Optimal metering plan of measurement and verification for energy efficiency lighting projects

The optimal metering plan that guarantees the expected measurement accuracy with the minimal metering cost is always of great interest to measurement and verification (M&V) project developers. In this paper, a metering cost minimisation model is built for the metering design of a specific M&V EE lighting project. The optimisation problem is solved and the sample sizes of each group are determined. In addition, the minimal metering cost of the sampling is decided to achieve the desired measurement accuracy of the overall project. The proposed metering cost minimisation model proves to be useful in the metering design for the M&V projects. In addition, as time goes by, the population size of each group may change. If the changes of the population size in the groups are predictable, a long-term optimal metering plan can be designed at the beginning of an M&V project by the generalised metering cost minimisation model.