Pharmaceutical and Cleanroom Exhaust Heat Recovery

목차

harmaceutical plants and cleanrooms move huge volumes of HEPA-filtered air. Codes generally forbid recirculating exhaust that may carry contaminants, but the energy in that air can still be recovered using physically separated exchangers.

  • GMP and HVAC codes require exhaust from containment areas to be discharged, not reused.
  • Cross-contamination could compromise product quality.
  • Separated cores transfer only heat, never air or particles.

Technology Fit for pharma/cleanroom
Plate (counter-flow) Excellent - zero carryover, washable
Heat pipe Excellent - no moving parts, isolated streams
Run-around coil Good when exhaust is remote from supply
Rotary wheel Avoid - carryover risk despite purge

  • Recover heat from general AHU exhaust, not containment exhaust.
  • Pre-heat or pre-cool make-up air for gowning and support zones.
  • Use stainless or coated cores where cleaning agents are present.
  • Validate with the qualified person (QP) before commissioning.

Can I recover heat from a containment booth?
Only the sensible heat via a separated core on the general exhaust; the contaminated stream itself stays one-way.

Does recovery affect classification?
No, if the recovery core sits outside the classified zone and keeps streams separate per design.

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