1. Laws of Thermodynamics and Engine Technology
B3.1 and B3.2

2. Laws of Thermodynamics
Thermodynamics is the study of the interrelationships between heat, work and energy.
THE LAWS OF THERMODYNAMICS STATE…
The total energy, including heat, in a system and it’s surroundings remains constant
Types of systems include: open (exchange both matter and energy), closed (exchange energy ONLY) and isolated systems (exchanges neither).
The total energy in a system can be increased by adding heat to a system from the surroundings or by increasing the amount of work done on a system. (Positive Work)
Negative work results when the total energy in a system decreases or the amount of work done in a system decreases

3. Laws of Thermodynamics
2. Heat flows from warmer objects to cooler objects, resulting in some heat being converted into mechanical energy to do work
As a result, perpetual motion or perfect machines are not possible since some input energy is ALWAYS converted to heat
You can never have 100% efficiency… you can never get out of a machine as much as you put in.

4. Heat Engines and Heat Pumps
A heat engine is a device which converts heat into mechanical energy
Examples: Thermo-electric converter, jet engine
Heat Pumps
A heat pump is a device which uses mechanical energy to transfer heat
Examples: Refrigerator pump, air conditioner
10 0C
90 0C

5. Homework
Read pages
B3.1 Check and Reflect
page 205 #’s 1-10

6. 3.2
Engine Technology

7. Engine Timeline Developing Technology
If we look at the technology we have today, we know that we take it all for granted; cars, planes, computers, ipods, cell phones etc. How long has it taken to develop the various technologies used personally, professionally or even the military?

8. Your Task!
This section is focusing on Internal combustion engines. We are going to look at the various developments in engine technology over the years.
Use your textbook to fill in the following information on the development of these engines. Remember to keep your answers summative (don’t copy directly from the text).

9. Complete the section in your notes B3.2 Check and Reflect
Read section B3.2 pages
Complete the section in your notes
B3.2 Check and Reflect
Page 214 #’s 1-8