Yes, pallet shuttle racking can be used for temperature-sensitive goods, and cold storage is actually one of the applications where dense pallet storage has obvious value.
There is a simple reason. Cold space is expensive.
You pay for the building, insulation and refrigeration, so leaving large areas for forklift aisles is more costly than it would be in a normal warehouse. Moving pallets deeper into the rack with a shuttle is therefore attractive.
But we would not decide on a shuttle system just because a warehouse operates at -18°C or -25°C. In the cold-storage projects we have worked on, the inventory structure usually tells us more than the temperature does.
Take a fruit company as an example.
The customer needed both frozen and fresh storage. The frozen warehouse operated at -18°C with 1,062 pallet locations, while another area was maintained at 0–5°C and provided 4,020 locations.
We used Pallet Two-Way Shuttle Robots in the storage lanes and Fork AMRs in front of the racks.
Why split the work this way?
There was no need to automate every movement inside the building. The repetitive part was getting pallets into and out of deep storage lanes. That was handed to the shuttle. The Fork AMRs took care of transfer between the rack and the surrounding operating areas.
After implementation, space utilization reached approximately 90%, with total storage capacity of 5,458 tons.
For this project, however, we spent quite a lot of attention on something that does not appear in the shuttle specification: which products should share a lane.
Fresh agricultural products have turnover requirements. If pallets are assigned poorly, a very deep rack can actually make daily work more troublesome. You may gain storage positions and then lose time moving the wrong pallets out of the way.
So SKU quantity, batch size and FIFO requirements have to be checked before deciding how deep the lanes should be.
That experience is also why I would be cautious about saying that "deeper is always better" in a cold store.
It isn't.
A customer with 30 pallets of one frozen-food SKU can make very good use of a deep lane. Another customer with 30 pallets belonging to 20 different SKUs has a completely different problem.
The second warehouse needs access more than depth.
We saw another version of this problem in a large cold-chain logistics center.
The customer had both B2B and B2C operations. B2B orders tended to move larger quantities, while the B2C side had more SKUs and more frequent picking.
We did not use one storage layout for both.
The B2B cold rooms adopted Pallet Two-Way Shuttle Robots because concentrated full-pallet inventory made deep storage worthwhile. The B2C areas used another arrangement where access to individual products was more important.
Overall capacity increased by about five times, and one cold room could hold as many as 17,000 pallets.
The interesting part of that project was not the 17,000-pallet figure. It was the decision not to put shuttle racking everywhere.
That is a decision I think cold-storage operators should pay attention to.
What about the goods themselves?
Once the layout is right, temperature becomes an equipment issue.
DELIECN Pallet Two-Way Shuttle Robots can be configured for operation from -25°C to +40°C. For a freezer project, we also have to consider low-temperature effects on the battery, lubrication, sensors and electrical components.
Maintenance deserves attention too.
Nobody wants technicians spending unnecessary time inside a -25°C rack looking for a fault. Equipment accessibility, fault diagnosis and the way a shuttle can be taken out for service should therefore be discussed while the system is being designed, not after commissioning.
Charging is another detail worth checking. The answer depends on how long the shuttle runs, how frequently the lane is accessed and where the charging point can be arranged. A shuttle working continuously in a high-turnover frozen-food lane does not have the same duty cycle as one handling slower-moving reserve stock.
Then there is WMS.
For temperature-sensitive products, I would regard inventory logic as part of the storage system rather than an optional software function.
The shuttle knows how to move a pallet. It does not decide whether Batch A should leave before Batch B.
WMS handles that information: SKU, location, batch and FIFO/FILO rules. The physical lane layout needs to make those rules executable.
This becomes particularly important when the rack is nearly full. A badly planned conventional warehouse is inconvenient; a badly planned deep-lane warehouse can lock the wrong inventory behind other pallets.
So, when would I use pallet shuttle racking?
I would look seriously at it when a cold store has palletized goods, expensive refrigerated space and reasonable pallet depth per SKU or batch.
Frozen food held in volume is an obvious example. Agricultural products can also work well when their batch and rotation rules are properly considered.
I would be more cautious with a warehouse dominated by many SKUs in very small pallet quantities. In that situation, another rack layout-or a combination of several storage methods-may be better.
That is probably the most useful answer to the original question.
Pallet Shuttle Robot Racking handles temperature-sensitive goods well when the rack is designed around the goods, rather than asking the goods to fit a standard shuttle layout.
The temperature tells us how the equipment must be configured. The actual inventory tells us how the warehouse should be built.
