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Application of an Air Pollution Modelling Tool to Cultural Heritage Buildings

UCL CENTRE FOR SUSTAINABLE HERITAGE. Application of an Air Pollution Modelling Tool to Cultural Heritage Buildings. Dr Nigel Blades UCL Centre for Sustainable Heritage. Model outputs: Indoor pollutant concentration or I/O ratio Which surfaces absorb most pollutant

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Application of an Air Pollution Modelling Tool to Cultural Heritage Buildings

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  1. UCL CENTRE FOR SUSTAINABLE HERITAGE Application of an Air Pollution Modelling Tool to Cultural Heritage Buildings Dr Nigel Blades UCL Centre for Sustainable Heritage

  2. Model outputs: Indoor pollutant concentration or I/O ratio Which surfaces absorb most pollutant Relation between I/O ratio and ventilation rate IMPACT pollution model - JAVA applet implementation of pollution mass balance equation of Weschler et al. (1989)

  3. Metal walls and ceiling Glass end walls Open plan display area Mechanical ventilation but not air conditioning Close relation to outdoor environment Case study 1: Sainsbury Centre for Visual Arts, Norwich, UK

  4. Sainsbury Centre for Visual Arts Table 1: Data on the SCVA used in the modelling

  5. IMPACT modelling of the SCVA How can pollution control be improved at the SCVA?

  6. IMPACT modelling of the SCVA

  7. Concrete walls and floors Most glazing covered over Naturally ventilated, but building tightly sealed Stair well Entrance lobby Internal doors Door to outside Case study 2: Factory building converted into an archive store modelled zone

  8. Data used to model the archive store

  9. IMPACT modelling of nitrogen dioxide at the archive store

  10. IMPACT modelling of the archive store – results for all gases

  11. IMPACT modelling of the archive store – results for all gases Is this good for conservation of the collection?

  12. IMPACT modelling of the archive store – pollution effects on the collection

  13. IMPACT modelling of the archive store – comparison with measured data

  14. Reasons for discrepancy between measured and modelled data • Amount of active surface area in the building has been underestimated • Single zone model does not allow for air infiltration from other zones (rooms) • Enhanced pollution deposition around cracks and crevices where air infiltrates • Homogeneous chemistry?

  15. Conclusions • IMPACT model can quickly and easily estimate the contribution of outdoor pollution to indoor environment, using a simple deposition model • Help understand relation between air pollution and buildings • Teaching aid for conservators in UK and Malta, COST G8 Training School • In use by heritage organisations, e.g. English Heritage

  16. European project details IMPACT, Contract No. EVK4-CT-2000-00031, ‘Innovative Modelling of Museum Pollution and Conservation Thresholds’ (2000-04) http://www.ucl.ac.uk/sustainableheritage/impact

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