Standardized shipping container (typically 20ft or 40ft) with integrated refrigeration unit, used for sea, rail, and intermodal transport.
RTD (Resistance Temperature Detector)
High-accuracy temperature sensor using metal resistance wire (typically platinum) whose electrical resistance changes predictably with temperature.
Screw Compressor
Twin rotating screws compress refrigerant continuously, used in large industrial systems.
Advantages:: High capacity, efficient for large loads, continuous operation
Scroll Compressor
Two spiral-shaped scrolls compress refrigerant, increasingly common in TRUs.
Advantages:: Quieter operation, smoother (less vibration), fewer parts, good efficiency
Strip Curtain (PVC Curtain)
Overlapping plastic strips hung in doorway to reduce air infiltration while allowing easy passage for people, forklifts, and carts.
TRU (Transport Refrigeration Unit)
Self-contained refrigeration system mounted on vehicle to maintain temperature-controlled cargo space. Can be diesel-powered, electric, or direct-drive.
Vacuum Insulation Panel (VIP)
High-performance insulation consisting of rigid panel with vacuum-sealed core, providing 5-10x better thermal resistance than conventional foam insulation per unit thickness.
WMS (Warehouse Management System)
Software system managing cold storage operations including inventory, order picking, temperature monitoring, and compliance documentation.