carrying water and an outer tube of 50 mm diameter carrying the oil. The exchanger operates in counterflow mode with an overall heat transfer coefficient of 65 W/m2 K and the tabulated average properties are given. (a) If the outlet temperature of the oil is 60°C, determine the total heat transfer and the outlet temperature of the water.(b) How long must the tube be made if the outlet temperature of the oil is 60°C?(c) Explain and discuss with the use of diagrams the difference between parallel and counter flow heat exchangers?(d)If the heat exchanger is changed to a parallel flow heat exchanger, how long must the tube be made if the outlet temperature of the oil is 60°C? To, outTo, in = 100°cK OiLm = 0.2kg/sWater >mw=0-15kg5LTw, outTwin =30°℃(a) If the outlet temperature of the oil is 60°C, determine the total heat transfer and the outlettemperature of the water.(b) How long must the tube be made if the outlet temperature of the oil is 60°C?(c) Explain and discuss with the use of diagrams the difference between parallel and counter flow heatexchangers?(d) If the heat exchanger is changed to a parallel flow heat exchanger, how long must the tube be madeif the outlet temperature of the oil is 60°C? Task 2A heat exchanger that is used for cooling lubricating oil is comprised of a thin-walled inner tube of 30mm diameter carrying water and an outer tube of 50 mm diameter carrying the oil. The exchangeroperates in counterflow mode with an overall heat transfer coefficient of 65 W/m² K and the tabulatedaverage properties are given.PropertiesWaterOilp (kg/m³)10004200Cp (J/kg K)v (m²/s)7 x 10-7k (W/m .K)0.64Pr4.780019001 × 10-50.134140

Diameter of inner tube, d1=30 mm=0.030 mDiameter of outer tube, d2=50 mm=0.050 mOverall heat…

A heat exchanger that is used for cooling lubricating oil is comprised of a thin-walled inner tube of 30 mm diameter carrying water and an outer tube of 50 mm diameter carrying the oil. The exchanger operates in counterflow mode with an overall heat transfer coefficient of 65 W/m2 K and the tabulated average properties are given. (a) If the outlet temperature of the oil is 60°C, determine the total heat transfer and the outlet temperature of the water. (b) How long must the tube be made if the outlet temperature of the oil is 60°C? (c) Explain and discuss with the use of diagrams the difference between parallel and counter flow heat exchangers? (d)If the heat exchanger is changed to a parallel flow heat exchanger, how long must the tube be made if the outlet temperature of the oil is 60°C?

A heat exchanger that is used for cooling lubricating oil is comprised of a thin-walled inner tube of 30 mm diameter carrying water and an outer tube of 50 mm diameter carrying the oil. The exchanger operates in counterflow mode with an overall heat transfer coefficient of 65 W/m2 K and the tabulated average properties are given. (a) If the outlet temperature of the oil is 60°C, determine the total heat transfer and the outlet temperature of the water. (b) How long must the tube be made if the outlet temperature of the oil is 60°C? (c) Explain and discuss with the use of diagrams the difference between parallel and counter flow heat exchangers? (d)If the heat exchanger is changed to a parallel flow heat exchanger, how long must the tube be made if the outlet temperature of the oil is 60°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 10.1P: 10.1 In a heat exchanger, as shown in the accompanying figure, air flows over brass tubes of 1.8-cm...

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10.1 In a heat exchanger, as shown in the accompanying figure, air flows over brass tubes of 1.8-cm 1D and 2.1-cm OD containing steam. The convection heat transfer coefficients on the air and steam sides of the tubes are , respectively. Calculate the overall heal transfer coefficient for the heal exchanger (a) based on the inner tube area and (b) based on the outer tube area.
Task 2 A heat exchanger that is used for cooling lubricating oil is comprised of a thin-walled inner tube of 30 mm diameter carrying water and an outer tube of 50 mm diameter carrying the oil. The exchanger operates in counterflow mode with an overall heat transfer coefficient of 65 W/m² K and the tabulated average properties are given. Properties P (kg/m²) (J/kg-K) ▸ (m²/s) k (W/m K) Pr Page 6 of 8 Water 1000 4200 7 x 107 0.64 4.7 Oil 800 1900 1 x 10-5 0.134 140 Join = 100°c OiL m = 0.2kg/s To, out tr Water> mw=0-15kg, S Twin = L Tw, out 30°℃ (a) If the outlet temperature of the oil is 60°C, determine the total heat transfer and the outlet temperature of the water. (b) How long must the tube be made if the outlet temperature of the oil is 60°C? (c) Explain and discuss with the use of diagrams the difference between parallel and counter flow heat exchangers? (d)If the heat exchanger is changed to a parallel flow heat exchanger, how long must the tube be made if the outlet temperature…
Task 2 A heat exchanger that is used for cooling lubricating oil is comprised of a thin-walled inner tube of 30 mm diameter carrying water and an outer tube of 50 mm diameter carrying the oil. The exchanger operates in counterflow mode with an overall heat transfer coefficient of 65 W/m² K and the tabulated average properties are given. Properties Water Oil p (kg/m³) 1000 4200 Cp (J/kg-K) v (m²/s) 7 x 10-7 k (W/m .K) 0.64 4.7 Pr 800 1900 1 × 10-5 0.134 140
5. Hot exhaust gases, which enter a finned-tube, cross-flow heat exchanger at 300 °C and leave at 100 °C, are used to heat pressurized water at a flow rate of 1 kg/s from 35 °C 125 °C. The specific heat of water at the average water temperature is 4197 J/kg. K. The overall heat transfer coefficient based on the gas-side surface area is Uh = 100 W/m².K. Determine the required gas-side surface area A₁ using the LMTD and & -NTU method.
YOuTube Çevir Omail S Community Downl... A Haritalar Okuma listesi iş İÇİN Giriş yap 口4 INGİLİZCE Cold water entering an opposing flow heat exchanger at a flow rate of 0.6 kg/s at 20 oC (cp =4180 J/kg.K) with a flow rate of 0.75 kg/s of oil (cp 2200 J/kg.K) it is used for cooling from 110 OC to 85 oC. If the total heat transfer coefficient is 800 W/m2.lf K, What is the heat transfer area of the heat exchanger? Çeviri yap: Google Bing
1a. Why does a “mixed” or “unmixed” fluid arrangement influence heat-exchanger performance? with example
5. Hot exhaust gases, which enter a finned-tube, cross-flow heat exchanger at 300 °C and leave at 100 °C, are used to heat pressurized water at a flow rate of 1 kg/s from 35 °C 125 °C. The specific heat of water at the average water temperature is 4197 J/kg. K. The overall heat transfer coefficient based on the gas-side surface area is U₁ = 100 W/m².K. Determine the required gas-side surface area A₁ using the LMTD and & -NTU method.
1) For a concentric counter-flow heat exchanger, hot oil is coming in the tube of the shell/tube heat exchanger and it's cooled by water that surrounds it in the shell. Calculate what is the required length of the heat exchanger tube in order to perform the necessary cooling. Assume there is negligible heat loss to the surroundings and negligible conductive heat resistance between the two fluids. Mass flow rate of oil = 0.17 kg/s Oil heat capacity = 2375 J/kg-ºC Oil convective heat transfer coefficient = 39.7 W/m²-°C Oil enters tube at temperature = 130 °C Oil leaves tube at temperature = 83 °C Water convective heat transfer coefficient = 2190 W/m²-°C Water enters shell at temperature 15 °C Water leaves shell at temperature = 74 °C Inner diameter = 4.5 cm Outer diameter = 6.5 cm
In a heat exchanger, water flows through a long copper tube (inside diameter 2.2 cm) with an average velocity of 2.13 m/s. The water is heated by steam condensing at 150 degree celsius on the outside of the tube. Water enters at 15 degree Celsius and leaves at 60 degree Celsius . What is the heat transfer coefficient, h, for the water? Write the given, required and solution
For an exhaust valve, the mass flow rate through the valve is 1.26 kg/s. The flow coefficient is 0.65 and the cylinder pressure and temperature are 625 kPa and 820 K. Assume exhaust system pressure is 103 kPa, the specific heat ratio is 1.4 and R =287J/ kg.K. The effective area of the valve is (SI unit): Select one: O a. 3.45*10-2 O b. 0.85*10-2 O c. 2.2*10-3 O d. 1.85*10-3 O e. 1.42*10-3