Methyl Chloride
Methyl chloride (CHP) has a boiling point of-10.6 degrees Fahrenheit (-23.3 degrees). Its heat of vaporization at boiling point (at 1 ATM) - 177.8 BTU/lb. This is a good refrigerant. However, because it will burn in some cases, in some cities do not allow to use. Easily liquefy and has a relatively high latent heat of combustion. It does not cause corrosion of metal, when it is dry.
However, in the presence of moisture it damages the compressor. Sticky black sludge is formed when the excess of moisture in combination with a chemical. Methyl chloride is well mixed with oil. It will operate on a positive pressure is low as -10 degrees f (-23 degrees C). Vapors must be uncomfortable in the face of proportion to the following numbers:
- Carbon dioxide 100
- Methyl chloride 70
- Ammonia-2
- Sulphur dioxide-1
This means that methylene chloride 35 times safer than ammonia and 70 times safer than sulphur dioxide. Methyl chloride is difficult to detect with the nose or eyes. It is not irritating effect. Therefore some producers add 1% of the amount of acrolein, colorless liquid with a sharp smell, as a warning agent. It is obtained by the distillation of fats.
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Refrigerants