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1. Oil is flowing inside % inch, 16 BWG, 20 foot long tube. The bulk oil temperature is 212 °F and the tube surf ace temperature is 122 °F. Calculate the convective heat transfer coefficient (hi) (a) For a fluid flow of 2000 lb/hr or velocity of 1715 ft/hr (b) For a fluid flow of 100 lb/hr Or velocity of 85.75 ft/hr Data: Cp- average fluid heat capacity= 0.65 Btu/Lb. °F K- average fluid thermal conductivity=D0.085 Btu/hr.ft.F, p-Average fluid Density= 60 lb/ft Hw- Fluid viscosity at 122 °F= 4.0 1b/ft.hr, u-Fluid viscosity at 212 °F= 1.95 lb/ft.hr

1. Oil is flowing inside % inch, 16 BWG, 20 foot long tube. The bulk oil temperature is 212 °F and the tube surf ace temperature is 122 °F. Calculate the convective heat transfer coefficient (hi) (a) For a fluid flow of 2000 lb/hr or velocity of 1715 ft/hr (b) For a fluid flow of 100 lb/hr Or velocity of 85.75 ft/hr Data: Cp- average fluid heat capacity= 0.65 Btu/Lb. °F K- average fluid thermal conductivity=D0.085 Btu/hr.ft.F, p-Average fluid Density= 60 lb/ft Hw- Fluid viscosity at 122 °F= 4.0 1b/ft.hr, u-Fluid viscosity at 212 °F= 1.95 lb/ft.hr

Introduction to Chemical Engineering Thermodynamics
Introduction to Chemical Engineering Thermodynamics
8th Edition
ISBN:9781259696527
Author:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Publisher:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Chapter1: Introduction
Section: Chapter Questions
Problem 1.1P
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### Problem Statement Oil is flowing inside a ¾ inch, 16 BWG, 20-foot-long tube. The bulk oil temperature is 212 °F and the tube surface temperature is 122 °F. Calculate the convective heat transfer coefficient (hi): #### For the following scenarios: 1. **A fluid flow of 2000 lb/hr or velocity of 1715 ft/hr** 2. **A fluid flow of 100 lb/hr or velocity of 85.75 ft/hr** #### Data Provided: - **Cp**: Average fluid heat capacity = 0.65 Btu/lb.°F - **K**: Average fluid thermal conductivity = 0.085 Btu/hr.ft.°F - **ρ**: Average fluid density = 60 lb/ft³ - **μw**: Fluid viscosity at 122 °F = 4.0 lb/ft.hr - **μ**: Fluid viscosity at 212 °F = 1.95 lb/ft.hr ### Explanation of Provided Data 1. **Cp (Average fluid heat capacity)**: This is the amount of heat (in Btu) required to raise the temperature of one pound of the fluid by one degree Fahrenheit. 2. **K (Average fluid thermal conductivity)**: This represents the ability of the fluid to conduct heat. It is measured in Btu per hour, per foot, per degree Fahrenheit. 3. **ρ (Average fluid density)**: This is the mass per unit volume of the fluid, given in pounds per cubic foot. 4. **μw (Fluid viscosity at 122 °F)**: This is a measure of the fluid's resistance to deformation at a specified temperature (122 °F), expressed in pounds per foot per hour. 5. **μ (Fluid viscosity at 212 °F)**: This indicates the viscosity of the fluid at the higher temperature of 212 °F, also measured in pounds per foot per hour. ### Graphs and Diagrams For the scenarios provided, no specific graphs or diagrams are included in the problem statement. In an actual educational context, it might be helpful to include diagrams of the tube and fluid flow dynamics, as well as graphs depicting the relationship between temperature, viscosity, and heat transfer coefficient for better understanding. ### Additional Considerations To solve this problem, the following heat transfer principles and equations are typically employed: - Reynolds number (Re) calculation -
Transcribed Image Text:### Problem Statement Oil is flowing inside a ¾ inch, 16 BWG, 20-foot-long tube. The bulk oil temperature is 212 °F and the tube surface temperature is 122 °F. Calculate the convective heat transfer coefficient (hi): #### For the following scenarios: 1. **A fluid flow of 2000 lb/hr or velocity of 1715 ft/hr** 2. **A fluid flow of 100 lb/hr or velocity of 85.75 ft/hr** #### Data Provided: - **Cp**: Average fluid heat capacity = 0.65 Btu/lb.°F - **K**: Average fluid thermal conductivity = 0.085 Btu/hr.ft.°F - **ρ**: Average fluid density = 60 lb/ft³ - **μw**: Fluid viscosity at 122 °F = 4.0 lb/ft.hr - **μ**: Fluid viscosity at 212 °F = 1.95 lb/ft.hr ### Explanation of Provided Data 1. **Cp (Average fluid heat capacity)**: This is the amount of heat (in Btu) required to raise the temperature of one pound of the fluid by one degree Fahrenheit. 2. **K (Average fluid thermal conductivity)**: This represents the ability of the fluid to conduct heat. It is measured in Btu per hour, per foot, per degree Fahrenheit. 3. **ρ (Average fluid density)**: This is the mass per unit volume of the fluid, given in pounds per cubic foot. 4. **μw (Fluid viscosity at 122 °F)**: This is a measure of the fluid's resistance to deformation at a specified temperature (122 °F), expressed in pounds per foot per hour. 5. **μ (Fluid viscosity at 212 °F)**: This indicates the viscosity of the fluid at the higher temperature of 212 °F, also measured in pounds per foot per hour. ### Graphs and Diagrams For the scenarios provided, no specific graphs or diagrams are included in the problem statement. In an actual educational context, it might be helpful to include diagrams of the tube and fluid flow dynamics, as well as graphs depicting the relationship between temperature, viscosity, and heat transfer coefficient for better understanding. ### Additional Considerations To solve this problem, the following heat transfer principles and equations are typically employed: - Reynolds number (Re) calculation -
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