heat value
81face value — Face Face (f[=a]s), n. [F., from L. facies form, shape, face, perh. from facere to make (see {Fact}); or perh. orig. meaning appearance, and from a root meaning to shine, and akin to E. fancy. Cf. {Facetious}.] 1. The exterior form or appearance… …
82Threshold Limit Value — The Threshold Limit Value (TLV) of a chemical substance is a level to which it is believed a worker can be exposed day after day for a working lifetime without adverse health effects. Strictly speaking, TLV is a reserved term of the American… …
83R-value — /ahr val yooh/, n. a measure of the resistance of an insulating or building material to heat flow, expressed as R 11, R 20, and so on; the higher the number, the greater the resistance to heat flow. Cf. U value. [1945 50; R, symbol for… …
84Threshold limit value — The threshold limit value (TLV) of a chemical substance is a level to which it is believed a worker can be exposed day after day for a working lifetime without adverse health effects. Strictly speaking, TLV is a reserved term of the American… …
85U-Value — (see Coefficient of Heat Transmission) The reciprocal of R Value. The lower the number, the greater the heat transfer resistance (insulating) characteristics of the material …
86R-value — R val•ue [[t]ˈɑrˌvæl yu[/t]] n. bui a measure of the resistance of an insulating or building material to heat flow, expressed as R 11, R 20, and so on; the higher the number, the greater the resistance to heat flow Compare U value • Etymology:… …
87Orders of magnitude (specific heat capacity) — This is a table of specific heat capacities by magnitude. Unless otherwise noted, these values assume standard ambient temperature and pressure. List of orders of magnitude for specific heat capacity Factor Value J·kg−1·K−1 Item 26 94 Radon… …
88Higher Heating Value — (HHV) The maximum heating value of a fuel sample, which includes the calorific value of the fuel (bone dry) and the latent heat of vaporization of the water in the fuel. (See moisture content and net (lower) heating value, below.) …
89U-value — /yooh val yooh/, n. a measure of the flow of heat through an insulating or building material: the lower the U value, the better the insulating ability. Cf. R value. [1945 50; U, symbol for internal energy] * * * …
90U-value — U val•ue [[t]ˈyuˌvæl yu[/t]] n. bui a measure of the flow of heat through an insulating or building material: the lower the U value, the better the insulating ability Compare R value • Etymology: 1945–50; U, symbol for internal energy …
