What is oversaturated steam


 

This page shows you some terms from ventilation technology

1. Explanation of terms for humidification and dehumidification
2. To the steam generator product pages
3. FAQ humidification


1. Explanation of terms

A B C D E F G H I J K L M O P Q R S T U V W X Y Z

  • A.
    Absolute humidity
    is the mass of water vapor x contained in 1 kg of dry air; the result is always:
    (1 + x) kg air / water vapor mixture.
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    Adiabatic humidification
    arises when the air is humidified by atomizing humidifiers or atomizing systems. These devices produce aerosols that require energy to evaporate. They extract this energy from the surrounding air in the form of heat. Therefore, the adiabatic humidification has an additional cooling effect.
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    Aerosols
    are gases in which solid (smoke) or liquid (mist) substances float in the form of small particles distributed like a mist. In air humidification, aerosols are the finest water droplets with a size of approx. 1-20 ยต. They are generated by atomizing humidifiers and released into the room air. Humidification with aerosols is always adiabatic.
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  • B.
    Humidification performance

    is the amount of water vapor or aerosols that a humidifier or air humidification system usually produces within an hour. It can include can be determined with the help of the h, x diagram.
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  • C.
    Character weakness, currently none with C found
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  • D.
    steam

    is water in a gaseous state. One distinguishes Saturated steam, superheated steam, and unsaturated steam.
    - Saturated steam
    is saturated steam, d. H. Vapor that cannot absorb any more liquid. This steam is still in direct contact with water.
    - Superheated steam
    arises from saturated steam, which is further heated at constant pressure. Superheated steam is no longer saturated.
    - Unsaturated steam
    occurs when saturated steam is overheated or when the volume of saturated steam is increased at constant temperature.
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    Steam humidification

    Here water is heated and the air is humidified with the resulting pure water vapor
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    The density of the air

    changes with their moisture content.
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    Pressurized steam humidifier
    here the humidifier is individually connected to existing steam networks. The resulting dry steam enables the shortest possible humidification distances
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  • E.
  • Electrode steam humidifier
    are suitable for operation with conductive water (e.g. tap water). Electrodes are placed in a special steam cylinder. If water is let in, the electrical circuit between the electrodes closes and the water is heated: pure, odorless water vapor is produced.
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  • F.
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  • G
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  • H
    Radiator steam humidifier

    work according to the immersion heater principle. Heating rods in the steam cylinder heat the water. This type of humidification is therefore suitable for all water qualities, with fully demineralized feed water keeping the maintenance effort to a minimum.
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    h, x diagram (according to Mollier)

    is a psychrometric diagram, i.e. a diagram for steam / air mixtures, which provides information about the different air conditions, depending on air temperature, air density, absolute humidity and specific enthalpy.
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  • K
    condensate

    occurs when steam cools down. Condensate also occurs in nature when the dew point of the air is reached, i.e. H. the air cannot absorb any more water at a given temperature.
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  • L.
    air

    is a gas mixture of 78.1% nitrogen, 20.9% oxygen, 0.9 argon, 0.03% carbon dioxide and 0.01% hydrogen as well as small amounts of other gases such as B. helium, neon, krypton or xenon.
    Air that consists exclusively of the components listed above is dry air. Air in connection with water vapor is humid air. In nature only moist air occurs, regardless of whether it is "dry" desert air or London fog: this is always a mixture of air and water vapor, i.e. moist air.
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  • P
    Psychrometry

    is the doctrine of moist air (Psychros: Greek: cold, fresh). It is a branch of thermodynamics and deals with the thermodynamic properties of air.
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  • R.
    Relative humidity

    Put simply, the moisture contained in the air is related to the amount of moisture that the air could contain at the same temperature and 100% saturation with water vapor. It is usually expressed as a percentage.
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  • S.
    Window atomization
    Here, fresh water is brought onto a rotating disk, on which it is drawn into a thin film by centrifugal force. At the outer edge of the pane, the water is thrown onto special impact teeth, thereby atomizing it into aerosols and transporting it into the room.
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    Spray nozzle atomization
    Spray nozzle systems work either only with water or with water and compressed air. With single-substance nozzles, the fully demineralized humidification water is pressed into special high-pressure nozzles at a pressure of 50-60 bar and atomized there into aerosols.
    Two-substance nozzles work with compressed air and water, which means that there is no additional increase in water pressure.
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  • W.
    water
    should be of drinking water quality in untreated condition for air humidification. However, this is only a minimum requirement. A decisive criterion for electrode steam humidifiers is conductivity. In addition, however, the hardness of the water and the sulphate and chloride content also play an important role. Basically, a water analysis is necessary, which the water supplier provides free of charge.
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  • Z
    atomization
    The humidifying water is atomized into very fine droplets, the so-called aerosols. They extract the energy required to change into the gaseous state from the surrounding air in the form of heat. The atomization has a cooling (adiabatic) effect on the room temperature. The need for electrical energy is particularly low with this type of humidification.
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