The impact of electric overhead radiant heating on the indoor environment of historic churches     

Lucyna Samek  Anna De Maeyer-Worobiec  Zoya Spolnik  Lszl Bencs  Velichka Kontozova  &#x;ukasz Bratasz  Roman Koz&#x;owski  Ren Van Grieken 《Journal of Cultural Heritage》2007,8(4):361-369

The impact of electric overhead radiant heaters on the microclimate, air flows, transport and deposition of suspended particulate matter (SPM) was monitored between March 2004 and March 2005 in the historic churches of Saint Michael Archangel in Szalowa and Saint Catherine in Cracow (Poland). The measurements show that although irradiation at the floor level increases temperature and reduces relative humidity in the interior of the church, the effect out of the heated zone and for the surfaces sheltered from irradiation is very limited, i.e. their extent is comparable with natural fluctuations inherent to the local climate of the church. The radiant heaters proved to generate little convectional flow of the air. Therefore, the heating system was not found to increase the concentration of SPM indoors; in particular, no re-suspension of particles already present in the church was observed. This work has demonstrated that the overhead radiant heaters are capable of providing localised heat to the areas where people congregate without adversely affecting painted walls and the works of arts displayed in churches. Care, however, should be taken that sensitive works of art are not exposed to the direct infrared radiation.  相似文献   

Conservation of stained glass windows with protective glazing: Main results from the European VIDRIO research programme     

Adriana Bernardi  Francesca Becherini  Marco Verità  Patrick Ausset  Maura Bellio  Ulrike Brinkmann  Helene Cachier  Anne Chabas  Felix Deutsch  Marie-Pierre Etcheverry  Franco Geotti Bianchini  Ricardo H.M. Godoi  Velichka Kontozova-Deutsch  Roger Lefèvre  Tiziana Lombardo  Peter Mottner  Chiara Nicola  Isabelle Pallot-Frossard  René Van Grieken 《Journal of Cultural Heritage》2013,14(6):527-536

The methodology of protecting the European stained glass windows against environmental risk (e.g. meteorological factors, air pollution, microorganisms) by means of an external glazing is not new. In spite of many scientific studies carried out in the last 20 years, some questions were still up for discussion. The European VIDRIO (2002–2005) project gave an answer to these questions. The research carried out by the different project partners established a new multidisciplinary approach aimed at evaluating the efficiency of the protective glazing systems and their effects on stained glass windows conservation, and finally at assessing the most appropriate strategy to preserve stained glass windows. Scientific results showed that the so-called isothermal glazing (i.e. ventilation by the air coming from the inside of the building) protected efficiently the ancient stained glass window from environmental attack (i.e. rain, pollutants, condensation, thermal shocks) with very limited secondary effects. The scientific research highlighted that its efficiency was strongly related to the technical design of the protective system. In particular, the ventilation and the size of the interspace had to be carefully considered. The research developed within the VIDRIO project was turned into general recommendations to the owners and practitioners on the best practice for the stained glass windows future conservation.  相似文献