This problem is designed to practice the calculation of convection coefficients for internal flow. You are tasked with designing a water heating system that will heat water flowing at 1 kg/s from 10°C to 40°C. You have two heated ducts to choose from:(a) A duct with a rectangular cross-section of 0.6 m × 1.2 m.(b) A duct with a 15 cm diameter circular pipe.Both ducts are maintained at a constant temperature of 60°C. Assuming fully developed flow in both cases, compare the lengths required for the two ducts to achieve the desired water temperature. Also, comment on whether the fully-developed assumption is justifiable in both cases.

Answered: Image /qna-images/answer/ba5df748-0977-45d3-8931-20a31cc2a6f0.jpg

This problem is for us to practice convection coefficient calculation for internal flow. You will have to design a water heating system that will heat up water flowing at 1 kg/s from 10°C to 40°C. You have to chose from two heated ducts - (a) one with rectangular cross-section of 0.6 mx1.2 m and (b) the other with 15 cm diameter circular pipe. Both ducts are maintained at a constant temperature of 60°C. Assuming that the flow is fully devloped in both cases, compare the length required for the two ducts to reach the deasired water temperature. Comment on whether the fully-developed assumption is justifiable in both cases.

This problem is for us to practice convection coefficient calculation for internal flow. You will have to design a water heating system that will heat up water flowing at 1 kg/s from 10°C to 40°C. You have to chose from two heated ducts - (a) one with rectangular cross-section of 0.6 mx1.2 m and (b) the other with 15 cm diameter circular pipe. Both ducts are maintained at a constant temperature of 60°C. Assuming that the flow is fully devloped in both cases, compare the length required for the two ducts to reach the deasired water temperature. Comment on whether the fully-developed assumption is justifiable in both cases.

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

Related questions

Q: 4. A car engine with the dimensions 0.6 m high, 0.50 m-wide, and 0.8-m- long. The bottom surface of…

A: Data given-

Q: Q5) Consider the heat transfer through an extended surface (a fin). Find temperature distributions…

Q: A 1.27-cm diameter copper (r = 8933 kg/m3, c = 385 J/(kg °C)) sphere is heated in a convection…

Q: Envision a solar water heater, a device which receives energy from the sun (solar radiation or…

Q: c) Water is to be heated from 10°C to 80°C as it flows through a 2-cm-internal-diameter, 7-m- long…

A: here 2 question are there, both are not interlinked and as per honor code and answering guidelines…

Q: was given this solution, Please advise on the solution

Q: Q4/ Steam at T1=320°C flows in a cast iron pipe (k=80W/m. C) whose inner and outer diameters are…

A: As per Bartleby's policy in case of multiple questions I can solve only first one. Please repost…

Q: For a water flow over a steel surface, the temperature of water at a specific location was found to…

A: To find-: The local convection coefficient at this location. Given-: The temperature of water at a…

Q: Estimate the heat exchanger area needed to cool 55,000 lb/hr of a light oil (specific heat = 0.74…

A: “Since you have posted a question with multiple sub parts, we will provide the solution only to the…

Q: For internal forced convection, friction factor f can be found by using either the Moody charts, the…

A: The Moody chart or Moody diagram (also Stanton diagram) is a graph in a non-dimensional form that…

Q: Q.32 Computer memory chips are mounted on a finned metallic mount to protect them from overheating.…

Q: can be modeled as a cir one end of the duct pus ure of 105 kPa, temperat ere is a heating element C…

Q: A hot gas at 300°C with convective heat transfer coefficient of 100 W/m²-K is flowing through an…

A: Given:Hot gas temperature, Tg=300oCConvective heat transfer coefficient of hot gas, hg=100…

Q: Please calculate the heat transfer rate (Btu/hr) from a horizontal pipe flow of water at 120 F…

A: Given Temperature, T1 = 120oF T2 = 70oF…

Q: Steam is condensed on a bundle of 500 tubes through which there is a flow of cold water. The outside…

A: Given: Outside diameter of the tube→Do=5 Cm=0.05 m Overall heat transfer coefficient→U=800 W/m2K…

Q: Consider a flow of water in a cylinder maintained at constant temperature of 1000 C, the diameter of…

Q: Problem 3: Insulation To=1 Toowwww Steam Tx2 T₂ T3 www www R₁ R₁ R₂ www.T R₂ Steam at Tx1 = 320 °C…

A: The objective of the question is to determine the temperature drops across the pipe and the…

Q: SUPPOSE THE AMBIENT TEMPERATURE IS 20degrees CELSIUS, AND THE HOT RESERVOIR CONSISTS OF A SPHERICAL…

Q: Calculate the volume of a fixed-dome-type biogas digester for the output of two cows. Also calculate…

A: Given data: The retention time is RT=40 days The dry matter produced m=2 kg/day/cow The biogas…

Q: Tony Stark, a brilliant inventor, has designed a special suit/armor that has an inbuilt small but…

Q: bb) Hot air at 60 °C leaving the furnace of a house enters a 12 m long section of a sheet metal duct…

Q: Q4/ Steam at To1-320°C flows in a cast iron pipe (k-80W/m. C) whose inner and outer diameters are…

A: As per Bartleby's policy in case of multiple questions I can solve only first one. Please repost…

Question

This problem is designed to practice the calculation of convection coefficients for internal flow. You are tasked with designing a water heating system that will heat water flowing at 1 kg/s from 10°C to 40°C. You have two heated ducts to choose from:

(a) A duct with a rectangular cross-section of 0.6 m × 1.2 m.
(b) A duct with a 15 cm diameter circular pipe.

Both ducts are maintained at a constant temperature of 60°C. Assuming fully developed flow in both cases, compare the lengths required for the two ducts to achieve the desired water temperature. Also, comment on whether the fully-developed assumption is justifiable in both cases.

Expert Solution

This question has been solved!

Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.

This is a popular solution!

SEE SOLUTION Check out a sample Q&A here

Step 1

Step 2

Step 3

Step 4

Step 5

Step 6

Trending now

This is a popular solution!

Step by step

Solved in 6 steps with 5 images

SEE SOLUTION Check out a sample Q&A here

Knowledge Booster

Learn more about

Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, mechanical-engineering and related others by exploring similar questions and additional content below.

Similar questions

Q5Two large containers A and B of the same size are filled with different fluids. The fluids in containers A and B are maintainedat 0° C and 100° C, respectively. A small metal bar, whose initial temperature is 100° C, is lowered into container A. After1 minute the temperature of the bar is 90° C. After 2 minutes the bar is removed and instantly transferred to the othercontainer. After 1 minute in container B, the temperature of the bar rises 10°. How long, measured from the start of theentire process, will it take the bar to reach 99.9° C?
(c) Find the maximum possible thermal efficiency for a heat engine operating between two reservoirs at 750°C and 27°C. (2 pts)
B-Water flows at Too 50 °C, hoo1 = 3500 W/m² ° C in a pipe with r₁= 1.25 cm, r₂ =1.33 cm and L= 1 m, the pipe has k= 16 W/m °C. The outside of the pipe is exposed to a fluid with Too2 = 20° C, hoo₂ 7.6 W/m² ° C. Calculate the rate of heat lost by the pipe and find the temperature of the pipe outer surface T₂. 0 3 + 6 f = =
Calculate the rate of infiltration heat loss of a room with a 150m^2 floor area and 3.6m high ceilings. Use an inside temperature of 20°C, an outside ambient temperature of 37.4°C, and an hourly ACH of 0.2 m^3. Assume the heat capacity of air is 0.717W/°C•m^2.
Question #7 Steam at 320°C flows in a stainless steel pipe (k-15W/m K) whose inner and outer diameter are 5cm and 5.5cm respectively. The pipe is covered with 3cm thick glass wool insulation (-0.038W/mK). Heat is lost to the surroundings at 5°C by natural convection and radiation, with a combined natural convection and radiation heat transfer coefficient of h 15W/m² K. Taking the heat transfer coefficient inside the pipe to be happe = outside pipe = 80 W/m²K. (A) Draw the schematic diagram of this problem and label all quantities. (B) Draw the thermal network diagram of this problem and label all thermal resistors and the direction of heat flow. (C) Determine the (i) inner surface area (ii) outer surface area (iii) inner thermal resis- tance (iv) outer thermal resistance (v) thermal resistance across pipe and (vi) thermal resistance across insulation. (D) Determine the total thermal resistance for the unit length of pipe. (E) Determine the rate of heat loss from the steam per unit…
A horizontal pipe with a constantdiameter of 0.04 mhas a skady flaw of Refnigerant 134a entering at 300 kla 40°C, and a mass flow rate of 0.6 kg/sec, and leaving at l 240 kla and 50°C Deteminethe magnitude of the rate Of heat transfer between the pipe and its Surroundungs in kW using 5 signifigant figures. quoLg SMt gunb ot pn
2. Air at 20° blows over a hot plate 50X60 cm made of carbon steel maintained at 220°. The convective heat transfer coefficient is 25W/m²K. What will be the heat loss from the plate in W?
Water at an average temperature of 23 deg C flows through a 10-cm diameter pipe that is 2.5 m long. The pipe wall is heated by steam and is held at 100 deg C. The convective heat transfer coefficient is 2.25 x 10^4 W/m^2K. Find the heat flow in W.
solve both, show all steps, assumptions, comments, and solutions
n electric generator at a power plant produces energy by passing superheated steam from a high temperature container (reservoir), through a pipe connected to a series of fans, and then into a low temperature reservoir. As the steam passes across the blades of the fans some of the heat energy of the steam is transformed into mechanical energy, which turns the fans which in turn are connected to a generator, which in turn converts the mechanical energy into electrical energy. If the high temperature steam has a temperature of 412.1 K and the low temperature reservoir has a temperature of 105.4 K, what is the Carnot efficiency of this process?
Hello Sir, Good Afternoon.I have a question in my homework related Heat Transfer lesson. The following below is my question. Please Advice, thank you.