K-2
K-2
Air Conditioner
7
W701-0160E
3.3 Refrigerant
1. The substance that circulates through the
refrigeration cycle, and functions to transmit heat,
is known as the refrigerant. In our air conditioning
system, HFC134a is used. It is a freon-based
refrigerant, but does not contain chlorine.
2. As shown in the figure below, the refrigerant
HFC134a remains in liquid form at relatively high
temperatures when it is strongly compressed.
However, at low pressures it vaporizes at
temperatures as low as 0°C (32°F) or
-10°C (14°F).
3. This means, for example, that if the refrigerant
vaporizes at 0°C (32°F), then the evaporator is
also at 0°C (32°F). The air that passes through
this evaporator should be cooled.
4. If the pressure is reduced so that the refrigerant
evaporates at -5°C (23°F), the evaporator is also
maintained at -5°C (23°F). This results in the
formation of frost, which inhibits the flow of air
through the evaporator and prevents cooling.
5. The vaporized refrigerant must then be liquefied.
However, it is impossible to obtain a temperature
as low as 40°C (104°F) in a hot summer
environment.
6. If 60
°
C (140°F) is possible, HFC134a will become
a liquid at 60°C (140°F) if the pressure is
approximately 1.7 MPa (246.5 psi) or above.
When the gaseous refrigerant is compressed to
1.7 MPa (246.5 psi) (by the compressor), the gas
temperature rises to approximately 80°C (176°F).
7. Therefore, the temperature of the gas as it enters
the condenser is 80°C (176°F). The curve above
shows that when the refrigerant gas is cooled by
20°C (68°F), it becomes a liquid at approximately
60°C (140°F) by the time it reaches the condenser
outlet.
Содержание TT-800XXL1
Страница 20: ...B 2 B 2 Hydraulic Pump 3 W101 0280E 1 2 Inside view Variable displacement piston pump...
Страница 25: ...8 W101 0280E B 2 B 2 Hydraulic Pump 1 Joint control piston 2 Hanger 3 Metal 4 Orifice Hanger section 6 7...
Страница 114: ...5 G 2 G 2 Boom Five Section Boom 5 W536 0760E G 2...
Страница 166: ...13 13 W701 0160E K 2 K 2 Air Conditioner K 2 4 Layout 4 1 Overall layout...
Страница 167: ...14 14 W701 0160E K 2 K 2 Air Conditioner K 2 4 2 Overall layout...
Страница 168: ...15 15 W701 0160E K 2 K 2 Air Conditioner K 2 4 3 Evaporator section...
Страница 169: ...16 W701 0160E K 2 K 2 Air Conditioner 5 Compressor ass y...
Страница 170: ...17 17 W701 0160E K 2 K 2 Air Conditioner K 2 6 Evaporator ass y...
Страница 171: ...18 18 W701 0160E K 2 K 2 Air Conditioner K 2 7 Condenser ass y...
Страница 172: ...19 19 W701 0160E K 2 K 2 Air Conditioner K 2 8 Electric 8 1 Electric circuit 0 363 205 60030...
Страница 173: ...20 20 W701 0160E K 2 K 2 Air Conditioner K 2 8 2 Main harness A...
Страница 174: ...21 21 W701 0160E K 2 K 2 Air Conditioner K 2 8 3 Main harness B...
Страница 227: ...Hydraulic Pressure Setting Table 1 WY02 0320E 1 Y 1 Y 1 Y 1 Hydraulic Pressure Setting Table 1 345 801 01500...
Страница 254: ...Location of Hydraulic Parts 4 WZ07 0780E 4 Z 4 Z 4 Z 4 Location of Hydraulic Parts...
Страница 259: ...Hydraulic Electric Carrier Equipment Comparison Table Z 8 Z 8 Z 8 9 WZ09 0130E 9...
Страница 262: ...Z 11 Z 11 Harness Swing Table Right Z 11 11 WZ04 1300E 11 Harness Swing Table Right 5 343 530 32010...
Страница 263: ...Z 12 Z 12 Harness Boom Z 12 12 WZ04 1310E 12 Harness Boom 1 2 2 343 530 32040 1 343 530 22030...
Страница 265: ...14 WZ04 1320E 14 Z 14 Z 14 Harness Lower Z 14 Harness Lower Applicable serial No 475334 1 1 336 500 30021...
Страница 266: ...Z 15 Z 15 Harness Outrigger Operation Option Z 15 15 WZ04 1330E 15 Harness Outrigger Operation Option 0 333 316 60020...