Yuchai YC4D60-D21 - Physical and Chemical Property of Glycol

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application of the new developed solutions was restricted. Nowadays, it is the glycol
based anti-freeze solutions that have been accepted widely.
Anti-freeze solution is made up of raw alcohol, water and additives. The alcohol is glycol
and the water is distilled water. The additives include antirust agents, anti-toxicity agents,
PH regulating agents (buffering agents), antifoam agents, and other performing
enhancing chemicals.
Table 1 Physical and chemical property of glycol
Density(20℃)
1.113 g/mL
Flash point
116℃
Freezing point
-13℃
Specific heat capacity(20℃)
2349J/(g·k)
Boiling point ( 760mmHg)
197℃
Vapor pressure ( 20℃)
8Pa
Vapor pressure ( 100℃)
2133Pa
Thermal conductivity ( 20℃)
2.889×0.004[W／(cm·s·℃)]
Table 2 The glycol concentration, density and freezing point
of the anti-freeze solution
Freezing
Point
(℃)
Glycol
Concentration
(%)
Density
(20℃)
Freezing
Point
(℃)
Glycol
Concentration
(%)
Density
(20℃)
-10
28.4
1.0340
-40
54
1.0713
-15
32.8
1.0426
-45
57
1.0746
-20
38.5
1.0506
-50
59
1.0786
-25
45.3
1.0586
-45
80
1.0958
-30
47.8
1.0627
-30
85
1.1001
-35
50
1.0671
-13
100
1.1130
The anti-freeze solution is classified to be the direct-use type and the concentrated type.
The concentrated type can not be used directly and must be diluted to a particular
concentration as stated in Table 2 according to the operating temperature.