Temperature
Converter

Enter a number
& click on
the "Calculate" button

°F= °C

 


Energy

(used or delivered)

Time

(This is the time over which the energy was used or delivered)

Joules


 

In the next column the power is energy/time

Watts (UNIT OF POWER)
Watt Hours Kilowatts (UNIT OF POWER)
Kilowatt Hours Horsepower (UNIT OF POWER)
BTU BTU/hr (UNIT OF POWER)
Therms tons (ODD LOOKING UNIT BUT USED FOR POWER ALSO)
This is the average power in full sunlight falling on a square foot surface, directed toward the sun, and collecting hours each day.


 


The following table illustrates how various energy storage systems would store the same amount of energy:

 

Chemical gallons of gasoline ( pounds)
pounds of natural gas ( cubic feet at psi),
pounds of hydrogen Gas ( cubic feet at psi),
a lead-acid battery weighing pounds
Mechanical (Kinetic) a high-tech flywheel weighing about pounds
a pound car traveling at miles per hour
Thermal melting a block of ice weighing pounds
heating a gallon tank of water by degrees F.
evaporating pounds (about gallons) of water
heating a pound hunk of concrete by degrees.



Note that unless a phase change is indicated, the table above does not consider latent  heat.