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Electromagnetic Effects and Accurate Wall-temperature Measurement Method Under Directly Electric Heating Mode by Xianliang Lei; Yunfan Liu; Shuhan Liu; Lingtong Gou; Yusheng Li is a Engineering article available to read on EtoBox.

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By directly imposed electrical energy on metal materials with low voltage but high current to generate Joule heat is an effective energy conversion method. The corresponding temperature will quickly reach the predetermined value. It is also an effective way to achieve homogeneous heating or local non-uniform heating in the heterogeneous conductive elements, thus directly electric heating is widely used in scientific experiments and industrial practices. However, direct electrical heating method may effect by electromagnetic effect (skin effect or proximity effect) and interfere on the sensor, results in inconsistent temperature distribution or inaccurate temperature, even under the condition with power frequency (f = 50 Hz or 60 Hz). In the present paper, a comparative experimental investigation on temperature distribution of multiple parallel blocks at steady and transient process under DC and AC heating mode have been measured by infrared camera and thermocouples. It is found that the temperature measured by AC heating is always lower than that measured by DC heating under the same apparent power applied effected by electromagnetic effect. Three different sensor installations use

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Author

Xianliang Lei; Yunfan Liu; Shuhan Liu; Lingtong Gou; Yusheng Li

Publisher

Elsevier BV

Published

2023

Language

EN

Field

Engineering (Physical Sciences)