Energy conversion
factors table

Note about the Energy Conversion Table:

Selling to the Oil & Gas and Energy industry, requires to jump from natural gas to oil, from power to physical quantities: tons, barrels, cubic meters, from British to international standards…This table wants to be a hand while gauging a new or an old project, a prospective investment or the purchasing of a new equipment.

These factors are taken into account:

• Oil barrels, BOED, Tons of Oil, TOE / day
• LNG natural gas cubic meters, metric tons per day
• Methane normal cubic meters Ncm, standard cubic feet scf, per day or per year
• Heat equivalent Giga Joules, GJ, or British Thermal Units BTU
• Power in Mega watts, MW or British Horse Power BHP

Note the 6 categories:
Power, Heat, Flow, Volume, Weight and Oil.
They should guide you.

Example:

Read it horizontally:
1 Mw = 1 Mj/s = 0.018018 kg/s of NG = 0.2516 ncm/s = 0.937218 scf/s = 80975,67 scf/d = 0.080976 MMscfd
This is the minimum flow of NG you can use to run a 1 Mw gas turbine with 100% efficiency: i.e burning every CH4 atom of a CH4 pure NG stream.

Assumptions behind these figures:

• The first is that we choose absolute value. For Natural Gas, e.g., we choose an HHV of 55.5 Mj/Kg.
  This is theoretical. No pipeline will give you gas with such a purity. But then you can apply your corrective factors, your efficiency factors, and come to a conclusion.
• The second is that we did our bet, both in researching accurate values, and doing accurate calculations.
• The third is the basic figures I used. They are listed in the second table at bottom page.
You use this table at your own risk.
However, if you discover an error, we will be happy to know and thank you in advance.

Unit of Measure	Value	Note
ncf/nmc	35,31	-
scf/nmc	37,33	-
cal/J	4,1868	-
j/btu	1055,056	-
t/b	7,3	API 33
BHP/Kw	0,7457	-
CH4 Mol weight	16,043	g/mol
R	8,31434	j/mol/K
CH4 HHV	55,500	@ 15,4 °C MJ/kg
CH4 LHV	55,009	@ 15,4 °C MJ/kg
molar volume CH4 (cm/mol)	0,022354315	@ 0 °C , 101325 Pa
molar volume CH4 (cm/mol)	0,023593844	@ 15 °C , 101325 Pa
density kg/ncm	0,71766905	@ 0 °C , 101325 Pa
density kg/scm	0,6799655	@ 15 °C , 101325 Pa
liquid density kg/cm	422,36	@ 101325 Pa
mol/nmc	44,73409275	-
mol/scm	42,38393692	-
scm/ncm	1,05544921	measured
scm/ncm	1,057714421	pv=nrt
TOE	41,868	Gj
1 barrel	158,9873	liters
oil density	0,858	kg/liter @ 59 °F
oil density	7,335	barrels/metric ton
1 boe	5,8 * 10 ^6	Btu @ 59 °F - HHV
oil HHV	45,25	Mj/kg @59 °F
oil HHV	38,84	Mj/liter
oil LHV	42,98	Mj/kg @59 °F
oil LHV	36,89	Mj/liter

Gas properties for Natural Gas components: