Required Information for Electric Heater Design
I.Electric Heater Measurement Units:
1.Power:W,Kw 1Kw=3.412BTU/hrBritish Thermal Unit/Hour=1.36(Horsepower)=864Kcal/hr
2.Weight:kg 1Kg=2.204621b(Pound)
3.Flow Velocity:m/min
4.Flow Rate:m3/min,kg/h
5.Specific Heat:Kcal/(kg℃) 1Kcal/(Kg℃)=1BTU/hr.°F=4186.8J/(Kg℃)
6.Power Density:W/cm2 1W/cm2=6.4516 W/in2
7.Pressure:Mpa
8.Thermal Conductivity:W/(m℃) 1 W/(m℃)=0.01J/(cm s℃)=0.578Btu/(ft.h.F)
9.Temperature:℃ 1F=9/5℃+32 1R=9/5℃+491.67 1K=1℃+273.15
II.Electric Heating Power Calculation:
1.The calculation of heating power includes the following three aspects:
