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Equilibrium moisture content information


Equilibrium moisture content of wood versus humidity and temperature, according to the Hailwood-Horrobin equation.

The equilibrium moisture content (EMC) of a hygroscopic material surrounded at least partially by air is the moisture content at which the material is neither gaining nor losing moisture. The value of the EMC depends on the material and the relative humidity and temperature of the air with which it is in contact. The speed with which it is approached depends on the properties of the material, the surface-area-to-volume ratio of its shape, and the speed with which humidity is carried away or towards the material (e.g. diffusion in stagnant air or convection in moving air).

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Equilibrium moisture content

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The equilibrium moisture content (EMC) of a hygroscopic material surrounded at least partially by air is the moisture content at which the material is...

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Wood drying

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Wood drying (also seasoning lumber or wood seasoning) reduces the moisture content of wood before its use. When the drying is done in a kiln, the product...

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Grain drying

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storage. Moisture content in grain is related to the relative humidity and the temperature of the surrounding air. Equilibrium moisture content point is...

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Moisture meter

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substance, as physical properties are strongly affected by moisture content and high moisture content for a period of time may progressively degrade a material...

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Log house

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are part of a completed log house reach equilibrium with local conditions and have an equilibrium moisture content of between 6% and 12%, which varies by...

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List of types of equilibrium

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interdependent parts Equilibrium moisture content, the moisture content at which the wood is neither gaining nor losing moisture Equilibrium point, in mathematics...

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Acetylated wood

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exhibits a much lower equilibrium moisture content compared to natural, non-acetylated wood. The maximum equilibrium moisture content of regular wood is...

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Fibre saturation point

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it is in equilibrium with the atmospheric moisture content or relative humidity, and since this varies so does the equilibrium moisture content. Laboratory...

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Moisture sorption isotherm

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At equilibrium, the relationship between water content and equilibrium relative humidity of a material can be displayed graphically by a curve, the so-called...

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Drying

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times. The product moisture content is then constant at the "equilibrium moisture content", where it is, in practice, in equilibrium with the dehydrating...

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EMC

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United States National Centers for Environmental Prediction Equilibrium moisture content European Medical Command European Muon Collaboration, a defunct...

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Moisture analysis

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Moisture analysis covers a variety of methods for measuring the moisture content in solids, liquids, or gases. For example, moisture (usually measured...

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Hygroscopy

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condensation nuclei Critical relative humidity Efflorescent Equilibrium moisture content Hydrophile Hydrophobe Ni, Feng; Qiu, Nianxiang; Xiao, Peng; Zhang...

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Wood

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on mass at 12% moisture content and volume at the same (ρ12). This condition occurs when the wood is at equilibrium moisture content with air at about...

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Hygrometer

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Dewcell Humidistat Moisture analysis Friar of the weather Soil moisture sensor This is different from measuring the moisture content of something non-gaseous...

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Soil moisture velocity equation

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{\displaystyle z} , which is a function of time, the water content and media properties. The soil moisture velocity equation consists of two terms. The first...

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Humidity

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needed] In the Earth's atmosphere at sea level: Specific humidity (or moisture content) is the ratio of the mass of water vapor to the total mass of the air...

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Moisture advection

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Hydrostatic equilibrium approximation. And its divergence (convergence) imply net evapotranspiration (precipitation) as adding (removing) moisture from the...

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Woodturning

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the lathe. Green or wet turning – turning wood while its moisture content is above equilibrium. Often done when the wood is newly felled. May be turned...

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Isotherm

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isothermal process Moisture sorption isotherm – a curve giving the functional relationship between humidity and equilibrium water content of a material for...

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Engineered wood

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through all of them.  As the hardwood dowel dries to reach an equilibrium moisture content with the softwood lumber, it expands into the surrounding boards...

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Wood warping

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changes in moisture content. Warping can occur in wood considered "dry" (wood can take up and release moisture indefinitely) when it takes up moisture unevenly...

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Foreign grain beetle

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humidity is at least 70%, or at least 65% at 20 °C (because the equilibrium moisture content of the substrate will be similar), a condition necessary for...

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Water activity

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Thermal equilibrium must also be achieved unless the sample temperature is measured.[citation needed] Water activity is related to water content in a non-linear...

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Green woodworking

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components tighten against each other as the parts exchange moisture and approach equilibrium with the surrounding environment. The swelling of the dry...

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Soil

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within the soil. Soil water content can be measured as volume or weight. Soil moisture levels, in order of decreasing water content, are saturation, field...

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Dew point

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temperature depends on the pressure and water content of the air. When the air is cooled below the dew point, its moisture capacity is reduced and airborne water...

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Humidity indicator card

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Humidity indicators are an inexpensive way to indicate or quantify moisture content inside sealed packaging. They are available in many configurations...

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Dynamic vapor sorption

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transport properties of proton exchange membranes. Hygroscopy Moisture sorption isotherm Water content P. York, International Journal of Pharmaceutics. 14 (1983)...

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