The document reviews air conditioning systems in the Russian Museum and the Archive of Mikkeli, assessing whether they meet the necessary thermal conditions for preserving materials. It highlights issues such as insufficient humidification and temperature control, providing recommendations for improvement. Specific suggestions include using better humidifiers and adjusting heating systems to create more stable indoor climates.

2. Maintaining thermal conditions in exhibition of Russian Museum and in Archive of Mikkeli Student: Natalia Ladygina Supervisors: Marianna Luoma, Heikki Salomaa 14.12.2009

3. Background Material of exhibit determines storing conditions Conditions in museums and archives vary Requirements are defined by the Standards Air temperature Relative humidity Air velocity Air change rate (in some cases) Climate control by air conditioning system and automation system

4. Aims Studying air conditioning systems in Russian Museum and Archive of Mikkeli Finding out whether they provide required conditions or not If not, giving the reasons why and recommendations about improving the indoor climate

5. Methods and materials Literature review Influence of conditions on the materials Standards and requirements Air conditioning systems and equipment Russian Museum Exhibition of wooden furniture and fabric Interview with the head of Climatology Department Drawings of AC-systems Diagrams of temperature and relative humidity Archive of Mikkeli Archives of books and microfilms Drawings of AC-systems Measurements of temperature and relative humidity

6. Results 45 35,5 ± 0,3 38,2 ± 0,5 18 18 ± 0,1 17,6 ± 0,4 Modern archive of books #2, Archive of Mikkeli (December) 45 43 ± 0,6 45 ± 0,6 18 16 ± 0,1 15,7 ± 0,1 Archive of books #1, Archive of Mikkeli (December) 30...40 31 ± 6 16...18 or lower 14 ± 1 Archive of microfilms, Archive of Mikkeli (December) 50…55 47 ± 3 18…22 24,5 ± 1 Exhibit of wooden furniture and fabric, Russian Museum (June) 50…55 48 ± 3 18…22 23,5 ± 1 Exhibit of wooden furniture and fabric, Russian Museum (May) Required RH, % Average RH, % Required T, ºC Average T, ºC Place (month of measurement)

7. Analysis of the results Reasons why the required conditions were not provided: Exhibit of wooden furniture and fabric, Russian Museum Heat gains from solar radiation Heat gains from visitors Low capacity of humidifiers Archive of books #1, Archive of Mikkeli Inability of AC-system to maintain constant indoor conditions Location inside the rock Modern archive of books #2, Archive of Mikkeli Drying effect of the radiators

8. Conclusions and recommendations To improve the indoor conditions I would recommend: For exhibit of wooden furniture and fabric, Russian Museum To apply Venetian blinds To buy more movable humidifiers or replace them with more efficient ones For archive of books #1, Archive of Mikkeli To apply movable heat emitters with the low output For modern archive of books #2, Archive of Mikkeli To reduce the output of the radiators and increase the heating output of the AC-system To add a humidifier to AC-system

9. Thank you for your attention!