One number tells the whole story of a city round: how many times the door opened. On a twenty-drop round the body meets outside air twenty times, and the waiting while the driver looks for a parking space comes on top.
Why door openings are counted
The Turkish Ministry of Education's vocational module sets out the mechanism: the moment the door opens the cold air runs downwards and warm air takes its place. On a forced-air body the time the door stays open means fuel burnt for nothing, cooled air thrown out by the evaporator fan and warm, humid air coming in.
On a round built around closed containers that cycle stays in the body. As long as the container is not opened, the cold around the goods is inside it; the body air may warm up without warming the load.
| Type of round | Door openings | What the loss tracks |
|---|---|---|
| Long haul, single unload | 1-2 | time on the road |
| Regional route | 5-8 | time and stops |
| Urban round | 15-30 | number of stops |
Waiting in traffic
On a stationary vehicle the refrigeration unit keeps running - either the engine idles or the unit's own diesel is at work. For a container the cost of waiting is nil: its cold was prepared at the depot, and what traffic consumes is only time.
Night and early-morning delivery
Urban delivery windows often move into the night, and there the noise of a unit becomes a constraint: a refrigeration unit running in a residential street produces complaints. A round built on containers is silent.
Three decisions that build the round
- Delivery order: the most sensitive load goes into the container opened last.
- Number of containers: two if the route splits in two, one per regime if the load is mixed.
- The return: the empty container comes back on the same round and is prepared again in the evening.
How it is set up
Send us your daily number of drops, the length of the round and the regimes you carry, and we will work out how many containers it takes and which size fits.
