May 2004

Heat Transfer

Debottlenecking package refrigeration units

Consider these options to increase capacity

Use of package refrigeration units is very common in chemical process plants. During detail engineering, the conventional approach of engineering firms is to fix the refrigeration loads and temperature levels. Actual unit design is left to the refrigeration unit supplier. These units are generally designed with minimum overdesign. Thus, they can become limiting when the main plant load is increased beyond design capacity. Apart from that, since most of these units use cooling water as the cooling medium for the condenser, seasonal variations in cooling water supply temperature affect unit performance and these units can become a bottleneck in summer conditions in countries where season

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