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Air drainage - Technical solutions

Technical solutions

Air drainage

Excess moisture is a major cause of damage and destruction of buildings, especially in the Russian regions. Soaked wall under the action of low temperatures freeze, as a result masonry cracked, and it leads to premature failure of buildings and structures damaged. Not so bleak, but, nevertheless, significant effects of excessive moisture during storage of various materials and products. Humidity fluctuations adversely affect the properties of materials. Just a few examples of these symptoms:

-rusted metal products and structures

-corroded switches and contacts

-low resistivity of insulating materials

-packed powder and sugar

-mold on textiles and furs

-softened and broken cardboard boxes

-discoloration and stains on the packaging and finished products

In addition to solving these problems with the aid of effective methods of drying, you can:

maintain the strength of load-bearing structures of various facilities, including swimming pools, ice arenas, waterworks

protect from fogging windows and glass ceilings in the office and apartment buildings

improve the quality of finishing works in the repair of apartments due to dry without thermal strains used covers the walls, floor and ceiling

reverse the effects of floods, dry new construction projects

remove moisture from the musical instruments, lenses, cameras and movie cameras, carpets, inside closets and bookcases in the rainy season

increase the duration of storage of hygroscopic materials: medicines, detergents, building materials and other bulk products

maintain a low level of humidity in the production of food and wood, rubber and plastics, with dressing of fur skins

clothing store presentation and packaging

reduce the growth of bacteria, etc.

There are three main methods of drying air inside buildings

Assimilation. The method is based on the physical ability of the warm air to hold more water vapor than cold air. It is realized by means of ventilation with preheating of fresh air.

This method, in some cases (pools, cellars, warehouses, plating shops, etc.) is not effective for two reasons:

Absorption capacity of water vapor the air is limited and variable, being dependent on the time of year, temperature and absolute humidity of the air.

Method under consideration is characterized by high energy consumption due to the presence of irrecoverable losses explicit (consumed for heating supply air) and latent heat (contained in the removed water vapor from the air.) In this case, the hidden part of the heat (enthalpy), to determine the heat of vaporization of water is a significant part of common losses. Each kilogram of moisture lost 580 kcal (2.4 MJ).

Adsorption. This method is based on the sorption properties of some solid matter - sorbents. Having porous structure sorbents extract water vapor from the air. As the moisture saturated sorbent drying efficiency is reduced. Therefore, the sorbent must be periodically regenerated, that is, evaporate the moisture out by blowing a stream of hot air.

Despite the increased power consumption due to the presence of irrecoverable losses of sensible and latent heat, this method is more economical. Unlike assimilation is heated relatively small amount of air in the regenerating arm (ca. 25-30% of the air circulating in the main loop) to a much higher temperature (about 1 50 ° C). The disadvantage of the method is limited life of the sorbent, especially in the case of lithium, subject washout at a deviation from the nominal process operating conditions. More practical is the use of silica gel on glass fiber media.

Condensation. This method is based on the principle of condensation of water vapor contained in the air, when cooled below its dew point.

In condensing dehumidifiers with increasing temperature increases Capacity, 1 kW of energy consumed. In adsorption dryers, this dependence is negative and less pronounced. Furthermore, the efficiency condensing dehumidifiers decreases sharply with decreasing relative humidity, while the adsorption dryers in this relationship is much weaker. As a result, one can clearly identify the primary use of each of the compared types of dehumidifiers.

From an economic point of view, the condensation method is more efficient than the sorption at high temperature and relative humidity. However, sorption dehumidifiers can maintain extremely low relative humidity, up to 2% at temperatures up to -20 C.

Application of adsorption dryers is justified on ice, dairy, in wine and beer cellars, cooling tunnels, freezers, storages etc.


In the swimming pool, where, according to current regulations the water temperature should be at least 26 C and the air temperature must exceed it by 1 -2 C, unconditional advantages do condensing dryers. A similar situation occurs when drying lumber, holding cosmetic repair facilities, museums, auditoriums, boiler rooms, laundry rooms and a number of other sites of this kind.

LEADER-S Ltd.

Samara, Avrora st. 114A

tel: (846) 266 66 62

e-mail:illarionov@leader-cool.ru

Objects:

Fur farming "New Fur"


Tver, 

Tver region

JSC "Volsk solod"


Saratov , 

Saratov region

JSC "Modern Building technologies"


Samara, 

Samara region

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