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Heanjia Super-metals Co., Ltd.
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Heanjia Super-metals Co., Ltd. [China (Mainland)]
Business Type:Manufacturer, Trading Company
City: Beijing
Province/State: Beijing
Country/Region: China (Mainland)
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Jialiang Zhao:
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Learning Gallery
Heating Strip Calculation
We have two formulas to define the width and thickness of strip heating element:
t—thickness of strip (mm) | Kt—coefficient of thickness |
b—width of strip | Kb—coefficient of width |
P—capacity/power (W) | ω—surface area loading (W/cm2) |
U—Voltage (V) | Ct—Temperature-Resistance Factor |
Use following two formulas to calculate Kt and Kb:
n=b/t is the ratio of width and thickness So Kb=n·Kt
You can find common used figure of Kt and Kb in the following table:
n | 5 | 8 | 10 | 12 | 15 |
Kt Kb | 0.119 0.593 | 0.0886 0.708 | 0.0769 0.769 | 0.0684 0.821 | 0.0593 0.889 |
For Example:
Material: Nichrome 80/20, Ct of Nichrome 80
Power: 10KW
Voltage: 220V
Surface area loading: 1.05W/cm2
Temperature: 1100℃
According to the formula above:
b=Kb×13
According to the table, choose b/t=8:
b=0.708×13=9.20
t=9.20÷8=1.15
so the size of strip is 9.20mm×1.15mm which is not regular size,
we can change b/t to b/t=10, then:
b=0.769×13=10
t=10÷10=1
The strip size is 1mm×10mm
