This product is a PDF that contains links to files that consist of PowerPoint slides synchronized with the audio-recording of the speaker (recorded presentation), PDF files of the slides, and audio only (mp3) as noted.

The refrigeration systems in food stores and supermarkets continuously operate to maintain proper food storage temperatures. During the operation, the evaporator coils require periodic defrost, which poses adverse impact on food safety. This study attempts to explore methods of minimizing the number of times these units go through the defrost cycle. The research focuses on using coils with hydrophobic material properties to repel moisture and a demand-defrost controller for walk-in freezers that activates the defrost cycle only when frost forms on coils and not at usual prescribed periods.

1. Manager
Ramin Faramarzi, P.E., Member, Southern California Edison, Irwindale, CA
Product Contains: Slides (pdf), Recorded Presentation, Audio (mp3), Recorded Presentation (flv)

2. Engineer
Sean Gouw, Associate Member, Southern California Edison, Irwindale, CA
Product Contains: Slides (pdf), Recorded Presentation, Audio (mp3), Recorded Presentation (flv)

3. Research Engineer II
Denis Livchak, PG&E Food Services Technology Center, San Ramon, CA
Product Contains: Slides (pdf), Recorded Presentation, Audio (mp3), Recorded Presentation (flv)

Run Time: 90 mins.

Citation: ASHRAE Seminar Recordings, 2015 Annual Conference, Atlanta, GA