Spray Booth Exhaust Heat Recovery Using Cross-Flow Plate Exchangers
Spray booths and coating lines exhaust large volumes of warmed air - much of it carrying solvent vapour and overspray. Discarding that heat and reheating make-up air is expensive, especially in winter. A cross-flow air-to-air heat exchanger recovers the sensible heat while keeping the contaminated exhaust strictly isolated from the supply stream.
Keeping streams separate
The defining advantage of the plate design is the solid wall between airstreams. The VOC-laden booth exhaust never contacts the fresh make-up air, so there is no risk of painting fumes re-entering the booth or the workspace. Heat still moves efficiently across the plate by conduction.
What operators gain
- Lower make-up air heating cost: pre-heated make-up air cuts gas or electric heater runtime.
- Stable booth balance: recovering heat without adding moisture helps hold the temperature and pressure balance the spray process needs.
- Compliance-friendly: the separated core sits upstream of any abatement unit, reducing the load on oxidisers or scrubbers.
Integration tips
Size the core for the booth's design exhaust volume and the temperature rise you want on the make-up side. Where overspray is a concern, specify accessible plates and a coating that resists fouling, and keep a maintenance window for inspection.
Our application engineers model cross-flow recovery for paint, powder and coil-coating lines. Contact us to scope a unit for your booth.