Description

Carbon dioxide (R-744) is one of the naturally occurring compounds collectively known as “natural refrigerants.” It is nonflammable and nontoxic, with no known carcinogenic, mutagenic, or other toxic effects, and no dangerous products of combustion. Using carbon dioxide in refrigerating systems can be considered a form of carbon capture, with a potential beneficial effect on climate change. It has no adverse local environmental effects. In recent years, CO₂ has once again become a refrigerant of great interest. However, high-pressure CO₂ systems [e.g., 490.8 psia (3.4 MPa) at a saturation temperature of 30°F (-1°C), or 969.6 psia (6.7 MPa) at 80°F (26.7°C)] present some challenges for containment and safety.
Applications
System Design
System Safety
Piping
Heat Exchangers and Vessels
Compressors for CO2 Refrigeration Systems
Lubricants
Evaporators
Defrost
Installation, Start-up, and Commissioning

Citation: 2018 ASHRAE Handbook–Refrigeration

Product Details

Published:

2018

ISBN(s):

9781939200976

Number of Pages:

12

Units of Measure:

I-P

File Size:

1 file , 760 KB

Product Code(s):

D-R032018IP