To maximize production and minimize pumping costs, crude oil is heated to reduce its viscosity during transportation from a production field. (1) 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 = 40 W/m-K) has an inside diameter of Di, 1 = 150 mm and wall thickness t; = 20 mm while the outer steel pipe has an inside diameter of D2 = 250 mm and wall thickness, = 1,. Determine the maximum allowable crude oil temperature to ensure the polyurethane foam insulation (k, = 0.0425 W/m.K) between the two pipes does not exceed its maximum service temperature of Tp, max = 70°C. The ocean water is at Too, o ho T = -5°C and provides an external convection heat transfer coefficient of h = 500 W/m²K. The convection coefficient associated with the flowing crude oil is h₁ = 450 W/m²K. (2) It is proposed to enhance the performance of the pipe-in-pipe device by replacing a thin (t = 10 mm) section of polyurethane located at the outside of the inner pipe with an aerogel insulation material (k = 0.012 W/m-K). Determine the maximum allowable crude oil temperature to ensure maximum polyurethane temperatures are below T p. max=70°C. Physical Properties Mathematical Functions Step 1 Determine the convection heat transfer resistance on the inside of the pipe per unit length, in m·K/W. R' 1,conv.i i m-K/W Save for Later Step 2 Attempts: unlimited Submit Answer Determine the conduction resistance of the polyurethane per unit length without the aerogel, in m·K/W. R' 1,cond,p = i m-K/W Step 3 Determine the conduction resistance of the polyurethane per unit length when aerogel is used, in m·K/W. R' t,cond,p,ae Save for Later Step 4 m.K/W Attempts: unlimited Submit Answer Determine the maximum crude oil temperature if no aerogel is used, in °C. T∞ = i Save for Later Step 5 °C Attempts: unlimited Submit Answer Determine the maximum crude oil temperature if aerogel is used, in °C. Too, ae i eTextbook and Media °C Save for Later
To maximize production and minimize pumping costs, crude oil is heated to reduce its viscosity during transportation from a production field. (1) 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 = 40 W/m-K) has an inside diameter of Di, 1 = 150 mm and wall thickness t; = 20 mm while the outer steel pipe has an inside diameter of D2 = 250 mm and wall thickness, = 1,. Determine the maximum allowable crude oil temperature to ensure the polyurethane foam insulation (k, = 0.0425 W/m.K) between the two pipes does not exceed its maximum service temperature of Tp, max = 70°C. The ocean water is at Too, o ho T = -5°C and provides an external convection heat transfer coefficient of h = 500 W/m²K. The convection coefficient associated with the flowing crude oil is h₁ = 450 W/m²K. (2) It is proposed to enhance the performance of the pipe-in-pipe device by replacing a thin (t = 10 mm) section of polyurethane located at the outside of the inner pipe with an aerogel insulation material (k = 0.012 W/m-K). Determine the maximum allowable crude oil temperature to ensure maximum polyurethane temperatures are below T p. max=70°C. Physical Properties Mathematical Functions Step 1 Determine the convection heat transfer resistance on the inside of the pipe per unit length, in m·K/W. R' 1,conv.i i m-K/W Save for Later Step 2 Attempts: unlimited Submit Answer Determine the conduction resistance of the polyurethane per unit length without the aerogel, in m·K/W. R' 1,cond,p = i m-K/W Step 3 Determine the conduction resistance of the polyurethane per unit length when aerogel is used, in m·K/W. R' t,cond,p,ae Save for Later Step 4 m.K/W Attempts: unlimited Submit Answer Determine the maximum crude oil temperature if no aerogel is used, in °C. T∞ = i Save for Later Step 5 °C Attempts: unlimited Submit Answer Determine the maximum crude oil temperature if aerogel is used, in °C. Too, ae i eTextbook and Media °C Save for Later
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
Related questions
Question
Expert Solution
This question has been solved!
Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.
Step by step
Solved in 2 steps with 3 images
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