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The psychrometric ratio is the ratio of the heat transfer coefficient to the product of mass transfer coefficient and humid heat at a wetted surface. It may be evaluated with the following equation: [6] [7] = where: = psychrometric ratio, dimensionless
Cotton bond paper can be found at most stores that sell stationery and other office products. Some cotton paper contains a watermark. It is used for banknotes in a number of countries. These banknotes are typically made from 100% cotton paper, but can also be made with a mixture of 75% or less flax. [3]
English: This psychrometric chart represents the acceptable combination of air temperature and humidity values, according to the PMV/PPD method in the ASHRAE 55-2010 Standard. The comfort zone in blue represents the 90% of acceptability, which means the conditions between -0.5 and +0.5 PMV, or PPD < 10%.
The psychrometric constant relates the partial pressure of water in air to the air temperature. This lets one interpolate actual vapor pressure from paired dry and wet thermometer bulb temperature readings. [1]
The wet-bulb temperature is the lowest temperature that may be achieved by evaporative cooling of a water-wetted, ventilated surface.. By contrast, the dew point is the temperature to which the ambient air must be cooled to reach 100% relative humidity assuming there is no further evaporation into the air; it is the temperature where condensation (dew) and clouds would form.
Nitrocellulose (also known as cellulose nitrate, flash paper, flash cotton, guncotton, pyroxylin and flash string, depending on form) is a highly flammable compound formed by nitrating cellulose through exposure to a mixture of nitric acid and sulfuric acid.
A T-shirt printed with a flocking technique (lower half). Flocking is the process of depositing many small fiber particles (called flock) onto a surface.It can also refer to the texture produced by the process, or to any material used primarily for its flocked surface.
Spinner's weasel or clock reel is a mechanical yarn-measuring device consisting of a spoked wheel with gears attached to a pointer on a marked face (which resembles a clock) and an internal mechanism that makes a "pop" sound after the desired length of yarn is measured (usually a skein). The pointer allows the spinner to see how close they are ...