Basic definitions and energy units
Эта страница на русском здесь| Energy units. | |||||
| unit | joule equivalent | other equivalent | |||
|---|---|---|---|---|---|
| joule | 1 | J | N·m | ||
| erg | 0.1 | µJ | dyne·cm | ||
| foot pound | 1.35582 | J | (approximate) | ||
| watt second | 1 | J | N·m | ||
| watt hour | 3.6 | kJ | 3600 W·s | ||
| kilowatt hour | 3.6 | MJ | 1000 W·h | ||
| thermochemical calorie | 4.184 | J | (by definition) | ||
| International Table calorie | 4.1868 | J | (by definition) | ||
| *kilocalorie* | 1000 calorie | ||||
| **thermochemical Btu** | 1.054350 | kJ | (approximate) | ||
| **International Table Btu** | 1.05505585262 | kJ | (by definition) | ||
| therm | 100,000 Btu | ||||
| ***quad*** | 1.055 | EJ | (approximate) | 1015 Btu | |
| cubic meter natural gas | 37 - 39 | MJ | (variable) | ||
| ton of oil equivalent | 41 - 45 | GJ | (variable) | ||
| ton of coal equivalent | 29.3 | GJ | (approximate) | ||
| ton of TNT | 4.184 | kJ | (by definition) | ||
| ***The kilocalorie is also known as the kilogram calorie, dietetic calorie, food calorie, and Calorie. *** Btu stands for "British thermal unit". ***Quad is the short form of "quadrillion Btu". | |||||
Common Energy Unit Conversion Factors
|
|
J |
Quad |
kcal |
mtce |
boe |
mtoe |
m3gas |
TWyr |
|
1 J = |
1 |
947.9 * 10-21 |
239 * 10-6 |
34.14 * 10-12 |
163.4 * 10-12 |
22.34 * 10-12 |
26.84 * 10-9 |
31.71 * 10-21 |
|
1 Quad = |
1055 * 1015 |
1 |
252 * 1012 |
36.02 * 106 |
172.4 * 106 |
23.57 * 106 |
28.32 * 109 |
33.45 * 10- 3 |
|
1 kcal = |
4184 |
3966 * 10-18 |
1 |
142.9 * 10-9 |
683.8 * 10-9 |
93.47 * 10-9 |
112.3 * 10-6 |
132.7 * 10-18 |
|
1 mtce = |
29.29 * 109 |
27.76 * 10-9 |
7 * 106 |
4.786 |
0.6543 |
786.1 |
928.7 * 10-12 |
1 |
|
1 boe = |
6119 * 106 |
5.8 * 10-9 |
1462 * 103 |
0.2089 |
1 |
0.1367 |
164.2 |
194 * 10-12 |
|
1 mtoe = |
44.76 * 109 |
42.43 * 10-9 |
10.7 * 106 |
1.528 |
7.315 |
1 |
1201 |
1419 * 10-12 |
|
1 m3gas = |
37.26 * 106 |
35.31 * 10-12 |
8905 |
1272 * 10-6 |
6089 * 10-6 |
832.3 * 10-6 |
1 |
1181 * 10-15 |
|
1 Twyr = |
31.54 * 1018 |
29.89 |
7537 * 1012 |
1076 * 106 |
5154 * 106 |
704.5 * 106 |
846.4 * 109 |
1 |
Notes: J = Joule; Quad = Quadrillion BTU (British thermal unit); kcal = kilogram calorie; mtce = metric ton of coal equivalent; boe = barrel of oil equivalent; mtoe = metric ton of oil equivalent; m3gas = cubic meter of natural gas; Twyr = terawatt-year