Central kitchens and institutional catering : keeping the cold chain under control from production to distribution

Logistics flows shaped by time pressure and compliance requirements

The logistics of a central kitchen are defined by extremely tight timing constraints. Meals have to be prepared, packed, distributed and consumed within very specific time windows determined by the schedules of the sites being served, whether that means school lunch hours, care service timetables or other operational requirements.

These time constraints go hand in hand with strict temperature requirements, depending on the type of distribution model in use.

• In hot holding systems, meals must be kept above +63°C from the end of cooking until they are eaten.

• In chilled distribution systems, meals are rapidly cooled after cooking, to below +10°C in less than two hours in line with HACCP requirements,

• Kept between 0°C and +3°C until they are reheated on site. In extended chilled systems, meals are prepared several days in advance and stored at low temperature, which gives operators greater flexibility in production planning.

Each of these distribution methods requires dedicated equipment and logistics procedures that are documented with great care.

Volume fluctuations: handling peak periods and quieter days

Central kitchens are exposed to major and often predictable changes in volume. School holidays can lead to a sharp drop in output, the Christmas period can create a peak for corporate catering, and unexpected events can suddenly drive demand upwards. These fluctuations require a flexible logistics organization capable of adapting quickly without compromising the quality and reliability of the cold chain.

Multiple delivery sites : a daily routing challenge

A medium-sized central kitchen may serve anywhere from 20 to 200 satellite sites. Planning delivery rounds, sizing the fleet of vehicles and insulated equipment, and organizing the return of containers such as gastronorm pans and delivery trolleys are all permanent logistics challenges that call for flawless coordination.

This closed-loop logistics model is not unique to central kitchens. Contrary to what is often assumed, the same issue exists in many institutional catering and temperature-controlled food distribution systems. In these operations, equipment is not simply delivered and left with the customer. Instead, everything functions as part of a closed-loop system in which each container has to be collected, cleaned, checked and put back into service for the next delivery cycle.

This operational constraint means return flows have to be managed just as carefully as outbound deliveries, with major implications for traceability, hygiene and equipment availability. Any disruption in this chain, whether it is a delay in returns, poor cleaning or lost equipment, can have a direct impact on the operator’s ability to carry out the next delivery round under compliant conditions.

Managing reusable containers therefore becomes a key driver of logistics performance, just as important as route planning or maintaining the cold chain itself. It requires accurate tracking tools, standardized procedures and close coordination between production, transport and receiving teams.

The European Hygiene Package and how it applies to institutional catering

The European food hygiene framework, commonly known as the Hygiene Package, includes a number of regulations that apply directly to central kitchens.

• Regulation (EC) No 852/2004 on the hygiene of foodstuffs requires operators to implement a full HACCP approach, including the documentation of temperatures throughout the logistics chain.

• Regulation (EC) No 853/2004 lays down specific hygiene rules for food of animal origin.

In France, these European rules are supplemented by the Order of 21 December 2009 on the health rules applicable to retail activities, storage and transport of food products and animal feed. Among other things, this text specifies the maximum permitted temperatures for each category of product.

These temperatures must be maintained from the moment products leave production right through to service. Any temperature deviation has to be documented and followed by immediate corrective action.

Temperature traceability across the entire logistics chain is a regulatory obligation for central kitchens. In practical terms, this means :

• Temperatures must be continuously recorded in storage areas, preparation zones and transport equipment.

• These records must be kept for a minimum period depending on the product, generally for the shelf life of the product plus a few additional days.

• Operators must also be able to retrieve the temperature history of a given batch quickly in the event of a complaint or an inspection.

Modern temperature monitoring systems now make it possible to automate much of this traceability, significantly reducing the administrative burden that used to fall on logistics teams.

Insulated roll containers: the workhorse of chilled distribution

In central kitchens operating chilled distribution systems, the insulated roll container is the standard piece of equipment for meal delivery. It offers several decisive advantages in this setting.

First, it provides high loading capacity. A standard insulated roll container can hold a large number of stacked gastronorm pans, which helps maximize the usable volume of each delivery. It also offers strong thermal autonomy. When fitted with eutectic plates that have been recharged in a cold room, a high-quality insulated roll container can keep products between 0°C and +3°C for 12 to 20 hours depending on the configuration, which is more than enough for even the longest rounds.

Beyond thermal performance alone, the use of insulated roll containers fundamentally changes the logistics organization of both central kitchens and satellite kitchens. They can serve as a genuine controlled-temperature buffer zone, making it possible to secure the cold chain without always relying on a cold room on site.

In practice, this means some facility kitchens, especially in healthcare, social care and education, can reduce or even avoid investing in heavy refrigeration infrastructure. In that context, the insulated roll container becomes a key part of the overall system, ensuring temporary storage, internal transport and meal availability while remaining fully compliant with regulatory requirements, particularly those derived from the Hygiene Package and HACCP standards.

Eutectic plates: the ideal source of cold for chilled distribution

For central kitchens, eutectic plates are the preferred solution when an autonomous source of cooling is needed. Their operating principle is simple and reliable. After being recharged at low temperature in a cold room for several hours, with a minimum of 24 hours before use, they store cooling energy which they then release gradually and evenly inside the container.

The temperature ranges covered by eutectic plates can be adjusted depending on the composition of the mixture used. A eutectic plate with a melting point of +4°C is ideal for meals distributed through the chilled chain, whereas a plate designed for -18°C is suitable for transporting frozen products.

Managing the equipment fleet: an operational issue that is often underestimated

Managing the fleet of insulated roll containers, bins and eutectic plates in a central kitchen is a major operational issue that directly affects the smooth running of daily activities. An insulated roll container that is out of service for maintenance, a missing eutectic plate on the morning of departure, or a gastronorm pan that was not collected from a customer can all disrupt deliveries and create tension with the sites being served.

Best practice includes :

• Carrying out regular and rigorous inventory

• Checks on the equipment fleet, implementing a systematic cleaning and inspection procedure between each use,

• Setting up a traceability system for the equipment through individual numbering and movement tracking,

• Maintaining a buffer stock of replacement equipment to cover periods of unavailability.

Managing return flows

The return of containers, including empty roll containers, gastronorm pans and depleted eutectic plates, is a logistics flow in its own right and needs to be planned and managed with the same level of discipline as outbound deliveries. Best practice includes :

• Collecting empty containers during the next delivery round as part of a standard exchange process,

• Cleaning and checking recovered containers before they are used again, and

• Recharging eutectic plates in the cold room as soon as they return to the central kitchen.

Digitalizing the logistics chain

Logistics management tools now make it possible to digitalize and optimize the full distribution chain of a central kitchen.

• Transport Management Systems help optimize delivery planning.
• Real-time vehicle and transport-condition monitoring tools provide better operational visibility.
• Electronic signature systems make it easier to confirm deliveries and record conditions on receipt. Centralized traceability platforms bring together all temperature data, making audits easier to manage.