Water (cp = 4180 J/kg·K) is to be heated by solar-heated hot air (cp = 1010 J/kg·K) in a double-pipe counter-flow heat exchanger. Air enters the heat exchanger at 102°C at a rate of 0.3 kg/s, while water enters at 25°C at a rate of 0.1 kg/s. The overall heat transfer coefficient based on the inner side of the tube is given as 80 W/m2·K. The length of the tube is 12 m and the internal diameter of the tube is 1.2 cm.Determine the outlet temperature of water. (Round the answer to a single decimal place.)The outlet temperature of water is ______ °C. Effectiveness can be determined from the following table.Heat exchanger typeEffectiveness relation1 Double pipe:Parallel-flowCounter-flow2 Shell-and-tube:One-shell pass2, 4,...tubepassesn-shell passes2n, 4n, ... tubepasses3 Cross-flow(single-pass)Both fluidsunmixedCmax mixed,Cmin unmixedCmin mixed,Cmax unmixed4 All heat exchangerswith c-08 =8-1 - exp [-NTU(1 + c)]1 + c1-exp [-NTU(1- c)]c exp[-NTU(1 c)])1NTU1 + NTU(for c= 1)e-1-exp4-2{1+0+v0-1&n=· [( ²₁ - ²)² - ¹ ] [( ¹₁ - )" -] ¹81NTU⁰.22C(for c < 1)8-1-exp& = 1- exp(-NTU)1+ exp -NTU, V1 + c²c².1- exp-NTU, V1+ c²- [exp(-CNTU078) - 11}e = (1 - exp(-cf1 - exp (-NTU)]})p{-11 - exp (-C NTU)]}-1

Answered: Image /qna-images/answer/18dace29-78ba-45b4-aff7-eb85165590db.jpg

Water (cp = 4180 J/kg·K) is to be heated by solar-heated hot air (cp = 1010 J/kg·K) in a double-pipe counter-flow heat exchanger. Air enters the heat exchanger at 102°C at a rate of 0.3 kg/s, while water enters at 25°C at a rate of 0.1 kg/s. The overall heat transfer coefficient based on the inner side of the tube is given as 80 W/m2·K. The length of the tube is 12 m and the internal diameter of the tube is 1.2 cm. Determine the outlet temperature of water. (Round the answer to a single decimal place.) The outlet temperature of water is ______ °C.

Water (cp = 4180 J/kg·K) is to be heated by solar-heated hot air (cp = 1010 J/kg·K) in a double-pipe counter-flow heat exchanger. Air enters the heat exchanger at 102°C at a rate of 0.3 kg/s, while water enters at 25°C at a rate of 0.1 kg/s. The overall heat transfer coefficient based on the inner side of the tube is given as 80 W/m2·K. The length of the tube is 12 m and the internal diameter of the tube is 1.2 cm. Determine the outlet temperature of water. (Round the answer to a single decimal place.) The outlet temperature of water is ______ °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 10.41P

See similar textbooks

Similar questions

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.
Water flowing in a long, aluminum lube is to be heated by air flowing perpendicular to the exterior of the tube. The ID of the tube is 1.85 cm, and its OD is 2.3 cm. The mass flow rate of the water through the tube is 0.65kg/s, and the temperature of the water in the lube averages 30C. The free-stream velocity and ambient temperature of the air are 10m/sand120C, respectively. Estimate the overall heat transfer coefficient for the heat exchanger using appropriate correlations from previous chapters. State all your assumptions.
Mot water is used to heat air in a double-pipe heat exchanger as shown in the following sketch. If the heat transfer coefficients on the water side and on the air side are 550W/m2Kand55W/m2K respectively, calculate the overall heat transfer coefficient based on the outer diameter. The heat exchanger pipe is 5-cm, schedule 40 steel (k=54W/mK) with water inside.
Concentric tube heat exchanger (tubular or tube in tube) is used for a large industrial gas turbine. The dimensions and values are given. One of the steps is not required to find the required length of the HX, if the oil leaves at 60 C? Oil and water inlet temperatures are 100 and 30 C, respectively. Thermal entry length to validate the steps O None of the above Log mean temperature difference Reynolds number, Prandtl number and Nusselt number O Overall heat transfer coefficient
Concentric tube heat exchanger (tubular or tube in tube) is used for a large industrial gas turbine. The dimensions and values are given. One of the steps is not required to find the required length of the HX, if the oil leaves at 60 C? Oil and water inlet temperatures are 100 and 30 C, respectively. Log mean temperature difference Overall heat transfer coefficient Thermal entry length to validate the steps None of the above Reynolds number, Prandtl number and Nusselt number
In cars, the coolant cools down the engine and prevents overheating. By absorbing heat from the engine, the coolant becomes heated. The coolant is then cooled down by the radiator. A primitive car radiator can be considered an unmixed crossflow heat exchanger where cold air from the outside serves as cold fluid that cools down the hot coolant. Assume the average specific heat of air and the coolant are, respectively, 1007 J/kg-K and 3300 J/kg.K. The coolant enters the radiator at 120°C and exits at 50°C. The mass flow rate of the coolant is 0.4 kg/s. The air intake temperature is 20°C and you measured the outlet temperature of the air to be 40°C. What is the effectiveness of this radiator? What is the UA of this radiator?
Concentric tube heat exchanger (tubular or tube in tube) is used for a large industrial gas turbine. The dimensions and values are given. One of the steps is not required to find the required length of the HX, if the oil leaves at 60 C? Oil and water inlet temperatures are 100 and 30 C, respectively. Log mean temperature difference Thermal entry length to validate the steps Overall heat transfer coefficient Reynolds number, Prandtl number and Nusselt number None of the given
A heat exchanger with an effectiveness of 75 percent is used to heat 5 kg/s of water from 2. ( 50 °C with condensing steam at 1 atm. Calculate the area for U = 1200 W/m2.°C. Suppose fouling occurred on both the tube and shell side with the following fouling factors, Rwater = 0.0002 m2-°C/W, and Risteam = 0.00009 m2. °C/W, what will be the new exiting temperature of the water?
PLZ I want full answer with all solution steps A heat exchanger is to be designed to heat 32/68 mixture of ethylene glycol and water from 24 °C to 55 °C by a hot water stream from 79 °C to 42 °C. Flow rate of cold stream is 20 kg/s. Inlet pressure for both stream is 50 psi and the maximum pressure drop of 10 psi for cold stream and 8 psi for hot water are permissible. Report valid assumptions made for the design and give required justification. Estimate i) Heat Transfer, Corrected LMTD, ii) Tube bundle diameter (Using TEMA standards and Codes) and Tube cross sectional area iii) Heat transfer coefficient iv) Overall heat transfer coefficient v) Pressure Drop (Shell side & Tube Side) note: Assume any values for the missing data
Steam condensing at 120°C (h, = 2203 kJ/kg) on the shell side of (1 shell and 12 thin-walled tubes) heat exchanger. Water (18 °C, C, =4180 J/kg-"C) enters the tube @ 3.4 kg/s ấnd the temperature difference between the two fluids at the exit is 57°C, assume LMTD correction factor of 1.0, for each tube: length = 2.7 m, diameter = 2.4 cm. What is the overall heat transfer coefficient (W/m¯.°C)? Select bne: O A. 2234.41 O B. 3859.43 C. 3385.47 D. 2979.21 E. 2606.81
Steam condensing at 120°C (h =2203 kJ/kg) on the shell side of (1 shell and 12 thin- walled tubes) heat exchanger. Water (18 °C, C_ =4180 J/kg-°C) enters the tube @ 3.3 kg/s and the temperature difference between fhe two Uuits at the exit is 55°C, assume LMTD correction factor of 1.0, for each tube: length =2.7 m, diamieter = 2.4 cm. What is the rate of condeusation of steam (kg/inin) Select one OA 17.66 OB.21.37 OC. 13.77 OD. 15.72 OE 1960
A cross-flow heat exchanger with air mixed and oil unmixed, (C. J/kg-°C, C, flow rate ratio (m°/m°) = 2.7. if the effectiveness of the heat exchanger is 61 % and the product of heat transfer surface area and the overall heat transfer coefficient is 673 W/°C, What is the mass flow rate of Oil “kg/min"? =1006 P. р air = 2150 J/kg.°C). The mass P_oil air oil Select one: А. 30.88 В. 22.09 C. 19.26 D. 25.21 E. 28.33