GA double-pipe heat exchanger willbe used to cool a hot stream (ininner pipe, ID 2.067 in, OD=2.375 in) from 350°F to 250°F byheating a cold stream (in annulus,ID 4.05 in) from 80°F to 120°F. Ifthe heat-transfer coefficients are hi= 200 and ho=350 Btu/h. ft² °F,calculate the wall temperature ofinner pipe.=

The objective of this question is to calculate the wall temperature of the inner pipe in a…

Answered: G A double-pipe heat exchanger will be…

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

See similar textbooks

Similar questions

You are then asked by your supervisor to design a concentric tube heat exchanger to operate under the following conditions: Cold Fluid m = 0.125 kg/s Cp 4200 J/kgK T₁ = 40°C To = 95°C Hot Fluid: m = 0.125 kg/s Cp = 2100 J/kgK T₁ = 210°C If the heat exchanger is characterised by uniform overall heat transfer coefficient, using the LMTD method, determine: e) The maximum possible heat transfer rate. f) The heat exchanger effectiveness. g) The ratio of the heat transfer area under parallel flow to the heat transfer area under counter flow. Comment on the answer.
A power plant condenser (heat exchanger) trans- fers 100 MW from steam running in a pipe to sea- water being pumped through the heat exchanger. The wall separating the flows is 4 mm of steel, with k = 15 W/m K, and it has 7°C difference between the two fluids. Find the required area of the heat exchanger.
4. The following heat exchanger uses 10 kg/s of hot air to heat and boil liquid water into saturated steam at 500 kPa. (a) Find the steam flow (kg/s) (b) Determine whether the process is allowed by the second law (Answer: It is not!) (c) On the surface, the process looks OK as Tair>Twater at both the inlet and outlet. You should be able to see the problem if you sketch the air and the water temperature profiles as you move left to right through the exchanger. (Hints: The air will be essentially a straight line, while the water will not. For the water, think about what happens when it is changing phase.) This is called a pinch point violation, and it is a very important design consideration in advanced combined cycle systems and in nuclear power plants. Air 100 kPa 160°C 10 kg/s Saturated Vapor 500 kPa Air: 160°C Steam: 151.8°C Q Air 100 kPa 30°C Liquid Water 500 kPa, 20°C Air: 30°C Water: 20°C
copper determine the overall heat transfer coefficient of a condenser formed of pipe when the fluid-side heat-transfer coefficient is 2000 W/m². °C and the heat-transfer coefficient on the refrigerant side is 1200 W/m². °C. The pipe has an outside diameter of 25.4 mm and an inside diameter of 19.8 mm. The thermal conductivity of steel is (410) W/m °C.
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 70 ℃ by geothermal water that enters the heat exchanger at 155 ℃ 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. 25.4 m b. 30.5 m c. 20.7 m d. 27.5 m
In a large student house in Sheffield, cold water is supplied by the mains water supply at a pressure of 2 bar, gauge, and at a temperature 10°C. A wash basin cold tap is located 3 meters above the mains supply, connected to the mains pipe with a copper pipe of internal diameter 15 mm and length 12 meters. When the tap is opened the flow rate of water out of the tap is 24 litres per minute, creating a Fanning friction factor in the pipe of 0.008. a) Calculate the Reynolds number of the water in the pipe and determine if it is laminar or turbulent.
Water (Cp = 4200 J/kg- °C) is used cool an unknown fluid (with a given Cp = 3810 J/kg.ºC) using a two-pass parallel flow double-pipe heat exchanger. The unknown fluid enters the heat exchanger at 66 °C with a flowrate of 1.46 kg/s. Water can be supplied at 10 °C and 1.32 kg/s. If the heat exchanger cool the unknown fluid to 39 °C, then the NTU of this heat exchanger is equal to O 0.79 1.59 O 3.18 O 4.77
I have the following problem, and my solution is shown in the image, is it correct? Please verify the calculations You have been asked to design a heat exchanger to pasturize milk by raising it from 4°C to 72°C. The milk will be run through the heat exchanger at a flow rate of 15 liters/second. To create the heat exchanger, milk will flow through tubes with a 1.2 cm diameter. The tubes will be kept at a constant surface temperature through exposure to condensing steam at 100°C. You have been asked to calculate the following: • A single tube design – You must specify:∗ The length of the tube ∗ Average milk velocity∗ The pressure drop required to operate the exchanger∗ Give at least two reasons why a single tube heat exchanger is not feasible
A=12 B=12 C=7 D=7
Need answer ASAP In a counter-current-flow tubular heat exchanger, a liquid food (milk),flowing in the inner pipe, is heated from 20 to 40°C. In theouter pipe the heating medium (water) cools from 90 to50°C. The overall heat-transfer coefficient based on the insidediameter is 2000 W/(m^2-°C). The inside diameter is 5 cm andlength of the heat exchanger is 10 m. The average specific heatof water is 4.181 kJ/(kg-°C). Calculate the mass flow rate ofwater in the outer pipe. Compare the amount of milk being heated to concurrent design.
Help needed with heat exchanger question
A long, thin-walled double-pipe heat exchanger with tube and shell diameters of 0.01 m and 0.025 m, respectively, is used to condense refrigerant-134a with water at 20°C. The refrigerant flows through the tube, with a convection heat transfer coefficient of hi= 4100 W/m² °C. Water flows through the shell at a rate of 0.3 kg/s. The thermal resistance of the inner tube is negligible since the tube material is highly conductive and its thickness is negligible. Both the water and refrigerant-134a flows are fully developed. Properties of the water and refrigerant-134a are constant. Water properties: p = 998 kg/m³, v=u/p-1.004x 10-6 m²/s, k = 0.598 W/m. °C, Pr = 7.01 Cold water D Do

Recommended textbooks for you

Elements Of Electromagnetics

Mechanical Engineering

ISBN:

9780190698614

Author:

Sadiku, Matthew N. O.

Publisher:

Oxford University Press

Mechanics of Materials (10th Edition)

Mechanical Engineering

ISBN:

9780134319650

Author:

Russell C. Hibbeler

Publisher:

PEARSON

Thermodynamics: An Engineering Approach

Mechanical Engineering

ISBN:

9781259822674

Author:

Yunus A. Cengel Dr., Michael A. Boles

Publisher:

McGraw-Hill Education

Elements Of Electromagnetics

Mechanical Engineering

ISBN:

9780190698614

Author:

Sadiku, Matthew N. O.

Publisher:

Oxford University Press

Mechanics of Materials (10th Edition)

Mechanical Engineering

ISBN:

9780134319650

Author:

Russell C. Hibbeler

Publisher:

PEARSON

Thermodynamics: An Engineering Approach

Mechanical Engineering

ISBN:

9781259822674

Author:

Yunus A. Cengel Dr., Michael A. Boles

Publisher:

McGraw-Hill Education

Control Systems Engineering

Mechanical Engineering

ISBN:

9781118170519

Author:

Norman S. Nise

Publisher:

WILEY

Mechanics of Materials (MindTap Course List)

Mechanical Engineering

ISBN:

9781337093347

Author:

Barry J. Goodno, James M. Gere

Publisher:

Cengage Learning

Engineering Mechanics: Statics

Mechanical Engineering

ISBN:

9781118807330

Author:

James L. Meriam, L. G. Kraige, J. N. Bolton

Publisher:

WILEY

SEE MORE TEXTBOOKS