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Care of Tomoe Engineering Co., Ltd.
Osaki Bright Core
5-15, Kitashinagawa 5-chome,
Shinagawa-ku, Tokyo 141-0001

電話番号: 0081-3-3442-5142

Surface Area Loading

Surface Area Loading

It is possible ~ design an element in a variety of sizes all of which would in theory give the desired wattage load or power density dissipated per unit area. However, it is essential that the load on the surface of the element is not ~o high as the transfer of heat by conduction, convection or radiation from the element may not be rapid enough ~ prevent it over-heating and failing prematurely.

The suggested surface loading range for the type of appliance and element are shown below – but this may need ~ be lower for an element working with more frequent operating cycles, or at nearly its maximum operating temperature, or in harsh atmospheres.

Appliance 素子 タイプ Suggested Surface Loading
Range (W/cm2)
Fire Spiral 素子 in Free 空気 4.5 – 6.0
Fire Pencil Bar 6.0 – 9.5
Band Heater Mica-Wound 素子 4.0 – 5.5
Toaster Mica-Wound 素子 3.0 – 4.0
Convec~r Spiral 素子 3.5 – 4.5
S~rage Heater Spiral 素子 1.5 – 2.5
Fan Heater Spiral 素子 9.0 – 15.0
Oven 素子 Tubular
Sheathed 素子
8.0 – 12.0
Grill 素子 15.0 – 20.0
Hotplate 17.0 – 22.0
Water Immersion Heater 25.0 – 35.0
Kettle 素子 35.0 – 50.0

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