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We’ve Been Testing Water Pumps For Years – Has Their Efficiency Changed?

This paper presents selected results from the analysis of over 28,000 pump tests performed by Southern California Edison between 1990 and 1997 through its Hydraulic Services Program. Begun in 1911, the “Pump Test” program is believed to be one of the nation’s oldest continuously operating industrial and agricultural energy efficiency programs. It currently provides energy efficiency information and 4,000 5,000 free pump tests per year to over 650 agricultural and municipal water pump end users, reaching 52% of all energy consumed in the sector. This analysis was conducted as part of a comprehensive “market effects study” which developed and tested a set of hypotheses on how the program may have affected a wide-range of market barriers to the adoption of cost-effective energy efficient water pumping equipment and services. The study was designed with assistance of the California Demand-side Management Advisory Committee (CADMAC), and was one of four such studies extensively reviewed by consultants to the California Board for Energy Efficiency in the context of market transformation. Introduction This paper reports on our analysis of the immensely rich database of pump test results spanning seven years of data collection by Southern California Edison pump test technicians. This analysis was only one facet of a much broader study that investigated the market effects associated with Southern California Edison’s Hydraulic Services Program. Readers interested in the methodological issues raised by the project and our other findings are encouraged to seek out other published sources on the study (Peters, et al. 1998a; Peters, et al. 1998b; Peters, et al. 1998c; Conlon, Weisbrod, and Samiullah 1999). According to our review of the literature and discussions with leading pumping experts, we believe that no larger data set of pump testing results has previously been published. Background Southern California Edison’s Hydraulic Services (Pump Test) Program is one of the largest and longest running pump-related energy efficiency programs in the country. The program provides municipalities, agricultural, and other water pumping customers with a pump 1 This paper reports on work completed while Mr. Conlon was a Senior Consultant at RLW Analytics. 2 We designed the project to closely follow the paradigm developed in the Market Transformation Scoping Study (Eto, Prahl, & Schlegel, 1996).