Electric Resistance Heating Calculations

Joule heating also known as resistive resistance or ohmic heating is the process by which the passage of an electric current through a conductor produces heat.

Electric resistance heating calculations.

This resistive heating is the result of friction as created by microscopic phenomena such as retarding forces and collisions involving the charge carriers usually electrons. Specific thermal resistance or thermal resistivity r. In formal terminology the heat corresponds to the work done by the charge. Nichrome is an alloy of nickel and chromium.

Nichrome is wound in coils to a certain electrical resistance and current is passed through it to produce heat. The power p in watts w is equal to the voltage v in volts v times the current i in amps a. Room heaters can consist of electric baseboard heaters electric wall heaters electric radiant heat or electric space heaters it is also possible to use electric thermal storage systems to avoid heating during times of peak power demand. Electric resistance heat can be supplied by centralized forced air electric furnaces or by heaters in each room.

Joule s first law also known as the joule lenz law states that the power of heating generated by an electrical conductor is proportional to the product of its resistance and the square of the current. Heating element design calculations. This resistance converts the electrical energy into heat which is. The voltage v in volts v is equal to the current i in amps a times the resistance r in ohms ω.

Type a and type c are the common types of nicr coils. For example a characteristic of a heat sink. Thermal resistance is a heat property and a measurement of a temperature difference by which an object or material resists a heat flow thermal resistance is the reciprocal of thermal conductance. Whenever an electric current flows through a material that has some resistance i e anything but a superconductor it creates heat.

We are open service tech support parts fast lead times from 6 local plants. V v i a r ω. Installing electric baseboard heating is often the easiest and most effective way to add heating to a room addition or when you are converting an unheated space such as an attic or basement ideally it s always best to extend existing ductwork from your central furnace air conditioning system but sometimes it s just not possible to route additional ductwork. Here is an introduction to electrical resistance of tape and wire heating elemets a calculation of element resistance and a temperature resistance table.