Ðề: Trả lời: hoi ve cach chuyen don vi
thông thường chuẩn nhất về đơn vị người ta chỉ sử dụng Btu/h thôi, còn ngựa thì chỉ có VN dùng mà thôi, ngựa có 2 loại ngựa Mỹ và ngựa Nhật.
Nhật 1Hp=9000 Btu/h (tương đối)
Mỹ 1HP=9600 Btu/h
Chào các bạn, thấy các bạn bàn luận sôi nổi tôi xin đóng góp cái link này nếu các bạn có gì thắc mắc xin liện với tôi
http://en.wikipedia.org/wiki/British_thermal_unit . Theo phần link đó là
"Associated units
The BTU per hour (BTU/h) is the unit of power most commonly associated with the BTU. The term is sometimes shortened to BTU hour (BTU.h) but both have the same meaning.
1 watt is approximately 3.41214 BTU/h[4]
1000 BTU/h is approximately 293.071 W
1 horsepower is approximately 2,544 BTU/h
1 "ton of cooling", a common unit in North American refrigeration and air conditioning applications, is 12,000 BTU/h. It is the amount of power needed to melt one short ton of ice in 24 hours, and is approximately 3.51 kW.
1 therm is defined in the United States and European Union as 100,000 BTU—but the U.S. uses the BTU59 °F whilst the EU uses the BTUIT.
1 quad (energy) (short for quadrillion BTU) is defined as 1015 BTU, which is about one exajoule (1.055 × 1018 J). Quads are used in the United States for representing the annual energy consumption of large economies: for example, the U.S. economy used 99.75 quads/year in 2005. One quad/year is about 33.43 gigawatts.
The BTU should not be confused with the Board of Trade Unit (B.O.T.U.), which is a much larger quantity of energy (1 kW·h, or about 3412 BTU)."
