British thermal unit


Also found in: Dictionary, Thesaurus, Medical, Legal, Financial, Acronyms, Wikipedia.

British thermal unit,

abbr. Btu, unit for measuring heat quantity in the customary system of English units of measurementEnglish units of measurement,
principal system of weights and measures used in a few nations, the only major industrial one being the United States. It actually consists of two related systems—the U.S.
..... Click the link for more information.
, equal to the amount of heat required to raise the temperature of one pound of water at its maximum density [which occurs at a temperature of 39.1 degrees Fahrenheit (°F;) ] by 1°F;. The Btu may also be defined for the temperature difference between 59°F; and 60°F;. One Btu is approximately equivalent to the following: 251.9 calories; 778.26 foot-pounds; 1055 joules; 107.5 kilogram-meters; 0.0002928 kilowatt-hours. A pound (0.454 kilogram) of good coal when burned should yield 14,000 to 15,000 Btu; a pound of gasoline or other fuel oil, approximately 19,000 Btu.

British thermal unit

(BTU)
The amount of heat required to raise one pound of water 1 degree Fahrenheit in temperature—about the heat content of one wooden kitchen match.

British thermal unit

[′brid·ish ′thər·məl ‚yü·nət]
(thermodynamics)
Abbreviated Btu.
A unit of heat energy equal to the heat needed to raise the temperature of 1 pound of air-free water from 60° to 61°F at a constant pressure of 1 standard atmosphere; it is found experimentally to be equal to 1054.5 joules. Also known as sixty degrees Fahrenheit British thermal unit (Btu60/61).
A unit of heat energy that is equal to 1/180 of the heat needed to raise 1 pound of air-free water from 32°F (0°C) to 212°F (100°C) at a constant pressure of 1 standard atmosphere; it is found experimentally to be equal to 1055.79 joules. Also known as mean British thermal unit (Btumean).
A unit of heat energy whose magnitude is such that 1 British thermal unit per pound equals 2326 joules per kilogram; it is equal to exactly 1055.05585262 joules. Also known as international table British thermal unit (BtuIT).

British thermal unit

The amount of heat required to raise the temperature of 1 pound of water by 1 degree Fahrenheit. Abbr. Btu.
References in periodicals archive ?
13 trillion British thermal units of LNG a year cover about 40 per cent of Jordan s annual electricity generation needs
2]) x Temperature degrees Fahrenheit ([degrees] F) x Energy British thermal units (Btu) x calories (cal) x Kilowatthours (kWh) x Conversion Type of Unit U.
6 trillion British Thermal Units (BTUs) of natural gas each year, the amount of gas that could be used to provide residential electricity to 209,000 people in Oman.
US natural-gas prices have for months been below $4 per million British thermal units, down from nearly $14 per million British thermal units in July 2008.
34 per million metric British thermal units under the terms of a tender floated in 2002-2003.
The fuel cube, a block measuring roughly 1 inch by 2 inches, is marketed by Balcones as burning cleaner than coal at a comparable British thermal units (BTU) output, but priced more comparably to wood.
2]) x Temperature degrees Fahrenheit x ([degrees] F) Energy British thermal units (Btu) x calories (cal) x Kilowatthours (kWh) x Conversion Type of Unit U.
The heat value of LFG ranges from 400 to 600 British thermal units (Btu) per cubic foot and can burn in virtually any application with minor adjustments to air/fuel ratios.
On November 25, ECC approved the reduction in gas prices for all industries by Rs 200 per million British Thermal units (mmbtu) from Rs 600 mmbtu to Rs 400 mmbtu.
25 per million metric British thermal units (mmBtu), Dow Jones has reported, citing a senior company executive.
352 a million British thermal units on the New York Mercantile Exchange.

Full browser ?