The 10th anniversary, Hyundai World Rally Team's amazing journey
Ttk1 a let'stalkbasics
1. DAY 1 - HOUR 2DAY 1 - HOUR 2
-- LET'S TALK BASICS ---- LET'S TALK BASICS --
DAY 1 - HOUR 2DAY 1 - HOUR 2
-- LET'S TALK BASICS ---- LET'S TALK BASICS --
??*STOP ME WHEN AN HOUR IS UP***STOP ME WHEN AN HOUR IS UP**
2. WHY DO WE CALL ITWHY DO WE CALL IT
AIRAIR CONDITIONINGCONDITIONING??
WHY DO WE CALL ITWHY DO WE CALL IT
AIRAIR CONDITIONINGCONDITIONING??
(ARE YOU TAKING NOTES?)
THINGS TO
KNOW
AUT 22 - A/C
(1
ST TEST)
3. POLLENPOLLEN
WHAT ARE THE THREE THINGS THATWHAT ARE THE THREE THINGS THAT
AIRAIR CONDITIONINGCONDITIONING DOES TO AIR?DOES TO AIR?
A.A. COOLSCOOLS
B.B. DRIESDRIES
C.C. CLEANSCLEANS
AIR CONDITIONING
HEATHEAT
MOISTUREMOISTURE
DUSTDUST
4. IF YOU WET YOUR HANDIF YOU WET YOUR HAND
WHY DOES IT FEEL COOL?WHY DOES IT FEEL COOL?
LICK YOUR HAND!LICK YOUR HAND!
BLOW ON IT!BLOW ON IT!
WHAT DO YOU FEEL?WHAT DO YOU FEEL?
WHY?WHY?
5. WHAT ARE THE THREEWHAT ARE THE THREE
STATES OF MATTER?STATES OF MATTER?
WHAT ARE THE THREEWHAT ARE THE THREE
STATES OF MATTER?STATES OF MATTER?
SOLID LIQUID GAS
PRESSURE GOES DOWN
AS HEAT IS ABSORBED
AS PRESSURE GOES UP
AS HEAT IS LOST
6. WHAT IS ATMOSPHERIC PRESSURE?WHAT IS ATMOSPHERIC PRESSURE?
STANDARD PRESSURESTANDARD PRESSURE
HAS WHAT UNITS OFHAS WHAT UNITS OF
MEASURE?MEASURE?
0 PSI0 PSIGG
14.7 PSI14.7 PSIAA
ATMOSPHERIC
PRESSURE
7. P.S.I.P.S.I.GG.? OR P.S.I..? OR P.S.I.AA.?.?P.S.I.P.S.I.GG.? OR P.S.I..? OR P.S.I.AA.?.?
30
0
ATMOSPHERIC
PRESSURE
10
20
30 40
50
60
70
80
90
100
10
20
IN. HG.
PSI PSIA
0
10
20
30
60
90
40
50 70
80
100
110
8. ABSENTS OF ALL AIR PRESSURE.ABSENTS OF ALL AIR PRESSURE.
DO YOU KNOW HOW VACUUM ISDO YOU KNOW HOW VACUUM IS
MEASURED?MEASURED?
WHAT IS A VACUUM?WHAT IS A VACUUM?WHAT IS A VACUUM?WHAT IS A VACUUM?
9. IF A GLASS TUBE WAS FILLED
WITH MERCURY AND THEN
INVERTED IN A BOWL OF
MERCURY, WHAT WOULD BE
THE LIQUID LEVEL IN THE
TUBE?
(TOP?, MIDDLE?, BOTTOM?TOP?, MIDDLE?, BOTTOM?)
MERCURY
(HG)
36”
DO YOU KNOW HOW VACUUM IS MEASURED?
WHAT IS A VACUUM?WHAT IS A VACUUM?WHAT IS A VACUUM?WHAT IS A VACUUM?
11. What is the atmospheric pressure atWhat is the atmospheric pressure at
sea level?sea level?
a.a. 29.98 psig29.98 psig
b.b. 14.7 psia14.7 psia
c.c. 20 psi20 psi
d.d. none of the above are correctnone of the above are correct
12. MERCURY
(HG)
THE MERCURY WILL HANG AT 29.91”THE MERCURY WILL HANG AT 29.91”
HOW IS THIS TRANSFERRED TO AHOW IS THIS TRANSFERRED TO A
29.91 IN.
AT ATMOSPHERIC
PRESSURE
WHAT IS A VACUUM?WHAT IS A VACUUM?WHAT IS A VACUUM?WHAT IS A VACUUM?
13. ARE WE GOING TO CARRY AARE WE GOING TO CARRY A
BUCKET OF MERCURY AND A GLASSBUCKET OF MERCURY AND A GLASS
TUBE AROUND IN THE SHOP?TUBE AROUND IN THE SHOP?
HAVE THE INSTRUCTOR SHOW YOU HOW AHAVE THE INSTRUCTOR SHOW YOU HOW A
GAUGE IS MADEGAUGE IS MADE
14. AT WHAT TEMPERATUREAT WHAT TEMPERATURE
DOES WATER BOIL?DOES WATER BOIL?
AT WHAT TEMPERATUREAT WHAT TEMPERATURE
DOES WATER BOIL?DOES WATER BOIL?
< 212212oo
FF
15. AT WHAT TEMPERATURE DOESAT WHAT TEMPERATURE DOES
STEAM CONDENSE TO A LIQUID?STEAM CONDENSE TO A LIQUID?
AT WHAT TEMPERATURE DOESAT WHAT TEMPERATURE DOES
STEAM CONDENSE TO A LIQUID?STEAM CONDENSE TO A LIQUID?
LIQUID
GAS< 212212oo
FF
16. WHAT WOULD HAPPEN TO THISWHAT WOULD HAPPEN TO THIS
TEMPERATURE IF WE REDUCED THETEMPERATURE IF WE REDUCED THE
ATMOSPHERIC PRESSURE?ATMOSPHERIC PRESSURE?
PIKE'S PEAK
3 MILES )
8.6 PSI
DENVER
(5000 FT.)
13.0 PSI
ST. LOUIS
(600 FT.)
14.4 PSI
NEW YORK
(SEA LEVEL)
14.7 PSI
IT WOULD GO DOWN!IT WOULD GO DOWN!
17. WHAT WOULD WE HAVE TO DO TOWHAT WOULD WE HAVE TO DO TO
ATMOSPHERIC PRESSURE TO GETATMOSPHERIC PRESSURE TO GET
WATER TO BOIL IN THIS ROOM?WATER TO BOIL IN THIS ROOM?
WHAT WOULD WE HAVE TO DO TOWHAT WOULD WE HAVE TO DO TO
ATMOSPHERIC PRESSURE TO GETATMOSPHERIC PRESSURE TO GET
WATER TO BOIL IN THIS ROOM?WATER TO BOIL IN THIS ROOM?
LOWER THE PRESSURELOWER THE PRESSURE
18. System Vacuum
Inches Mercury
Temperature °F
Boiling Point
24.04 140
25.39 130
26.45 120
27.32 110
27.99 100
28.50 90
28.89 80
29.18 70
29.40 60
29.66 50
29.71 40
29.76 30
29.82 20
29.86 10
29.87 5
29.88 0
29.90 –10
29.91 –20
BOILING POINT OF
WATER UNDER A
VACUUM
DO YOUDO YOU
UNDERSTANDUNDERSTAND
THIS CHART?THIS CHART?
SUBTRACT 1”SUBTRACT 1”
FOR EVERY 1000FOR EVERY 1000
FT. OFFT. OF
ELEVATION.ELEVATION.
(see next slide)(see next slide) Text pg. 68 fig 10-4
19. WHY DO WE SUBTRACT APPROXIMATELYWHY DO WE SUBTRACT APPROXIMATELY
1 INCH OF VACUUM FOR EVERY 1000 FT.1 INCH OF VACUUM FOR EVERY 1000 FT.
OF ELEVATION?OF ELEVATION?
WHY DO WE SUBTRACT APPROXIMATELYWHY DO WE SUBTRACT APPROXIMATELY
1 INCH OF VACUUM FOR EVERY 1000 FT.1 INCH OF VACUUM FOR EVERY 1000 FT.
OF ELEVATION?OF ELEVATION?
What does altitudeWhat does altitude
do to atmosphericdo to atmospheric
pressure?pressure?MERCURY (HG)
? IN.
PSI?
21. HOW WOULD YOU REMOVE WATERHOW WOULD YOU REMOVE WATER
FROM AN AIR CONDITIONING SYSTEMFROM AN AIR CONDITIONING SYSTEM
BEFORE RECHARGING IT?BEFORE RECHARGING IT?
HOW WOULD YOU REMOVE WATERHOW WOULD YOU REMOVE WATER
FROM AN AIR CONDITIONING SYSTEMFROM AN AIR CONDITIONING SYSTEM
BEFORE RECHARGING IT?BEFORE RECHARGING IT?
?
23. THE THREE STATES OF MATTERTHE THREE STATES OF MATTER
SOLIDSOLID
LIQUIDLIQUID
GASGAS
24. WHAT IS THE FREEZINGWHAT IS THE FREEZING
POINT OF WATER?POINT OF WATER?
F
? =3232oo
FF
25. COMPARE THESE SCALESCOMPARE THESE SCALES
100100 oo
BOILING POINT OF WATER 212BOILING POINT OF WATER 212 oo
0° FREEZING POINT OF WATER 320° FREEZING POINT OF WATER 32 oo
CELSIUS FAHRENHEIT
26. WHAT IS COLD?WHAT IS COLD?
( -273.16( -273.16oo
C = -459.67C = -459.67oo
F = ABSOLUTELY NO HEAT)F = ABSOLUTELY NO HEAT)
CELSIUS FAHRENHEIT
100o
0o
-273o
-460o
32o
212oBOILING POINT OFBOILING POINT OF
WATERWATER
FREEZING POINT OFFREEZING POINT OF
WATERWATER
ABSOLUTE ZEROABSOLUTE ZERO
0o
27. 212o
- 32o
180o
Co
Fo
100o
- WATER BOILS - - - 212o
0o
- WATER FREEZES - 32o
5100
180
=
9
C
o
F
o
=
CAN YOU DETERMINE THE FORMULA TO
CONVERT Co
TO Fo
?
CAN YOU CONVERT CCAN YOU CONVERT Coo
TO FTO Foo
CCoo
= 5/9 (F= 5/9 (Foo
-32-32oo
))
FFoo
= 9/5C= 9/5Coo
+ 32+ 32oo
28. SO IN ACTUAL PRACTICESO IN ACTUAL PRACTICE
WHAT IS USUALLY DONE TOWHAT IS USUALLY DONE TO
CONVERT?CONVERT?
WE USE A CHARTWE USE A CHART
29. WHAT IS LATENT HEAT OF VAPORIZATION?WHAT IS LATENT HEAT OF VAPORIZATION?
(EVAPORATION)(EVAPORATION)
LATENT HEAT OF
VAPORIZATION
WATER (H O)2
212°F (100°C)
LATENT
HEAT OF
FUSION
32°F (O°C)
SUPER
HEAT
LATENTHEAT
A B C D
144 BTU
(36.288 kg-cal)
180 BTU
(45.36 kg-cal)
970 BTU
(244.44 kg-cal)
A. Solid, or Ice at 32°F (0°C)
C. Liquid, or Water at 212°F (100°C)
B. Liquid, or Water at 32°F (0°C)
D. Steam, or Vapor at 212°F (100°C)
pg. 26
WATER IS COLLECTING HEAT
HERE BUT ITS TEMPERATURE
IS NOT RISING
TEMP.
RISING
30. WHAT IS HUMIDITY?WHAT IS HUMIDITY?
The percentage ofThe percentage of
moisture in themoisture in the
airair
32. WHAT IS HUMIDITY?WHAT IS HUMIDITY?WHAT IS HUMIDITY?WHAT IS HUMIDITY?
100% HUMIDITY IS THE MAXIMUM AMOUNT100% HUMIDITY IS THE MAXIMUM AMOUNT
OF MOISTURE THAT AIR CAN HOLD AT AOF MOISTURE THAT AIR CAN HOLD AT A
GIVEN TEMPERATURE AND PRESSURE.GIVEN TEMPERATURE AND PRESSURE.
MORE MOISTURE WILL FALL OUT OF THE AIR.MORE MOISTURE WILL FALL OUT OF THE AIR.
39. LIST THE DIFFERENT WAYSLIST THE DIFFERENT WAYS
REFRIGERANT IS STORED AND SOLD.REFRIGERANT IS STORED AND SOLD.
LIST THE DIFFERENT WAYSLIST THE DIFFERENT WAYS
REFRIGERANT IS STORED AND SOLD.REFRIGERANT IS STORED AND SOLD.
45. 0 degrees Celsius is the same as:0 degrees Celsius is the same as:
a.a. 0 degrees Fahrenheit0 degrees Fahrenheit
b.b. 32 degrees Fahrenheit32 degrees Fahrenheit
c.c. 212 degrees Fahrenheit212 degrees Fahrenheit
d.d. 100 degrees Fahrenheit100 degrees Fahrenheit
e.e. none of the above arenone of the above are
correctcorrect
