Why are oil coolers necessary for screw compressors?

Oil coolers are essential for screw compressors primarily because screw compressor oil absorbs a significant amount of heat during the compression process. As the refrigerant is compressed, the temperature rises due to the thermodynamic principles involved; the oil circulating through the compressor plays a crucial role in managing this heat.

By absorbing heat from the refrigerant, the oil can help maintain optimal operating temperatures within the compressor system. Overheating can lead to decreased efficiency, potential damage to the compressor, and failure of the lubrication system. The oil cooler dissipates the heat absorbed by the oil, enabling it to continue to effectively lubricate and protect the compressor components, thus ensuring reliable operation and longevity of the equipment.

The other choices may touch on aspects of compressor operation, but they do not directly explain the fundamental role that oil coolers play in managing heat transfer in screw compressors.