It is not uncommon for some vehicles to have 30, or even 50 or more, drops per day. This is to meet the growing trend of intense just-in-time production schedules placed on operators, whereby load rejection is both extremely costly and threatens contractual failure. There are a few basic principles that, when followed, will help achieve the greatest return on investment from a Transcan® temperature recorder system.
It is important that products are brought to the correct temperature in the warehouse before transit. Loading improperly prepared cargo will mean the refrigeration system is working overtime, to chill the load to the thermostat set point before the first drop is made, which is less than ideal with regard to an intense multi-drop schedule! Indeed the system might never chill the load correctly if the doors are in regular use.
It’s important to remember that the refrigeration unit has been designed to maintain temperature only. Correctly bringing the cargo to the right temperature before despatch will improve the life of the refrigeration system, whilst having a positive effect on green credentials, and improve the bottom line by reducing the quantity of fuel used.
Any temperature sensitive cargo should be loaded in a way which doesn’t obstruct the flow of supply air from the refrigeration system. Products stacked too high through the vehicle will mean the cool air circulates at the bulkhead failing to provide sufficient airflow towards the rear of the vehicle. This will potentially cause the product towards the rear to spoil from receiving insufficient cooling. Product too close to the system evaporator is likely to experience freezing which often causes spoilage in chilled produce. Products loaded above recommended height will normally cause the refrigeration unit to frequently enter defrost status as a build-up of ice occurs, time spent in defrost is time not spent cooling.
Door Open, Fans Off
For each delivery the refrigeration fans should be turned off when the rear doors of the vehicle are
open. Minimising the length of time the doors are open at each drop also improves refrigeration performance. The humidity in the warm air that enters is released as it cools. This causes condensation on the evaporator which in turn freezes forcing the refrigeration unit into defrost. Reducing this will further increase the life of the refrigeration engine and reduce the amount of fuel wasted in cooling the outside environment.