Archives storehouse temperature and humidity control method

Archives storehouse temperature and humidity control method

Abstract: the temperature and humidity control note: heating can not use fire, cooling could not dew, humidity reduction is the most important

Temperature and humidity control basic experience in warehouse site selection and construction mainly, supplemented by daily management ;

In the closed ventilation, in conjunction with other equipment supplemented;

To regulate the humidity, both temperature regulation, focus is dehumidified.

Explanation of terms and concepts

Closed ventilation and moisture absorption agent freon refrigerant physical adsorption and chemical adsorption of wet cooling principle

A closed

(a) the airtight effect : to prevent and weaken the library without the appropriate temperature and humidity on the Bank of the influence of the temperature and humidity in the library as far as possible in a relatively stable state.

(two ) sealing method

1 permanent closed underground warehouse, warehouse, long-term closure of part of doors and windows

2 temporary closed warehouse closed, sealed plastic bag sealed cabinet

Two, ventilation

(a) the role of ventilation : there are plans to base and air exchange, on the Bank of the temperature and humidity regulation, make the warehouse temperature and humidity to maintain a relatively stable state.

(two ) ventilation methods: natural ventilation, mechanical ventilation

(three ) ventilation principle

1 ventilation regulating the temperature in the library principle

T Library > library, ventilation and heating

T base < base, ventilating and cooling

2 ventilation regulating reservoir in humidity principle

Z Library > library, ventilation humidification (general use )

Z base < base, ventilation and wet ( used )

Diameter = = Z / Zb x 100% Zb proportional to t.

T base < library library with < base, to ventilation and wet;

The T Library = library with base < base, to ventilation and wet;

T base < library library with = base, to ventilation and wet;

T library library Library > < with warehouse to calculate Z, base < base, to ventilation and wet;

T Library > Library with base < base, calculating the Z, base < base, to ventilation and wet;

In three, the Treasury dehumidified by other methods

(a) moisture absorption agent, is capable of adsorbing or absorbing moisture in air material, in order to reduce the storage humidity.

1 moisture absorption principle

Physical adsorption by moisture absorption agent and water physical mixing is a chemical change takes place, such as: silica gel absorption

Chemical adsorption by moisture absorption agent and water to generate chemical reaction to absorb moisture in the air, such as: anhydrous calcium chloride

2 calcium chloride moisture absorption

CaCl2 + 2H2O CaCl2 2H2O

CaCl2 2H2O + 4 H2O CaCl2 6H2O

3 silica gel absorption of moisture

Using a large amount of micropores, the strong capillary action, so that the water vapor into the micropores and cohesion.

M SiO2, n H2O, colorless and translucent particles, no smell, no corrosion, insoluble in water, moisture absorption rate of 25 ~ 50%, water insoluble, not contaminated items.

(two ) the dehumidifier

1 dewetting principle

In the sealed storehouse, through the refrigerant Freon ( Freon) will air temperature drops to below dew point temperature, a part of the steam condensate water to wet. Isothermal reduction in indoor air of Z, reduce with purpose.

2 dewetting machine structure

Refrigeration cycle parts

Freon circulation route 7 - 6 - 5 - 2 - 7

The 2 evaporator liquid gaseous absorption evaporator and Freon - air cooling condensation, condensate water

The 6 condenser Freon gaseous liquid exothermic condenser air temperature

Air moisture circulation part

Base air circulation route 1 - 2 - 6 - 8

Base air passes through the filter by the evaporator, sudden cooling, cooling condensation condenses into water, and then by external condenser temperature centrifuge, from out of the machine.

Dewetting machine principle two use with = = Z / Z B x 100% formula, with Z, Z, B ( T) the relationship between the three.

Evaporator air Z unchanged, t and were inversely proportional to temperature were to rise to 100%, and then cooled to condensation of water.

The dehumidifier air t unchanged, Z and were proportional to air condensation, condensate water drop Z, reduce moisture.

| Updated:2011.07.14    Source:    Clicks: