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Training course on energy efficiency in SMEs - engine-sme.eu

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Electric heat<strong>in</strong>g batteries<br />

An electric-heat<strong>in</strong>g battery c<strong>on</strong>sists of a number of enclosed<br />

metal filaments or wire spirals. They create an electrical<br />

resistance which c<strong>on</strong>verts the <strong>energy</strong> to heat.<br />

The advantages of the electric battery are:<br />

• It has a small pressure drop.<br />

• It is easy to calculate the power to the battery.<br />

• It is <strong>in</strong>expensive to <strong>in</strong>stall.<br />

The ma<strong>in</strong> disadvantage is:<br />

• The metal filaments have c<strong>on</strong>siderable heat <strong>in</strong>ertia so the<br />

electric battery has to be fitted with overheat<strong>in</strong>g protecti<strong>on</strong>.<br />

www.eng<strong>in</strong>e-<strong>sme</strong>.<strong>eu</strong>

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