Advancements in Screw Compressor Oil Cooling Systems
Advancements in Screw Compressor Oil Cooling Systems (1983)-Depending on the size of the unit and the operating conditions, the oil cooling load can range from 5 to 30% of the total heat rejection to the refrigeration condenser. Because of the large quantities of heat, it is of the utmost importance that this heat be dissipated in an efficient manner. Over the years, several different methods have been used to remove the heat absorbed by the oil. These systems include water/glycol to oil shell and tube heat exchangers, liquid refrigerant to oil shell and tube heat exchangers, and liquid injection systems. Initially, screw compressor units employed water cooled oil cooling using a water to oil heat exchanger. The most serious disadvantages of these system is the resultant fouling and corrosion of the water side heat transfer surface and the relatively high initial equipment cost. Today, with the increasing scarcity of water, its corrosive properties, and fouling characteristics, water cooled oil cooling has largely given way to oil cooling systems utilizing system refrigerant.
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