Problem 3.47
To maximize production and minimize pumping costs, crude oil is heated to reduce its viscosity during transportation from a production field. (a) Consider a pipe-in-pipe configuration consisting of concentric steel tubes with an intervening insulating material. The inner tube is used to transport warm crude oil through cold ocean water. The inner steel pipe (ks 35 W/mK) has an inside diameter of Di,1 150 mm and wall thickness ti 10 mm while the outer steel pipe has an inside diameter of Di,2 250 mm and wall thickness to ti . Determine the maximum allowable crude oil temperature to ensure the polyurethane foam insulation (kp 0.075 W/mK) between the two pipes does not exceed its maximum service temperature of Tp,max 70 C. The ocean water is at T,o 5 C and provides an external convection heat transfer coefficient of ho 500 W/m2 K. The convection coefficient associated with the flowing crude oil is hi 450 W/m2 K. (b) It is proposed to enhance the performance of the pipe-in-pipe device by replacing a thin (ta 5 mm) section of polyurethane located at the outside of the inner pipe with an aerogel insulation material (ka 0.012 W/m K). Determine the maximum allowable crude oil temperature to ensure maximum polyurethane temperatures are below Tp,max 70 C
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ENGR 121 B Lecture Notes for 9/19/2016 Spencer Kociba Summary of Lecture: beginning to understand the vocabulary and functions in MATLAB and how we will use MATLAB and BlackBoard Learn to turn in assignments, take quizzes, etc. Goal of the course: learn to THINK like a programmer aka step by step problem solving. Problem solving techniques: ● Plan ● Restate the problem ● Divide the problem into steps or subproblems to solve ● Reduce/Simplify the problem (ex. Global scale>local scale) ● Look for similarities to other previously solved problems ○ Emotional attachment/familiarity with an idea or concept improves your memory and ability to recall information when needed ● Ex
The answer to “To maximize production and minimize pumping costs, crude oil is heated to reduce its viscosity during transportation from a production field. (a) Consider a pipe-in-pipe configuration consisting of concentric steel tubes with an intervening insulating material. The inner tube is used to transport warm crude oil through cold ocean water. The inner steel pipe (ks 35 W/mK) has an inside diameter of Di,1 150 mm and wall thickness ti 10 mm while the outer steel pipe has an inside diameter of Di,2 250 mm and wall thickness to ti . Determine the maximum allowable crude oil temperature to ensure the polyurethane foam insulation (kp 0.075 W/mK) between the two pipes does not exceed its maximum service temperature of Tp,max 70 C. The ocean water is at T,o 5 C and provides an external convection heat transfer coefficient of ho 500 W/m2 K. The convection coefficient associated with the flowing crude oil is hi 450 W/m2 K. (b) It is proposed to enhance the performance of the pipe-in-pipe device by replacing a thin (ta 5 mm) section of polyurethane located at the outside of the inner pipe with an aerogel insulation material (ka 0.012 W/m K). Determine the maximum allowable crude oil temperature to ensure maximum polyurethane temperatures are below Tp,max 70 C” is broken down into a number of easy to follow steps, and 212 words. Introduction to Heat Transfer was written by and is associated to the ISBN: 9780470501962. Since the solution to 3.47 from 3 chapter was answered, more than 448 students have viewed the full step-by-step answer. This full solution covers the following key subjects: . This expansive textbook survival guide covers 13 chapters, and 1422 solutions. The full step-by-step solution to problem: 3.47 from chapter: 3 was answered by , our top Engineering and Tech solution expert on 09/27/17, 04:59PM. This textbook survival guide was created for the textbook: Introduction to Heat Transfer, edition: 6.
