i just need F, G, H answered! There is a tubular heat exchanger with the outer tube radius of 4cm, the inner tube radius of 2 cm, and the length of 15 m. Yourgoal is to process milk at a rate of 3 kg/s. The inlet temperaturesof milk and hot water are 4 °C and 90 °C, respectively. Thespecific heat capacity of water is 4.19 kJ/(kg °C), and thespecific heat capacity of the milk is 4.0 kJ/(kg °C).a. If you are using a con-current flow with a water flow rate of6 kg/s, the outlet temperature of hot water is measured at70.13 °C. What is the outlet temperature of the milk? Showyour calculation steps and compare your result with thatgiven by the virtual experiment.b. If you are using a counter-current flow, the outlettemperatures of hot water and milk are measured at 68.78and 48.46 °C, respectively. What is the flow rate of water?Show your calculation steps. Try these conditions, andcompare the temperatures with the result given by thevirtual experiment.c. During this pasteurization process, what is the energy ofwater used? Sensible heat or latent heat?d. What are the heat transfer rates, respectively, for these twoflow directions? Compare the results and identify whichflow direction is more efficient.e. Calculate the log mean temperature difference (LMTD) forthe two conditions. Compare the results and identify whichflow direction has a higher LMTD? f. Calculate the overall heat transfer coefficient (U) for twoconditions. Are the two U values same?g. From your calculated U and ATm which one of the twoIm,parameters is influencing the heat exchanger efficiency?h. If you want to heat the milk from 4 to 60 °C. How can youchange the heat exchanger (e.g., length) or the operationconditions (e.g., flow rate, temperatures, etc.) to achievethis goal?i. If you increase the length of the tube, will the overall heattransfer coefficient U change? Explain why?j. Ifyouincrease the flow rate of milk, will U change? Explainwhy?k. Are there any situations when a con-current flow optionmay be preferred instead of a counter-current flow heatexchanger?1. After a long time of use, the heat exchange is fouled insidethe pipe. How does the fouling influence your milkpasteurization, and what actions can you take to achieveyour pasteurization goal? Explain from both the heattransfer and fluid flow aspects.

Answered: Image /qna-images/answer/f6ad40a7-655f-493d-b7f7-6b23dd7a45cd.jpg

f. Calculate the overall heat transfer coefficient (U) for two conditions. Are the two U values same? g. From your calculated U and ATm. which one of the two parameters is influencing the heat exchanger efficiency? h. If you want to heat the milk from 4 to 60 °C. How can you change the heat exchanger (e.g., length) or the operation conditions (e.g., flow rate, temperatures, etc.) to achieve this goal?

f. Calculate the overall heat transfer coefficient (U) for two conditions. Are the two U values same? g. From your calculated U and ATm. which one of the two parameters is influencing the heat exchanger efficiency? h. If you want to heat the milk from 4 to 60 °C. How can you change the heat exchanger (e.g., length) or the operation conditions (e.g., flow rate, temperatures, etc.) to achieve this goal?

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

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