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Project Info COMPLETE Project Title

Food Simulating Sensor Medium : Emerging Technology Application in Commercial Refrigeration

Project Number ET19SDG1041 Organization SDG&E End-use Other Sector Commercial Project Year(s) 2019 - 2021

The emerging technology is a National Sanitation Foundation (NSF) certified food product simulating sensor medium that changes the existing ‘air-temp’ thermostat into a ‘food-temp’ thermostat in a refrigeration unit. By enclosing the existing temperature sensor in a proprietary medium, the technology simulates the thermal characteristics of the product instead of the air surrounding the food product being refrigerated.

This study found that there was a 7% decrease in starts per day; an average of 19.4 starts per day were logged in the baseline period, compared to an average of 18.1 starts per day logged in the post-retrofit period.

More importantly there was a 14% reduction in duty cycle of the compressor which led to energy savings. In the baseline (2019-2020) the compressor consumed a total of 1,827 kWh over the approximately 36.6 day (878.75 hour) period. Over the same 36.6 day period in 2020-2021 (post-retrofit) the same compressor consumed 1,568 kWh which was a 14% reduction compared to the baseline.

It is important to note that while the post-retrofit measurements were conducted during the COVID-19 pandemic, the operations at Petco Park were gearing up for fans in the stadium starting in April 2021 and there was the usual level of activity. A low use period of the year (December to January) was deliberately selected for both the Baseline and Post-Retrofit measurements to provide a like-for-like comparison of low-season to low-season. Comparing high-season to high-season was not possible due to COVID.

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The ETCC is funded in part by ratepayer dollars and the California Statewide Emerging Technologies Program under the auspices of the California Public Utilities Commission. The municipal portion of this program is funded and administered by Sacramento Municipal Utility District and Los Angeles Department of Water and Power.