The temperature above which a gas cannot be liquefied regardless of pressure applied. Each refrigerant has a specific critical temperature.
Cross-Docking
Logistics practice where incoming products are unloaded from inbound vehicles and directly loaded onto outbound vehicles with minimal or no storage time. Reduces handling and warehousing costs.
Cryogenic Shipping
Transport and storage using ultra-low temperatures achieved with dry ice (-78.5°C) or liquid nitrogen (-196°C) instead of mechanical refrigeration.
Cryogenic Temperature
Extremely low temperatures, typically below -150°C, achieved using liquid nitrogen (-196°C) or dry ice (-78.5°C).
DALRRD (Department of Agriculture, Land Reform and Rural Development)
Definition: Department of Agriculture, Land Reform and Rural Development. The South African government department responsible for agricultural policy, regulation, and development, including oversight of agricultural product exports and food safety for products of animal origin. Why It Matters: DALRRD certification is essential for agricultural cold chain exports. Compliance with meat safety regulations is mandatory for domestic meat transport and storage.…
Data Logger
Standalone electronic device that records temperature (and sometimes humidity, light, shock) over time using internal memory.
Deep Frozen (Deep Freeze)
Temperature range of -25°C to -40°C, colder than standard frozen storage. Used for long-term preservation and specific products requiring ultra-low temperatures.
Defrost Cycle
Periodic process of removing ice buildup from evaporator coils. Ice accumulation reduces heat transfer efficiency and airflow.
Department of Employment and Labour
Definition: The South African government department responsible for employment policy, labour relations, and occupational health and safety enforcement, including workplace inspections for OHS Act compliance. Why It Matters: The Department enforces occupational health and safety legislation in workplaces, including cold chain facilities. Non-compliance can result in prohibition notices, fines, or prosecution. Cold Chain Relevant Functions:– OHS Act compliance inspections– Pressure…
Dew Point
The temperature at which air becomes saturated with moisture and water vapor begins to condense. Critical for preventing condensation in cold chain environments.