Definition: The surrounding air temperature of the environment. In cold chain, typically refers to outside temperature affecting refrigeration system performance.
Why It Matters:
- Affects refrigeration system capacity (higher ambient = reduced capacity)
- Influences heat load calculations
- Determines equipment sizing requirements
South African Context:
- Gauteng summer: 25-35°C typical, 40°C+ extreme
- Western Cape: Milder, 15-30°C typical
- Northern Cape: Very hot, 35-45°C summer
- Coastal regions: Humid, 20-30°C typical
Design Consideration: Equipment must be rated for maximum expected ambient temperature (typically 43-46°C for South African conditions).
Related Terms: Design Temperature, Heat Load, Ambient Derate