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An “active” recovery system for air handling units.

Author(s) : GIANNONI R., PEDRINI D., PARENTI M., et al.

Summary

The solution has been studied to recover energy from the exhaust air of a ventilation system in a new building of the Hospital Sant’Orsola-Malpighi in Bologna. The new structure, with a total area of 24 000 m2, 13 operating theaters, 22 beds for intensive care unit, a 1000 m2 large Central Sterile Supply Department, 17 rooms for imaging and the new Emergency Department, has a ventilation system that handles 240 000 m3/h of external air. Because of the particular application every kind of contamination between the fresh and the exhaust air must be avoided and so the air is handled by four air handling units (AHU) and four extractors with no physical connection. Considering the quantity of air handled every hour, the importance of recovering energy from the exhaust air is evident and the classic scheme with an air/water coil on the extractor, an hydraulic circuit with a circulation pump and another air/water coil on the AHU was considered unsatisfactory. A water/water reversible heat pump (HP) has been placed between the two air/water coils and two different hydraulic circuits have been created to connect the primary circuit of the HP with the AHUs and the secondary one with the air extractors (AE).

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Pages: 151-159

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Details

  • Original title: An “active” recovery system for air handling units.
  • Record ID : 30001147
  • Languages: English
  • Source: Sources/sinks Alternative to the Outside Air for Heat Pump and Air-conditioning Techniques (Alternative Sources - AS), Padua, Italy, April 5-7, 2011. / International Sorption Heat Pump Conference (ISHPC11), Padua, Italy, April 6-8, 2011.
  • Publication date: 2011/04/05

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