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Concern about humidity is one of the primary reasons why wine experts such as Tom Stevenson recommend that wine should not be kept in a refrigerator since the refrigeration process often includes dehumidifying, which can quickly dry out corks. Some wine experts debate the importance of humidity for proper wine storage.
Wine cellar in Chvalovice, Czechia. A wine cellar is a storage room for wine in bottles or barrels, or more rarely in carboys, amphorae, or plastic containers.In an active wine cellar, important factors such as temperature and humidity are maintained by a climate control system.
Once bottled, a wine may be exposed to extremes of temperature and humidity, as well as violent movement during transportation and storage. These may cause cloudiness, sedimentation and/or the formation of tartrate crystals; more seriously, they may also cause spoilage or the production of carbonic gas.
For example, in the range of normal temperatures, air at 68 °F (20 °C) and 50% relative humidity will become saturated if cooled to 50 °F (10 °C), its dew point, and 41 °F (5 °C) air at 80% relative humidity warmed to 68 °F (20 °C) will have a relative humidity of only 29% and feel dry.
Thermodynamic diagrams are diagrams used to represent the thermodynamic states of a material (typically fluid) and the consequences of manipulating this material. For instance, a temperature– entropy diagram ( T–s diagram ) may be used to demonstrate the behavior of a fluid as it is changed by a compressor.
In this example the humidity ratio is 0.0126 kg water per kg dry air. Determining the effect of temperature change on relative humidity: For air of a fixed water composition or moisture ratio, find the starting relative humidity from the intersection of the wet and dry bulb temperature lines. Using the conditions from the previous example, the ...
The wine transferred from the second barrel has an average age of 2.5 years (at the end of year 2, after barrel transfers, it was half 2-year old wine, half 1-year old wine, for an average age of 1.5 years; at the end of year 3, before barrel transfers, it will have aged another year for an average age of 2.5 years).
Wine is a complex mixture of chemical compounds in a hydro-alcoholic solution with a pH around 4. The chemistry of wine and its resultant quality depend on achieving a balance between three aspects of the berries used to make the wine: their sugar content, acidity and the presence of secondary compounds.