Reference
Unit Chart
Abbreviation |
Unit |
Measure of |
Value |
API gravity | unitless, but referred to in degrees | petroleum |
<10 API gravity degrees - denser than water >10 API gravity degrees - less dense than water |
cf | cubic foot | volume |
28.31684 liters 1 foot3 |
ha | hectare | area | 10,000 meters 2 |
HHV | higher heating value | energy per unit mass | gross calorific value |
J | Joule | energy | 1 Newton•meter |
LHV | lower heating value | energy per unit mass | net calorific value (subtracts energy used to vaporize water in substance) |
m | meter | length | SI base unit |
mi | mile | length | 1,609.344 meters |
mya | million years ago | time | 1 million years ago |
P | Poise | viscosity | 0.1 Pascal•second 5,280 feet |
Pa | Pascal | pressure | 1 Newton/meter 2 |
ppm | parts per million | volume concentration | 10 -6 |
W | Watt | power | 1 Newton•meter/second |
Wh | Watt hour | energy | Watt•hour |
t | tonne (metric tonne) | mass | 1,000 kilograms |
Metric Prefixes
Abbreviation |
prefix |
Value |
c | centi | 10-2 |
G | giga | 109 |
k | kilo | 103 |
M | mega | 106 |
Acronyms
CCS - Carbon Capture and Sequestration
CO2e - carbon dioxide equivalent
DOE - US Department of Energy
EIA - Energy Information Administration
EOR - Enhanced Oil Recovery
EPA - Environmental Protection Agency
ETS - Emissions Trading System
EU - European Union
GDP - Gross Domestic Product
HRSG - Heat Recovery Steam Generator
IEA - International Energy Agency
IGCC - Integrated Gasification Combined Cycle
IPCC - Intergovernmental Panel on Climate Change
OECD - Organization for Economic Cooperation and Development
R&D - Research & Development
UNEP - United Nation Environment Programme