The Benefits of variable speed drives of high-load chiller operations

This paper demonstrates the extent to which variable speed drives (VSDs) reduce the energy consumption of chillers compared to constant speed drives (CSDs), even in applications where chillers are running continuously at high loads – for example, data centers, factories that require process cooling for equipment, and district cooling facilities. This paper also shows a system designer how to optimize the efficiency of chilled water systems using VSDs It supplies the metrics that support each claim and provides recommendations on how to evaluate the impact of off design operation.


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