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Heat Loss in Medium-Frequency Melting Furnaces—A Comparison with Resistance Furnaces
Aug 08,2020
Induction Heating Melting Furnace The process has low thermal losses to the environment. Environmental thermal losses refer to the heat lost from the heating process to the surrounding environment through convection, conduction, radiation, and latent heat. Specifically, these include heat dissipation losses, radiative heat losses, heat storage losses, and heat losses due to venting.
Compared to resistance heating furnaces, induction heating melting furnaces exhibit similar heat losses during rapid thermal processing—specifically, in terms of heat loss due to radiation and convection (heat carried away by furnace gases and cooling water)—as resistance furnaces. However, induction heating furnaces have significantly lower heat losses due to thermal storage and radiative heat transfer compared to resistance furnaces. The primary difference lies in the fact that the volume-to-weight ratio of the inductor used in induction heating is vastly greater than that of the refractory lining material in resistance furnaces—nearly a hundredfold greater. Below are data comparing the surface area of the furnace chamber and the weight of refractory materials for different heating methods.
The construction of furnace bodies in resistance furnaces and fuel-fired furnaces, which involves the extensive use of refractory materials, is the primary source of significant heat storage losses. Approximately 30% of the heat is lost to heating the refractory materials used in these furnaces, whereas induction heating melting furnaces require only a small amount of refractory material. In summary, induction heating results in lower environmental heat losses, which helps improve thermal efficiency and reduce specific energy consumption. During induction heating, the main source of heat loss is the heat carried away by the cooling water, accounting for 10% to 15%.
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Kangda Electric Furnace specializes in the manufacture of the following equipment: KGCL series medium-frequency power supplies, KGPS series medium-frequency power supplies, GTR series medium-frequency induction heating furnaces...
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Address: Yuhe Industrial Park, Weicheng District, Weifang City, Shandong Province
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