About this presentation

related to ATMOsphere Europe 2011
published on 11 October 2011
12 pages
857 KB

CO₂ is thought to provide lower system efficiency for commercial refrigeration systems when compared with R404A.The reason for this is that the cooling capacity of the gas cooler is often under estimated, with the same outlet refrigerant temperature is assumed for both the gas cooler and condenser. Sanyo’s field test results on the other hand, show that the CO₂ direct expansion refrigeration system consumes less electricity than an equivalent R404A system. This is because we calculated the gas cooler capacity based on the measured gas cooler outlet temperature, after which we calculated the cycle efficiency. As a result CO₂ split cycle efficiency is as same as R404A cycle when in refrigerator mode, and actually higher when in the freezer mode.

About the speaker(s)

Gaku Shimada

 

In 1996, Gaku Shimada graduated from WASEDA University (with a Major in Applied Physics) and entered SANYO Electric Co.Ltd as a Mechanical Engineer of compressors. After receiving a Master degree in 2006 from Boston Univ., School of Management, he became the compressor sales manager as well as a strategic business planning manager of the new technology research department. Since 2017, Mr. Shimada has been the Manager of Strategic Planning of Condensing Unit Business and Overseas Sales, Cold Chain Business Division of Panasonic Corporation.