Airtight and constant humidity (low oxygen) displaying warehouse
Customer demand
Collections can be viewed without entering the warehouse
The perfect air tightness of the warehouse should ensure a stable humidity fluctuation
Make sure the mould, oxidation, hydrolyzation and degradation won’t happen in silk fabrics
Realizing the displaying and preventive conservation of cultural relics
Solution
Setting up an airtight glass warehouse in the present warehouse
Equipped with constant humidity, air cleaning and low oxygen module
Equipment and devices
Airtight displaying warehouse, air compressor, nitrogen generator and controller, humidifier, oxygen generator, safety monitor and controller.
Main indicators
Volume: 210m3
Oxygen concentration: 1%~21%
Humidity: 20%~60%RH（20℃）
Statistics
The total volume of the warehouse is 210m3 and the air change rate reaches 0.009d-1. Daily oxygen fluctuation is 0.16% and humidity remains stable. After cutting off the power for two weeks, the outside humidity fluctuation is 16.7%RH, and the inside daily humidity fluctuation is ≤2.5%RH.
Cultural relics humidity controlled drying and dehydration system
Customer demand
The impressive need to protect the Ming dynasty coffin, which is seriously affected by the environmental deterioration
Create an environment that is similar to the buried condition to avoid cracking, deformation and mould and insect infection
Create a “controlled humidity, clean and stable” environment
Try to solve the problem of non-waterlogged lacquered wood protection in Northern China
Solution
A 79m3 airtight glass warehouse in the present warehouse could avoid the waterlogged status of the wood collection.
In order to avoid temperature changing or internal humidity saturation, condensation water drops on the cultural relics, and the ceiling of the warehouse is designed with a slope which can effectively mitigate the condensation water gathering.
Equipped with a module of parameter monitor, air cleaning, humidity control, mould prevention and bacteria inhibition, and remote control.
Equipment and devices
Humidity control device, air-tight display warehouse
Main indicators
Humidity: 95%RH
Humidity fluctuation:±5%RH
Air cleaning and ventilation function
Humidity setting, automatic monitor, display and memory of relevant data
Automatic alarm
Statistics
Over the past four years, the relative humidity of the warehouse has been reduced from 95% to 70%, and the daily humidity fluctuation is ≤3%. As the lacquered coffin gradually dehydrated, the painting and structure of the coffin are well preserved.
According to the test and statistics, the air exchange rate stood at 0.03d-1, which is superior to the standard of T/WWXT 0029-2018《The standard of controlled atmosphere warehouse》.
