 |
Natural Gas
1030 Btu / cu. ft.
1 CF = 1000 Btu = 1 MBF
1 CCF = 100 CF = 100,000 Btu = 1 Therm
1 MCF = 1000 CF = 1,000,000 Btu = 1 DecaTherm
Oil
#2 Oil...138,500 Btu / gal
#4 Oil...145,000 Btu / gal
#6 Oil...150,000 Btu / gal
Gasoline...125,000 Btu / gal
Propane...91,500 Btu / gal
1 Barrel oil = 42 gal
Electricity
3413 Btu / kWh
1 kW = 1000 W = 3413 Btu
1 HP = 0.746 kW = 2545 Btu/hr
kW = Volts x Amps x P.F/1000 (P.F = 0 to 1)
kW (3 phase) = Volts x Amps x 1.732 x P.F/1000
C.O.P = Btu cooling / Btu input
EER = Btu cooling / electric input watts
|
Heat & Power Equivalency Table
| |
Condensing Rate (GPM) |
BTUs/hour
|
Lbs/hour
|
Sq. Ft. EDR |
|
1 Boiler HP (BHP) |
.069 |
33,475 |
34.5 |
139.4 |
|
1,000 Sq. Ft.
EDR |
.50 |
240,000 |
247.3 |
1,000 |
Liquid, Volume and Weight
Equivalency Table
| |
Gallons |
Cubic Feet (ft.3) |
Cubic Inches (in.3) |
Lbs. of Water
|
|
1 Gallon |
1 |
0.1337 |
231 |
8.334 |
|
1 Cubic
Foot |
7.48 |
1 |
1728 |
62.34 |
|
1 Lb. of
Water |
0.12 |
0.01604 |
27.72 |
1 |
Pressure, Head and Vacuum
Equivalency Table
| |
Feet of head (water) |
lbs./sq. inch (PSIG) |
inches Hg (mercury) |
|
1 foot head
(water) |
1 |
0.433 |
0.883 |
|
1 lbs./sq.
inch (psig) |
2.31 |
1 |
2.04 |
|
1 inch Hg
(mercury) |
1.13 |
0.491 |
1 |
Wood
Approximate weight per standard cord (80 cubic feet
of solid wood content) of various woods (green and
air-dried to 20-percent moisture content) and
potential heat of air-dried wood
|
Type of Wood |
Pounds green1 |
Pounds
air-dried2 |
Million Btu available3 |
|
Ash |
3,940 |
3,370 |
23.6 |
|
Basswood |
3,360 |
2,100 |
14.7 |
|
Box elder |
3,500 |
2,500 |
17.5 |
|
Cottonwood |
3,920 |
2,304 |
16.1 |
|
Elm (American) |
4,293 |
2,868 |
20.1 |
|
Elm (red) |
4,480 |
3,056 |
21.4 |
|
Hackberry |
4,000 |
3,080 |
21.6 |
|
Hickory (shagbark) |
4,980 |
4,160 |
29.1 |
|
Locust (black) |
4,640 |
4,010 |
28.1 |
|
Maple (silver) |
3,783 |
2,970 |
20.8 |
|
Maple (sugar) |
4,386 |
3,577 |
25.0 |
|
Oak (red) |
4,988 |
3,609 |
25.3 |
|
Oak (white) |
4,942 |
3,863 |
27.0 |
|
Osage orange |
5,480 |
4,380 |
30.7 |
|
Pine (shortleaf) |
4,120 |
2,713 |
19.0 |
|
Red cedar |
3,260 |
2,700 |
18.9 |
|
Sycamore |
4,160 |
2,956 |
20.7 |
|
Walnut (black) |
4,640 |
3,120 |
21.8 |
1Approximate weight of standard cord (occupying 128 cubic
feet of space and containing 80 cubic feet of solid wood), for the
first two columns of figures.
2To 20 percent moisture content.
3Potential available heat from standard cord with 100
percent unit efficiency. Heat at 20 percent moisture content.
Carbon Emissions by Fuel
Electric...1 metric ton of CO2 =
(kWh * .7)/1000
Natural Gas...1 metric ton of CO2 = ((Therm/9.480) * 52)/1000
#2 Oil...1 metric ton of CO2 = (Gal * 9.84)/1000
Heavy Oils...1 metric ton of CO2 = Bbl * .43
Propane...1 metric ton of CO2 = (Gal * 12.669)/2205
Gasoline...1 metric ton of CO2 = (Gal * 19.4)/2205
Steam...1 metric ton of CO2 = Mlbs * .92356
Energy Conversion
Factors
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