Q#01: Write a short note on the following:a) What are the best possible solutions to increase the heat transfer rate of a body?b) Which material will transfer more heat? Either a material with thermal conductivity k =121"/mec or k= 22.WLmog: Justify your answer.m°Cc) Explain the Fouling phenomenon. What is the effect of fouling on heat transfer rate?d) Which of the following Fins/Heat exchanger will transfer more heat and why? Justifyyour answer.i.Flat plate.ii.Circular/pin fins.iii.Triangular fins.

Required: a) The best possible solution to increase the heat transfer rate. b) Material with k=121…

Write a short note on the following: What are the best possible solutions to increase the heat transfer rate of a body? Which material will transfer more heat? Either a material with thermal conductivity k = 121"/mec or k= 22.Wmo6. Justify your answer. Explain the Fouling phenomenon. What is the effect of fouling on heat transfer rate?

Write a short note on the following: What are the best possible solutions to increase the heat transfer rate of a body? Which material will transfer more heat? Either a material with thermal conductivity k = 121"/mec or k= 22.Wmo6. Justify your answer. Explain the Fouling phenomenon. What is the effect of fouling on heat transfer rate?

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 10.6P: Mot water is used to heat air in a double-pipe heat exchanger as shown in the following sketch. If...

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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.
A) An intern has to estimate the purchased equipment cost (PEC) of a new heat exchanger. The company recently purchased a smaller exchanger (Area = 250 m2) for $22,000. What is the PEC of a new heat exchanger (Area = 500 m2)? Use the 6/10 rule in your calculation
1 please explain well in type form thank you Why does a “mixed” or “unmixed” fluid arrangement influence heat-exchanger performance?
In the United States, energy for household heating is generally sold using English units, e.g., therm, gal, and cord. A house in Wisconsin uses 1200 therms of thermal energy during the heating season. Calculate the cost of fuel if the furnace uses (a) natural gas with an efficiency of 70%; (b) No. 2 fuel oil, efficiency 65%; (c) kerosene, efficiency 99.9% (unvented); and (d) wood with l5% moisture with an efficiency of 50%. Use the data in Tables 2.2, 2.7, and 2.13. The efficiencies are based on the HHV. Assume the cost of natural gas is $8/MBtu, the cost of No. 2 fuel oil is $3/gal, the cost of kerosene is $3.50/gal, and the cost of wood is $100/cord. Assume the bulk density of cord wood is 30 lbm/ft3 .
An air-cooled condenser has an h value of 30 W/m2-K based on the air-side area. The air-side heat transfer area is 190 m2 with air entering at 27°C and leaving at 40°C. If the condensing temperature is constant at 49°C, what is the air mass flow rate in kg/s? Let Cp(air) = 1.006 kJ/kg-K. Draw and label the temperature-flow diagram. Round off your answer to three (3) decimal places.
Completely solve and provide the diagram. Box the final answer. Write legibly 3. A single-pass tubular type heat exchanger heats air from 38°C to 80°C. Exhaust gas from DIESEL engine at 350°C is used as heating medium. If the final temperature of exhaust gas leaving the heat exchanger is 140°C, what is the LMTD?
Steam is produced in the copper tubes (k =223 Btu/h · ft · °F) of a heat exchanger at a temperature of 250°F by another fluid condensing on the outside surfaces of the tubes at 350°F. The inner and outer diameters of the tube are 1 in. and 1.3 in., respectively. When the heat exchanger was new, the rate of heat transfer per foot length of the tube was 2x104 Btu/h.(a) Determine the rate of heat transfer per foot length of the tube when a 0.01-in.-thick a layer of limestone (k =1.7 Btu/h·ft·°F) has formed on the inner surface of the tube after extended use.(b) Assuming that a 0.01-in.-thick limestone layer has formed on both the inner and outer surfaces of the tube
Steam is produced in the copper tubes (k =223 Btu/h · ft · °F) of a heat exchanger at a temperature of 250°F by another fluid condensing on the outside surfaces of the tubes at 350°F. The inner and outer diameters of the tube are 1 in. and 1.3 in., respectively. When the heat exchanger was new, the rate of heat transfer per foot length of the tube was 2x104 Btu/h. (a) Determine the rate of heat transfer per foot length of the tube when a 0.01-in.-thick layer of limestone (k =1.7 Btu/h·ft·°F) has formed on the inner surface of the tube after extended use. (b) Assuming that a 0.01-in.-thick limestone layer has formed on both the inner and outer surfaces of the tube. Answer: 1.45x104 Btu/h; 1.20x104 Btu/h
Heat Transfer - Fins See attached. Please assist.
Find the duty of this heat exhanger when new: Q6: Say we have a heat exchanger made to heat 150 liters/minute from 20 degrees celsius to 80 degrees celsius. Each section of the heat exchanger, which is a circular pipe, is 10m long. The outer diameter is 2in, and the thickness of the pipe is 1 / 8 inch. As the heat exchanger is operated, lime is built up known as fouling. The heat exahnger uses N number of pipes, where water passes through the pipe and hot gas is on the outside. k(foul) = 0.5 W/mK, K(foul) increases at 1mm/year, however there is no lime build up initially because the heat exchanger is new. Steel thermal conductivity is k(steel) = 50 W/mK while the convection coefficient between the water in the tube and the inside wall of the pipe is 1000 W/m^2K, and the convection coefficient of the outside pipe and hot gas is 100 W/m^2K.
2. In a counterflow double-pipe heat exchanger, the hot fluid enters at 149°C and exits at 76°C. The cold fluid enters at 33°C and exits at 87°C. What is the heat exchanger effectiveness? Express your answer as a decimal value.
Derive an equation for the rate of heat transfer.