Thermal Science lab Manual 15 3 13

Topics: Heat, Heat transfer, Temperature, Thermodynamics / Pages: 56 (6205 words) / Published: Mar 12th, 2015
AUTOMOTIVE
ENGINEERING
LAB 1
(MEC 2610)

LABORATORY
MANUAL

SEPTEMBER 2011
MEC 2610

1

Table of Contents
Software Module
1. Excel
2. Matlab

Thermal Science Module
Experiment 1: Thermal and Electrical Conductivity of Metals.
Experiment 2: Heat Pump.
Experiment 3: Heat Insulation/ Heat Conduction.
Experiment 4: Stirling Engine.
Experiment 5: Solar Ray Collector.

Metallographic Module

Experiment 1: Study and Operation of the Metallurgical/Optical Microscope and study of the Microstructures of Standard Samples.
Experiment 2: Study and Operation of Scanning Electron Microscope [SEM] and study of the Microstructures of Standard Samples.
Experiment 3: Heat Treatment and Hardenability Test of Carbon Steels and the Effects on Their Mechanical Properties.
Experiment 4: Jominy End Quench Test.

MEC 2610

2

Software Module
1. Excel
2. Matlab

MEC 2610

3

Thermal Science Module

Experiment 1: Thermal and Electrical Conductivity of Metals.
Experiment 2: Heat Pump.
Experiment 3: Heat Insulation/ Heat Conduction.
Experiment 4: Stirling Engine.
Experiment 5: Solar Ray Collector.

MEC 2610

4

Experiment 1 – Thermal and Electrical Conductivity of Metals

1. BACKGROUND
If a temperature difference exists between different locations of a body, heat conduction occurs. In this experiment there is a one-dimensional temperature gradient along a rod. The quantity of heat dQ transported with time dt is a function of the cross-sectional area a and the temperature gradient dT/dx perpendicular to the surface.

(1) λ is the heat conductivity of the substance.
The temperature distribution in a body is generally a function of location and time and is in accordance with the Boltzmann transport equation

(2)
Where r is the density and c is the specific heat capacity of the substance.
After a time, a steady state
(3)

is achieved if the two ends of the metal rod having a length l are maintained at constant temperatures T1 and T2, respectively, by two heat reservoirs.
Substituting equation

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