Food and beverage plants, with their dual appetite for heat and cold, are emerging as ideal candidates for waste-heat-driven absorption chilling. By using thermal energy that would otherwise be rejected, these facilities are displacing electric compression cooling and trimming peak demand charges.
The model is straightforward: high-grade waste heat from pasteurization, sterilization, or boiler flue gas drives a lithium bromide absorption chiller that produces chilled water for process and storage. Where heat is available at 90°C or above, single-effect units deliver COPs competitive with electric chillers on a primary-energy basis.
Dairy, brewing, and ready-meal producers report the largest gains, often integrating recovery heat exchangers upstream of the chiller to stabilize supply temperature. The result is a self-reinforcing loop: less grid electricity, lower carbon intensity, and steadier production costs.
Engineers caution that successful deployment depends on matching heat-grade to chiller type and ensuring year-round cooling load. Hybrid systems that blend absorption and mechanical cooling provide the flexibility needed for seasonal demand swings.
With refrigeration accounting for a large share of food-sector electricity, heat-driven cooling is positioned to become a standard efficiency measure rather than a showcase project.