Transformer DOE Standards Evaluation
The U.S. Department of Energy (DoE) has proposed mandatory efficiency standards for a wide range of consumer and industrial “appliances”. The proposed standards will require a very substantial increase in efficiency relative to the average distribution transformer produced today. The DoE is acting under the authority of the Energy Policy and Conservation Act, in which Congress mandates DoE to establish minimum efficiency standards for distribution transformer efficiency. It should be noted that the law requires DoE to establish standards which are “…technologically feasible and economically justified and would result in significant energy savings…”. To support development of efficiency standards compliant with this mandate, DoE commissioned a very elaborate and complex analysis. This white paper reviews DoE’s analysis process, and the resulting efficiency standards. The standards are compared to conventional utility total owning cost evaluation (TOC) methodology.