In temperature-controlled transport you either produce cold along the way or store it in advance and draw on it on the road. The first is an active container with its own refrigeration unit, the second a passive container running on eutectic plates or dry ice. The price of the active container is a power connection, unit maintenance and the risk of failure; when the unit stops, cold production stops with it.
A passive container has no moving parts. A container such as the Isotec TBX holds cold with its insulation, needs no electricity and lets frozen and fresh goods travel in the same cargo space of an ordinary truck. The trade-off is a limited duration: GEBHARDT gives a safe cold chain of up to 24 hours for the TBX, and the depot needs capacity to freeze the plates.
The choice follows from the route in three questions:
- Is the wait uncertain, or can it be calculated? If uncertain, an active container; if it can be calculated, a pre-cooled full passive container is enough.
- Are there many stops? In multi-stop city distribution the door opens often, and a passive container fits a standard vehicle.
- Is there power on the road or at arrival? Without it the active solution needs a generator or vehicle supply, and the passive container is the natural option.
Cost is not compared on purchase price. On the active side write down energy, maintenance, spare parts and downtime; on the passive side the plate investment, freezing energy and preparation labour. In most businesses the two are not rivals but answers for different flows: the long leg runs active, the last mile passive, and holding the regime at the transfer point where the two meet is the critical moment.
