压力转换：
1 mbar =105 pa
1 dyn/cm2 (dyn/cm2) =0.1 pa
1 torr =133.322 pa
1 mmhg =133.322 pa
1 mm water column (mmh2o) =9.80665 pa
engineering atmospheric pressure =98.0665 kpa
1 kpa =0.145 lb force/inch 2 psi =0.0102 kg force /cm2 kgf /cm2 =0.0098 atmosphere
1 lb force/inch 2 (psi) =6.895 kpa =0.0703 kg force /cm2 (kg/cm2) =0.0689 bar =0.068 atmosphere
1 physical atmospheric pressure (atm) =101.325 kilopascals (kpa) =14.696 lb/in. 2 psi =1.0333 bar (bar) 1m3(gas) lpg =2.3kg (liquid) lpg
the proportion of common
natural gas 0.81kg/m3 liquefied gas 2.08kg/m3 urban gas 0.58kg/m3 air 1.24kg/m3
common volume: 1 gallon (gal) =3.785 liters (1)
传热系数的换算
1 kcal/m2. time (kcal/m2.h) =1.16279 w/m2 (w/m2)
1 kcal/(m.. ℃) [1 kcal/(m.h. ℃)) = 1.16279 w/(m. kelvin) w/(m2. k)
1. btu/(ft2.h.)) =5.67826 watts /(m. kelvin)
1.2m. hour.℃/kcal (m2.h.℃/kcal) =0.86000 m. 2.kelvin/watt (m2.k /w)
1 kcal (m.. ℃) (kcal/(m.h. ℃)) = 1.16279 w/(m. kelvin) w/(m.k)
1 btu/(feet.. ℉) but/(ft. h. ℉) = 1.7303 w/(m. kelvin) w/(m.k)
比热转换
1 kcal/kg. ℃) kcal/(kg) ℃) = 1 / british thermal unit (pounds. ℉) btu/lb. ℉) (= 4186.8 joules/(kg. kelvin) (j/kg. (k))
热能转换
1 kcal =4186.75 joules (j) =4.2kj=0.004mj
10,000 kcal =42mj 1kg force meters (kgf.m) =9.80665 joules (j)
british thermal unit (btu) =1055.06 joules (j) 1 kwh (kw.h) =3.6×106 joules (j)
1 ft. lbf =1.35582 joules (j)
1 metric horsepower hour (hp.h) =2.64779×106 joules (j)
1 horsepower hour (ukhp.h) =2.68452×106 joules
1 joule =0.10204 kg. m =2.778×10-7 kw. h =3.777×10-7 metric horsepower hour =3.723×10-7 inch horsepower hour =2.389×10-4 kcal =9.48×10-4 btu
功率转换
1 british thermal unit/hour (btu/h) =0.293071 watts (w)
1 kg force. m /s (kgfm /s) =9.80665 w (w)
1 card/second (cal /s) =4.1868 watts (w)
1 metric horsepower (hp) =735.499 watts (w)