You decide to design a heating element using a piece of polished copper wire, 10mm in diameter with an emissivity of 0.08. it will maintain a constant surface temperature of 325°c when immersed inwater.
a. how did we know to apply film boiling to this scenario? (hint–look at the boiling curve.)
b. what is the rate of heat transfer from the wire to the water per unit length ofwire
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hey brainly experts user ur answer below
The working of heating elements is based on heating effect of electric current. When a current is passed through a resistance, it produces the heat.
The required properties in material used for heating elements-
High melting point.High tensile strength.High resistivity.Low temperature coefficient of resistance.High ductility to draw the metal or alloy in the form of wire.
Mostly, Nichrome wire is used as a heating element because it is very stable, even at high temperatures. Unlike other metals, it does not melt even when large amounts of heat is passed.
The working of heating elements is based on heating effect of electric current. When a current is passed through a resistance, it produces the heat.
The required properties in material used for heating elements-
High melting point.High tensile strength.High resistivity.Low temperature coefficient of resistance.High ductility to draw the metal or alloy in the form of wire.
Mostly, Nichrome wire is used as a heating element because it is very stable, even at high temperatures. Unlike other metals, it does not melt even when large amounts of heat is passed.
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