Sulphur Dioxide Refrigerants

Sulphur dioxide (SO2) is a colourless gas or liquid. It is toxic, with a very sharp smell. When sulfur burns in air, sulfur dioxide is formed. When sulfur dioxide combines with water it produces sulphuric and sulphuric acids. These acids are very corrosion of metal. They have a negative impact on most materials. Sulfur dioxide is not considered safe refrigerant. Sulfur dioxide is not considered safe when used in large quantities. As a refrigerant, sulphur dioxide works in a vacuum, to give the desired temperature. Moisture in the air will be involved in the system when a leak occurs. This means, metal parts, ultimately corrosion, causing compressor grab.

Sulphur dioxide (SO2) boils at 14F (10C) and has a heat of vaporization at boiling point (1 ATM) 172.3 Btu/lb. It has the latent heat of combustion 166 Btu/lb.

To produce the same amount of refrigeration, sulphur dioxide requires about one-third more steam than CFCs and methyl chloride. This means that the condensing unit is operating at high speed or compressor cylinders must be larger. Starting with sulphur dioxide does not mix well with butter suction line should be stable slope machine. Otherwise, oil traps, gripping the suction line. This refrigerant is not suitable for use in some places.

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