Mechanical Engineering Exam  >  Mechanical Engineering Notes  >  Heat Transfer  >  Problems: Convective Heat Transfer: One Dimensional

Problems: Convective Heat Transfer: One Dimensional | Heat Transfer - Mechanical Engineering PDF Download

Problems : Module 3 - Convective Heat transfer: One dimensional, Heat Transfer

 

Frequently Asked Questions and Problems for Practice (Module 3)

Q.1What is convection and how is it different than conduction?
Q.2

What is heat transfer coefficient? Explain its physical significance.

Q.3What is film thickness? What is its relevance in the heat transfer operations?
Q.4Out of Ui and Uo, which one is larger in magnitude and why?
Q.5What is the concept of controlling resistance?
Q.6What is critical insulation thickness? Comment on the critical insulation thickness of a plane wall.
Q.7

The temperature profile of a solid sphere is  at steady state condition, the temperature Tis in oC and r is in meter. The thermal conductivity of the sphere is 15 W/m oC. The solid sphere is put in the atmosphere condition at 30 oC. Calculate the rate of heat transfer and evaluate the maximum temperature in the sphere?

Q.8

Steam at 170 oC is flowing in a 10 cm diameter pipe. In order to reduce the heat loss to the environment (at 30 oC) the pipe is planned to be insulated with 10 cm thick insulator. The various data is given under

kinsulatorProblems: Convective Heat Transfer: One Dimensional | Heat Transfer - Mechanical Engineering (T in oC)
h for outside air (over insulator)6 W/m2 oC
h for outside air (on bare pipe at 160 oC , if no insulator)25 W/m2 oC
Cost of insulationRs. 16000/m3
Steam costRs. 750/ton
Latent heat of steam1820 kJ/kg

Estimate the pay-back period assuming a rate of interest of 0.18/yr.

 

The document Problems: Convective Heat Transfer: One Dimensional | Heat Transfer - Mechanical Engineering is a part of the Mechanical Engineering Course Heat Transfer.
All you need of Mechanical Engineering at this link: Mechanical Engineering
57 videos|77 docs|86 tests

Top Courses for Mechanical Engineering

FAQs on Problems: Convective Heat Transfer: One Dimensional - Heat Transfer - Mechanical Engineering

1. What is convective heat transfer in one-dimensional chemical engineering?
Ans. Convective heat transfer in one-dimensional chemical engineering refers to the transfer of heat between a solid surface and a fluid medium, such as a gas or liquid, in a single direction. It involves the conduction of heat through the solid surface and the convection of heat through the fluid medium.
2. How is convective heat transfer affected by the properties of the fluid?
Ans. The convective heat transfer is affected by the properties of the fluid, such as its viscosity, thermal conductivity, and specific heat capacity. These properties determine the ability of the fluid to conduct heat and the rate at which heat is transferred from the solid surface to the fluid.
3. What are the different modes of convective heat transfer?
Ans. The different modes of convective heat transfer include natural convection, forced convection, and mixed convection. Natural convection occurs due to the density differences caused by temperature variations in the fluid. Forced convection is driven by an external force, such as a pump or a fan. Mixed convection is a combination of natural and forced convection.
4. How can convective heat transfer be enhanced in chemical engineering applications?
Ans. Convective heat transfer can be enhanced in chemical engineering applications by increasing the surface area available for heat transfer, increasing the fluid velocity, or improving the thermal conductivity of the fluid. This can be achieved through the use of heat exchangers, fins, turbulence promoters, and high-performance fluids.
5. What are the limitations of one-dimensional convective heat transfer models in chemical engineering?
Ans. One-dimensional convective heat transfer models in chemical engineering have certain limitations. They assume uniform temperature distribution along the surface and do not account for three-dimensional effects. Additionally, they may not accurately predict heat transfer in complex geometries or situations where the fluid flow is not well-defined.
57 videos|77 docs|86 tests
Download as PDF
Explore Courses for Mechanical Engineering exam

Top Courses for Mechanical Engineering

Signup for Free!
Signup to see your scores go up within 7 days! Learn & Practice with 1000+ FREE Notes, Videos & Tests.
10M+ students study on EduRev
Related Searches

Problems: Convective Heat Transfer: One Dimensional | Heat Transfer - Mechanical Engineering

,

pdf

,

MCQs

,

mock tests for examination

,

Problems: Convective Heat Transfer: One Dimensional | Heat Transfer - Mechanical Engineering

,

practice quizzes

,

Sample Paper

,

Problems: Convective Heat Transfer: One Dimensional | Heat Transfer - Mechanical Engineering

,

Important questions

,

Extra Questions

,

Summary

,

past year papers

,

video lectures

,

study material

,

Exam

,

Semester Notes

,

Viva Questions

,

Objective type Questions

,

Free

,

Previous Year Questions with Solutions

,

shortcuts and tricks

,

ppt

;