Preservation Systems
Desiccant dehumidifier provides dry air to the required space to ensure tumidity tolerances are obtained. Desiccant dehumidifier provides preservation of the books, artwork and other organic materials that under normal environmental conditions thrive which cause irreversible damage. Other benefits of a desiccant system provide mold prevention to the dehumidified space making it more hygienic. These systems have been implemented into the following libraries and archives around Australia:
Rockhampton University- National archives Australia Villawood
- University Newcastle
- Newcastle council
- Canberra Museum
- Katoomba Gallery
PRESERVATION
Recommendations by NLA http://www.nla.gov.au/pres/conver/100196.html
1. Humidity
Generally, it is recommended that relative humidity remain at 50% with a maximum change of plus or minus 5% per month.
2. Temperature
Most moulds thrive at warmer temperatures. Temperatures below freezing will not kill mould, but they do make it dormant.
For patron comfort, temperatures of 21 Celsius plus or minus 2 are acceptable in libraries, provided relative humidity is kept at 50%
Recommendations by NLA http://www.nla.gov.au/pres/conver/100196.html
BBC British Film Institute – Nitrate film store using Seibu Giken DST http://www.bbc.co.uk/news/entertainment-arts-14665763
CASE : National Archives of Australia
Desiccant Dehumidifier Upgrade
Ryan Wilks recently completed air conditioning modifications at the National Archives of Australia Chester Hill repository in the Security Vault and Low Temperature Film Vault areas.
The National Archives site provides storage of permanent Commonwealth records of enduring value and in many instances the stored records are irreplaceable. The Chester Hill site contains approximately 90% of the audio-visual records and 40% of the paper records held by the National Archives of Australia. The conditions within the building must be strictly controlled and monitored to maintain the life of the records stored within each area.
Originally the security vault and low temperature film vault were being served (dehumidified) from common desiccant units serving the film vault and inter-connecting duct and dampers.
Due to lowering of temperature within the film vault this meant that a new stand alone desiccant dehumidifier had to be installed to serve the security vault.
Whilst the change over of the two existing low temperature film vaults was relatively quite simple the work had to be planned and staged so that the conditions within the room ( 9oC +/- 1OC and 30%RH +/- 2% RH) were maintained at all times. The work, disconnect, replace, re-connect commission had to be completed in two four hour windows and involved four separate trades.
As part of our tender submission Ryan Wilks in addition to offering a
complying tender submission for the new Security Vault unit Ryan Wilks offered for consideration the supply of Seibu Giken desiccant unit. We are please to say that National Archives advised that Ryan Wilks were the only tender submission to offer an alternate option and that this innovation went a long way to securing the prestigious project. Our alternate unit enabled the National Archives to integrate a new supplier into their system on a small scale for evaluation and to open up the marketplace and stop any monopolisation by any one supplier.
The Security vault involved the supply, install and commissioning of one new desiccant dehumidification unit to maintain conditions within the space of 20oC +/- 2OC and 50%RH +/- 5% RH). The works involved minor new ductwork to be cut into the existing security vault return air, new circuit breaker to be fitted to existing switchboards and connecting and commissioning of new BMS connects to the base building system. The works were
roughed in, in readiness for single cut over which was completed with the four hour shutdown window.
This project was another example of Ryan Wilks innovation by offering our clients an alternate option, completing critical cut over’s within tight time restraints and completing the works on time, on budget and to the satisfaction of our client.
Contact us
Air and Aqua Tech Australia
Location: Cromer, NSW 2099
Phone: 1300 002 228
Email: info@aaatec.com.au
For expert advice on humidity control solutions, desiccant dehumidifiers, and air handling systems, contact our team today. We specialize in customized solutions for various industries, ensuring optimal air quality, preservation, and energy efficiency.
Frequently Asked Questions (FAQ)
Q: What is desiccant dehumidification, and how does it work?
A: Desiccant dehumidification uses a moisture-absorbing rotor to remove humidity from the air. Unlike refrigerant dehumidifiers, it excels in low-temperature environments and can achieve ultra-low humidity levels.
Q: Why is humidity control important for archives and museums?
A: Controlled humidity prevents mold growth, paper deterioration, and corrosion, ensuring the longevity of books, artwork, and historical documents.
Q: How can a rental dehumidifier benefit my project?
A: Renting a dehumidifier is ideal for temporary needs, such as surface preparation, water damage restoration, and seasonal humidity control, without long-term investment.
Q: What industries benefit from DST desiccant dehumidifiers?
A: Industries such as defence, aerospace, pharmaceuticals, food storage, construction, and archival preservation rely on desiccant dehumidification for optimal climate control.
Q: How do I determine the right dehumidifier for my needs?
A: Our experts assess your space, climate conditions, and application to recommend the most efficient dehumidification solution. Contact us for a consultation.