Has anyone calculated or have access to the R 404A maximum refrigerant charge as provided for some other refrigerants in Table 2 on Page 310 of the BD+C Reference Guide?

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Ante Vulin

Sustainability Manager

YR&G

LEEDuser Basic Member

55 thumbs up

Fri, 09/07/2012 - 13:28

Cassidy, this is pretty simple to do. You can use the Refrigerant Management Calculator available here on LEED User under "Documentation Toolkit" for this credit to check the compliance for a given 404a charge, or you can use the ODP and GWP values from the reference guide and solve the equation for Rc.

Maria Porter

Sustainability specialist

Skanska Sweden

LEEDuser Basic Member

205 thumbs up

Mon, 10/08/2012 - 11:40

Ante, I got information about two of my cooling machines for a large supermarket. They have carbon dioxide as refrigerant. The actual cooling capacity is 120 kW per machine (34.12 tons of refrigeration) and 200 kg CO2 (440.92 pounds) per machine. If I divide; 440.92/34.12 I get 12.92. Rc is only allowed to be between 0.5 and 5. In the calculator you mentioned, CO2 is not even in it. Any tips on why there is a max limit for Rc? What am I not understanding?

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R 404A Maximum Refrigerant Charge?

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