In the cold chain it is the trip that picks the equipment. The same frozen goods need one solution on a two-hour urban round and an entirely different one on an eighteen-hour line. In the six situations below a refrigerated vehicle is clearly the right answer.
1. When unbroken carriage runs beyond 24 hours
This is where passive cooling reaches its limit. The figure GEBHARDT gives for eutectic plates or dry ice is up to 24 hours, and outside temperature and door openings shorten it. If loading, customs and waiting at delivery push a carriage plan past 24 hours, a system that produces cold is needed.
2. When the trip is long distance with a full load
Once the body is cold and the door is shut, a reefer works efficiently. Holding one regime steady across a large volume for hours is what the unit is best at. On intercity lines and full-load deliveries to a single point, trying to change that arrangement buys nothing.
3. When the door stays open for long periods
In some loading patterns the door stays open for hours at a time: wholesale markets, produce halls, long manual loading. A closed container loses its advantage there, because the box itself stays open too. A system that keeps cooling the body suits that case better.
4. When the contract requires active refrigeration
Some buyers and some tenders require active refrigeration during carriage and vehicle-level records. That may not be a technical necessity, but it is a contractual clause. Where such a clause exists the argument is commercial rather than technical, and unless the clause changes, a reefer is required.
5. When goods wait inside the vehicle
There are loads that are packed at night and delivered in the morning, that queue at a dock, that sit in the vehicle until the delivery slot. Once waiting is added on top of the round, the passive window comes under pressure. In such an operation either the waiting is removed or active refrigeration is used.
6. When one regime is needed across a large volume
In shipments that run at a single temperature, at pallet level and with a full body, working with boxes multiplies the number of units and makes handling heavier. If the whole load shares one regime and the volume is large, cooling the body is the simpler answer.
Where a reefer is over-specified
| Situation | Why it is too much |
|---|---|
| Urban round with 10-30 drops | Every door opening swaps the body air with the street; cooling starts over at each drop |
| One to three pallets of chilled goods per round | The unit cools the whole body and the fuel burns for the whole body |
| A business with a 3-4 month season | The vehicle books cost for twelve months |
| Dry, chilled and frozen on one route | A compartmented body is needed; separate containers do the same job for less |
| Distribution with electric vehicles | The refrigeration unit eats into range |
| A vehicle that carries dry goods most of the year | Refrigeration equipment takes volume and payload |
Do the rules require a reefer
For general food carriage, no. Türkiye's Food Hygiene Regulation requires that the vehicles and/or containers used to carry food hold the appropriate temperature where necessary and allow it to be monitored; no technology is named. For quick-frozen food, ambient temperature must additionally be recorded with date and time throughout carriage and the records kept. In international carriage the ATP agreement defines equipment classes and their certification.
The rules, in other words, look at the outcome: the right temperature and a traceable record. Which equipment delivers that is the operator's decision.
Running a hybrid
In practice a hybrid arrangement gives the healthiest result: reefers on long lines and full loads, containers on urban distribution and partial loads. With both set up in the same depot, each route runs on its own economics. A container can also be used inside a refrigerated body, where it becomes a second shell protecting the goods during door openings.
If you are not sure which side your own route falls on, send Aris Makina your trip duration, drop count, cold volume per trip and months worked per year; we will assess the profile with you and set the right arrangement.
