Project Summary Retrofit by adding VFD controller to fractional horsepower Hot Water Recirculator in single loop domestic use for apartments and hotels, etc. can save gas 15.6% with a compensating but modest increase in hot water usage of 13.4%; or an average gas savings of about 27 therms per...

HGW Architects is the first commercial ZNE building in San Diego. SDG&E ET collaborated with Savings by Design to make this happen. ET then conducted a comprehensive study to understand modeled vs. actual building performance. The analysis discusses data discrepancies and methods used to...

Lab testing was conducted to evaluate the efficiency at various loads for PMAC motors at the 3 and 5 HP sizes compared with Premium Efficiency Induction Motor (PEIM) technology. Lab testing found efficiency increases to be between 2% and 24% for the 3 HP motor and 4% to 24% for the 5 HP motor,...

The primary goal for this project was to characterize energy efficiency of the Munters EPX 5000 in all modes of operation, in all possible configurations, and across a full range of operating conditions. Laboratory test results were carefully analyzed to consider the technical opportunities and...

The objective of this project was to validate energy savings associated with forced circulation pump driven technology and characterize the energy performance of thermosiphon and forced circulation engine generator block heater technologies under a field testing effort. Analysis of the field...

This is a revision to the previously submitted report that adjusts findings to provide more relevance for a broader market. (3/30/2015) A field evaluation was conducted of a submersion cooling system installed in an existing data center. Heat was generated by load banks and servers running...

The project was initiated to test emerging evaluation approaches to identify operational and technical opportunities to optimize energy and water usage of pressurized irrigation systems. The combined evaluation incorporates information derived from a "standard" pump efficiency test and a "standard"...

This project tested performance characteristics of pressure regulating valves and pressure compensating emitters from a variety of manufacturers. In addition to the research, the Consultant coordinated the implementation of these low-pressure components on a commercial agriculture operation and...

This study investigates the energy savings capability and potential of ultra-low temperature freezer monitoring systems when used as an energy consumption diagnostic tool. Ultra-low temperature (ULT) freezers are common in university labs and facilities involved in research and development...

Four different retrofit RTU controllers were tested on four 7.5 ton heat pumps serving office space at one building in San Diego. The operation of those units was alternated on a weekly basis from baseline to retrofit mode. Proper operation of the each controller was verified and the features of...