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...

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...

In many cases, buildings lack automatic ventilation feedback and are consequently over-ventilated. This report investigates the potential energy savings for a demand control ventilation (DCV) system with centralized air quality sensors. This technology aims to maintain or improve building comfort,...

This review investigates the demand response (DR) and control capability of a Home Area Network (HAN) technology with Smart Appliances. Secondly, it discusses energy savings potential, ease of installation, and user feedback on the technology. This review describes in detail the technology and...

This study investigates the demand response (DR) capability and potential of a controller which can lower the speed of variable speed pool pumps. The vast majority of incumbent pool pumps are single speed and can only be turned off for DR measures. Variable speed pool pumps have the ability to...

A side-by-side comparison was done with the conventional technology, MH HID, and the emerging technologies, LED and induction. Based upon pump island occupancy, the bi-level light sources would allow for the under-canopy lights to be further dimmed to a light level acceptable to the station’s...

This project partnered with ACE Hardware’s Distribution Center located in Rocklin, CA and tested the integration of High Bay Light Emitting Diode (LED) lighting fixtures with integrated sensors and an aggressive Advanced Lighting Control System (ALCS) to realize the deepest energy savings possible...