British thermal unit

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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.
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, 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 ?
8 billion British thermal units, will arrive at Duke Energy's facility in January.
Through a swap arrangement, Premier will deliver up to an additional 40 billion British thermal units per day from its operated Natuna Sea Block offshore Indonesia to the domestic markets.
9 trillion British thermal units (TBtu) during the period associated with this quarterly cash distribution compared to 3.
The heat is measured in British thermal units (Btu), the electricity in kilowatt-hours.
One of the 23 ships in NLNG's fleet, LNG Lokoja, that has a 148,471 cubic metre capacity, loaded the shipment and started sailing from Bonny Island Terminal in Rivers State on January 7, with 47,778,900 million British Thermal Units (MMbtus) of LNG.
The government has agreed to raise the GIDS on fertilizer from Rs 197 per Million British Thermal units (MMBTU) to Rs 300 per MMBTU and from Rs 50 per MMBTU to Rs 100 for industrial units.
A therm is measurement of heat equal to 100,000 British thermal units.
In the existing economic environment GAIL cannot find customers for gas even at around $15 per million metric British thermal units (mmBtu), as against previous sales at $20 per mmBtu.
05 per million British thermal units (MMBtu) of natural gas, adjusted for geographic and quality differences.
In India, the landed price of the gas will be close to $12 per million metric British thermal units (mmBtu).
NWP) today filed an amended application with the Federal Energy Regulatory Commission (FERC) requesting certificate authorization to expand its mainline natural gas transmission system by 62,175 million British Thermal Units per day (MMBtu/d).

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