British thermal unit

Học thuật
Thân thiện
Definition
  1. Noun:
    • A unit of heat measurement: The British thermal unit is a traditional unit of energy. It is defined as the amount of heat energy required to raise the temperature of one pound of water by one degree Fahrenheit at a specified condition (one atmosphere of pressure).
Usage
  • The British thermal unit is primarily used in the United States and, to a lesser extent, the United Kingdom, to quantify energy content, particularly for fuels (like natural gas), heating, and cooling systems. It is a common unit in the power, steam generation, and air conditioning industries.
  • It is often abbreviated as Btu (or BTU).
Examples
  • Noun:
    • This air conditioner has a cooling capacity of 12,000 British thermal units per hour.
    • Natural gas is typically sold by the thousand cubic feet, with its energy content measured in British thermal units.
    • One British thermal unit is approximately equal to 1,055 joules.
Advanced Usage
  • "Btu/hour (Btu/h)": A common unit of power, indicating the rate of energy transfer per hour. This is frequently used to specify the output of heaters or the cooling capacity of air conditioners.
    • The furnace has a maximum output of 80,000 Btu/h.
  • "Million British thermal units (MMBtu)": A standard unit used in larger-scale energy commerce, such as for wholesale natural gas.
    • The contract was for the delivery of 10,000 MMBtu of natural gas.
Variants and Related Words
  • Btu (BTU): The standard abbreviation for British thermal unit.
  • Therm: A unit of heat energy equal to 100,000 British thermal units, often used for natural gas billing.
  • Joule: The SI (International System of Units) unit of energy. One British thermal unit is approximately 1,055 joules.
Synonyms
  • Heat unit: A general term for a unit measuring thermal energy. (Note: "British thermal unit" is a specific type of heat unit.)
Related Phrases
  • Btu content: Refers to the amount of energy, measured in British thermal units, contained in a fuel or released during its combustion.
    • The Btu content of this coal sample is very high.
  • Btu rating: A specification for appliances indicating their energy input or output capacity in British thermal units.
    • Check the Btu rating on the space heater before you buy it.
Noun
  1. a unit of heat equal to the amount of heat required to raise one pound of water one degree Fahrenheit at one atmosphere pressure; equivalent to 251.997 calories

Từ đồng nghĩa