In the first part of the article, we discussed how different designs impact the efficiency of vacuum furnaces in respect to their heating energy requirements.
Even though the energy used for heating undoubtedly represents the main energy consumption during vacuum heat treatments, several auxiliary systems can be present on vacuum furnaces (or in the plant housing the furnace); just think of the water-cooling system, the gas quenching system and, clearly, vacuum pumps.
Those auxiliary systems are essential to ensure proper functioning of a vacuum furnace, however, they can generate altogether a significant energy consumption source, especially when continuous operation is required.
Vacuum pumps are the components that allow a sealed, leak tight furnace to reach the desired vacuum level before starting the heat treatment.
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