Heat Transfer
 
 
Subject Code: EME4016
Aim of Subject: To introduce the students to the basics of heat transfer and the solution to thermal problems.
Learning Outcome of Subject: At the completion of the subject, students should be able to :
  • Construct Mohr's circle based on the current state of stresses/strains of a material and predict the magnitude of stresses/strains at different orientation from the same Mohr¡¯s circle.
  • Construct a network system analogous to the electrical circuit to simplify the steady state heat transfer problem and solve it accordingly.
  • Solve transient conductive heat transfer problems using different models and available charts.
  • Identify the differences between forced and free convection heat transfer.
  • Determine the convection heat transfer coefficients by means of dimensionless parameters, e.g., Nusselt, Reynolds, Prandtl, etc.
  • Recognize blackbody, nonblackbody and gray body radiations.
  • Calculate the radiation shape factor and net heat transfer between radiating bodies.
  • Apply effectiveness-NTU and LMTD method to assist the design of various heat exchangers.
  • Evaluate the cooling process of a system in term of its fin efficiency.
  • Conduct, under supervision, laboratory experiments to measure the conductivity of various materials and the convection heat transfer coefficient of a tubular heat transfer problem.
Programme Outcomes:
  • Ability to acquire and apply fundamental principles of science and engineering(60%)
  • Capability to communicate effectively(10%)
  • Acquisition of technical competence in specialised areas of engineering discipline(10%)
  • Ability to identify, formulate and model problems and find engineering solutions based on a systems approach(10%)
  • Ability to work independently as well as with others in a team(10%)
Assessment Scheme:
  • Lab Experiments - work in groups, lab report writing, oral assessment at the end of lab (10%)
  • Tutorial / Assignment - group assignment,focus group discussion at tutorial,to enhance understanding of basic concepts in lecture(15%)
  • Test Quiz - written exam (15%)
  • Final Exam - written exam (60%)
Teaching and Learning Activities: 51 hours (lectures,tutorials and laboratory experiment)
Credit Hours: 3
Pre-Requisite: EME3026: Fluid Dynamics
References:
  • J.P. Holman, "Heat Transfer", 9th Edition, McGraw-Hill, 2002.
  • V.S. Arpaci, S.H. Kao and A. Selamet, “Introduction to Heat Transfer”, Prentice-Hall, 2000
  • F.P. Incropera and D.P. DeWitt, “Fundamentals of Heat and Mass Transfer”, 4th Edition, John Wiley & Sons, 1996

Subject Contents

  • Modes of Heat Transfer

    • Fourier's law. Newton's law. Stefan-Boltzmann law.
     
  • Conduction

    • Steady one-dimensional heat flow through composite sections. Insulation. One-dimensional conduction with heat source. Two-dimensional conduction. Lumped heat capacity model for transient heat transfer.
     
  • Convection

    • Energy equation in flow systems. Flow over external surfaces. Application of laminar and turbulent boundary layer theory. Flow in pipes. Free convective heat transfer.
     
  • Radiation

    • Black body and gray body. Kirchoff's identity. Emmisivity. Shape factors. Radiosity and irradiation. Diffused and specula surfaces. Network analysis. Gas radiation.
     
  • Combined Modes of Heat Transfer

    • Heat flow through a cooling fin. Fin efficiency. Heat exchanger.
     

Laboratory

1. Thermal Conduction
2. Tubular Forced Convection Heat Transfer