TECH TOOLS - Definitions

Common Abbreviations

KW = Kilowatts
Gal = Gallons of solution to be heated
in = Inches
SpH = Specific Heat of Solution (Water = 1 calorie/gram)
SpW = Specific Weight of solution (Water = 8.337 lbs/gal)
T°F = Change in temperature, degrees Fahrenheit
T°C = Change in temperature, degrees Centigrade
Min = Heatup time in minutes

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Common Equivalents

1 in = 2.54 cm= 25.4 mm = 0.083ft
1 cm = 0.3937 in = 0.0328 ft
1 in³ = 16.39 cm³
1 BTU = 0.2933 watt-hrs
1 KW-Hr = 3412 BTU

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Properties of Water

1 gallon = 231 in³ = 0.1337 ft³ = 3.785L
1 gallon = 8.337 lbs.
1 ft³ = 62.4 lbs. (at 20°C)
specific heat = 1 calorie/gram-°C (at 15°C)
specific heat = 1 BTU/lb.-°F (at 15°C)
specific weight = 8.337 lbs./gallon
heat of vaporization = 965 BTU/lb.

 

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Ohm's Laws

Volts = Amperes x Ohms Watts = Amperes x Volts Watts = (Amperes)² x Ohms Amperes = Watts / Volts Amperes/Phase = (Watts / Volts) x 0.578 (Assuming Balanced 3-Phase Load)