INCORPORATING COLD CHAIN
FEATURE
( VRF) technologies or sophisticated chillers configured for fine-grained modulation.”
Manufacturers are moving toward natural refrigerants like CO₂ and ammonia, driven both by environmental goals and the superior thermal properties these refrigerants offer. CO₂ systems are gaining ground in laboratories, blood banks and precision testing facilities where clean operation and tight temperature control are critical. Ammonia remains widely used in food and beverage plants for its high efficiency, though it requires rigorous safety measures.
Ferdinandi explains that fundamentally, process cooling is not a variant of air conditioning – it is a branch of production engineering.“ Its purpose is to sustain or replicate the conditions under which a process performs optimally. The tolerance for error is minimal, and success depends on understanding the process as deeply as the technology itself.”
INTEGRATING PROCESS COOLING AND HVAC FOR NEXT- LEVEL EFFICIENCY
As industrial facilities push toward higher efficiency and smarter energy use, refrigeration systems are increasingly being viewed not as stand-alone utilities, but as the central intelligence of the entire plant environment. A growing design philosophy positions the refrigeration plant as the operational‘ brain’ – with HVAC, wet services, heating requirements and even parts of the electrical load arranged around its thermodynamic capacity.
Instead of traditional project delivery where refrigeration, HVAC and electrical systems are designed independently, the new approach treats refrigeration as the anchor that co-ordinates all other thermal demands. This enables dynamic control across the site, ensuring that heat, cold and energy flow where they are needed with
Industrial plants are under unprecedented pressure to curb their environmental footprint. minimal loss.
One of the most impactful opportunities lies in processing plants, where heating, cooling and rapid temperature transitions occur simultaneously. With high heatrecovery potential and precise thermal control, CO₂ systems are increasingly being used as the backbone for integrated designs. Beyond their core cooling duty, these systems can deliver high-grade heat suitable for hot-water services, space conditioning or humidity management, reducing reliance on conventional electric boilers and standalone HVAC equipment. A key technique enabling deeper efficiency is the move toward direct CO₂-toair( DX) designs. By eliminating unnecessary intermediate steps – such as transferring energy from refrigerant to water and then from water to air – these systems minimise thermodynamic losses. The result is a more responsive and efficient plant that more closely follows real process loads.
Integration also opens the door to advanced load management. During offpeak or low-demand periods, cold rooms can be strategically overcooled – for example from-18 ° C to-25 ° C – turning them into thermal batteries. This extra thermal storage provides a buffer that can ride through several hours of grid instability or reduce the need for backup power during outages. Rather than being passive infrastructure, the cold store becomes an active energy-management asset.
Heat recovery within the integrated system further extends its usefulness. Discharge heat that would otherwise be rejected can be captured for dehumidification, space heating or preheating of process air. In facilities where humidity and temperature must be tightly controlled, this interconnected approach allows HVAC systems to benefit directly from refrigeration waste-heat streams without the need for additional equipment.
Supplied by John Ackermann
The chillers cool freshly slaughtered carcasses from an average of 35 ° C( photo from previous article regarding a project of an abattoir).
January / February 2026 COLD LINK AFRICA
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