计算所需功率
Calculate the power required in Kilowatts (Kw) to maintain water temperature using the flow rate in gallons or liters per minute (gpm or lpm) and temperature change required in degrees Centigrade (ºC) or Fahrenheit (ºF).
Flow Rate (GPM)
Temperature Change Required (ºC)
Enter values >0.
Flow Rate (LPM)
Temperature Change Required (ºC)
Enter values >0.
Flow Rate (GPM)
Temperature Change Required (ºF)
Enter values >0.
Volume of water (Gal)
Temperature Change Required (ºC)
Time of Heating (Mins)
Enter values >0.
计算所需时间
Calculates the heating time in minutes (Mins) using the volume of water (Gal), the temperature change required in degrees Centigrade (ºC) or Fahrenheit (ºF), and the power available in Kilowatts (Kw).
Volume of Water (Gal)
Temperature Change Required (ºC)
Power Available (Kw)
Enter values >0.
Volume of Water (Gal)
Temperature Change Required (ºF)
Power Available (Kw)
Enter values >0.
计算所需温度
Calculate the temperature change in degrees Centigrade (ºC) using the power available in Kilowatts (Kw), the heating time in minutes (Mins), and volume of water in gallons (Gal).
Power available (Kw)
Time of heating (Mins)
Volume of Water (Gal)
Enter values >0.
References & Definitions
H2O Properties
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./gallonheat of vaporization = 965 BTU/lb.
Abbreviations
KW = Killowatts
Gal = Gallons
In = Inches
Mins = Minutes
SpH = Specific Heat of Solution
SpW = Specific Weight of solution
ΔT°F = Change in degrees Fahrenheit
ΔT°C = Change in degrees Centigrade
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
Ohm’s Laws
Volts = Amperes x Ohms
Watts = (Amperes)² x Ohms
Amperes = Watts / Volts
Amperes/Phase =(Watts / Volts) x 0.578
(Assuming Balanced 3-Phase Load)