دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

the amount of heat input required to raise the temperature of one pound of water by 1oF at water’s maximum density at 39oF. It is approximately equal to 1 kilojoule.

n: a measure of heat energy equivalent to the amount of heat needed to raise 1 pound of water 1ﾰF at or near its point of maximum density (39.1ﾰF). Equivalent to 0.252 kilogram- calorie or 1,055 joules.

British Thermal Unit.

n: a unit of measure of twisting force, or torque. The amount of energy required to move 1 pound 1 foot vertically. The metric equivalent is the centimetrekilogram. or, in SI units, the joule.

gigajoule;1,000,000,000 joules.

n: the number of kilojoules (Btu s) evolved by the complete combustion, at constant pressure, of 1 standard cubic metre of gas, with all of the water formed by the comoostion reaction being condensed to the liquid state.

n: 1. a gas whose molecules are infinitely small and exert no force on each other. 2. a gas that obeys Boyles law and Joules law. Also called a perfect gas.

a theoretical gas that perfectly obeys PV=RT/m, where V is the specific volume, T is the absolute temperature, R is the universal gas constant, and m is the molecular weight.

sym: joule.

productivity index.

n: (J) the unit used to measure heat, work, and energy in the metric system. It is the amount of energy required to move an object of I kilogram mass to a height of I metre. Also called a newton-metre.

n: the change in gas temperature that occurs when the gas is expanded adiabatically from a higher pressure to a lower pressure. The effect for most gases, except hydrogen and helium, is a cooling of the gas.