Is throughput limiting your cold storage growth?
A warehouse can hold enough pallets and still refuse more volume. When pallets per day rise, the constraint moves to doors, docks, staging, defrost windows and pull-down duty. This review separates a storage problem from a throughput problem before anyone quotes equipment.
- •Inbound pallets per day (average and peak)
- •Outbound pallets per day and order profile
- •Door openings per day per dock
- •Number of loading docks and airlocks
- •Receiving temperature of incoming product
- •Product load: case picking vs full pallet
- •Blast freezing / chilling requirement per day
- •Operating hours and shift pattern
- •Target pallets per day
- •Additional customers or SKUs
- •Additional shifts planned
- •Loading frequency and vehicle schedule
- •Temperature requirements of new volume
- •Seasonal peak factor
Potential capacity constraints requiring technical review
Pull-down and infiltration load rise with movement, not with stored volume.
More door cycles mean more moisture, more frost and more defrost downtime per coil.
Additional heat rejection at design ambient, including summer peaks.
High-speed doors, air curtains and dock seals are usually the cheapest throughput gain.
Staging area sizing and buffer positions often cap pallets/day before the plant does.
Aisle strategy, pick faces and travel distances set pallets per operator hour.
Shuttle, AS/RS or conveyor interfaces where labour or aisle time is the binding constraint.
Added compressors, doors, charging and automation all draw from the same incomer.
Per-room and per-dock trending to identify where the load actually appears.
FAQ
Can a cold warehouse increase throughput without increasing floor area?
Often yes. Denser racking, better staging and pick-face design, faster doors, added dock capacity, defrost optimisation and additional shifts can raise pallets per day inside the same envelope. The limit is whether the refrigeration plant can absorb the extra infiltration and pull-down load that comes with more movement.
Why does throughput increase refrigeration load if storage volume is unchanged?
Every door cycle admits warm, humid air, and every warm inbound pallet must be pulled down to storage temperature. Both loads scale with movement. A store handling twice the pallets per day can see a materially higher peak load with an unchanged building.
What is the first thing to check when throughput is the constraint?
Measure where pallets actually wait: dock occupancy, staging saturation, defrost windows and picking travel time. In many facilities the binding constraint is dock and staging capacity or defrost scheduling — not compressor duty.
How much does a throughput upgrade cost?
Doors, dock equipment and controls tuning can start well under USD 250K. Once evaporators, additional plant capacity, electrical upgrades, extra docks or automation are involved, programs commonly move into the USD 250K–5M range. Use the growth planner for an indicative band before quoting.
Indicative planning guidance only. Detailed refrigeration sizing, dock design and automation selection require engineering calculations by qualified specialists.