Misunderstandings over energy efficiency study of high temperature water chillers

Analyses some misunderstandings existed in relevant literatures about energy efficiency evaluation and comparison of normal and high temperature water chillers in higher chilled water temperature operating mode. Proposes that thermodynamic perfectness should be used to compare energy efficiency of the two kinds of chillers in the same temperature operating mode. Points out that the energy efficiency of the high temperature centrifugal chiller developed in a relevant literature is not higher than that of normal one.