Archives constant temperature and humidity machine - the ideal "housekeeper" of the collection of materials

2023-10-28 16:13:51 admin 18

Archives constant temperature and humidity machine - the ideal "housekeeper" of the collection of materials


The archive is a place where important archive materials are kept. Too high or too low temperature and humidity in the archive will affect the durability of the archive materials.


Therefore, as early as 1923, archival scholars have proposed that the environment of high temperature and humidity is one of the important threats to the maintenance of archives. The Society of Archivists has also emphasised many times in academic forums that the regulation of temperature and humidity in archival repositories has a great deal to do with the protection of archives and the extension of their lifespan.


MetInfo enterprise content manager system | MetInfo CMS


Temperature and humidity requirements for archive repositories in China


The Temporary Provisions on Temperature and Humidity Management in Archives is a control method on temperature and humidity management in national archives issued by the State Archives Administration in 1985 circular, which is applicable to comprehensive archives and repositories at all levels. System and professional archives, in addition to the requirements of the profession, should refer to the implementation. Among them, the temperature and humidity requirements of the archives repository for the archives temperature 14 ~ 24 ℃, relative humidity 45% ~ 60% RH; heating library temperature is not less than 14 ℃, relative humidity is not less than 45%; summer temperature is not greater than 24 ℃, relative humidity is not greater than 60%. Fluctuations per day and night, the temperature does not exceed ± 2 ℃; relative humidity does not exceed ± 5%.


The development of this standard requirement is in the comprehensive consideration of China's national economic conditions and climatic conditions, as far as possible to facilitate the preservation of materials made of archives and limit the growth and reproduction of archival moulds and fungi under the environmental requirements of the development.


MetInfo enterprise content manager system | MetInfo CMS


The importance of using a constant temperature and humidity machine

In a closed warehouse, a constant temperature and humidity machine can exchange heat between the refrigerant and air, reduce the air temperature below the dew point temperature, and condense a portion of the water vapor in the air into water to achieve dehumidification. Indoor humid air is sucked in through the inlet fan and cooled through a heat exchanger. The moisture in the humid air condenses into small water droplets, achieving the goal of reducing humidity. The condensed water droplets are discharged through drainage pipes.
For example, the southwestern region of China belongs to a subtropical monsoon climate, with mainly moderate rainfall, with an annual rainfall of over 340 millimeters. The overall distribution of annual precipitation is "more in the east and less in the west". Most of Chongqing, Sichuan Basin, Guizhou, and Yunnan regions are rainy areas, making it even more difficult to store local archives. At this time, if equipped with corresponding constant temperature and humidity machines, it can achieve twice the result with half the effort.


MetInfo enterprise content manager system | MetInfo CMS



E-mail
tel