24 June 2014
The need for energy optimization of heat pump and air conditioning systems is large. This paper describes the concept of System Efficiency Index (SEI) and presents the benefits of
using it instead of COP for performance optimization of installed systems. The use of SEI enables a comparison between the values from dimensioning of a plant and an actual
operation in a plant. The SEI can indicate when the system performance is not optimal even though the COP value is high. The results from the two systems analyzed in this paper, show
both the stable SEI expected for a well performing system, and a SEI that indicates a less efficient Component.