Electric Resistance Heating Efficiency

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 efficiency.

A heat pump powered by electricity and not gas would also qualify as electric heat. The heating power per unit area shows the heating capability of the self heating concrete. See our video explanation of how heat pumps work for greater detail. Electric current is passed through a targeted soil volume between subsurface electrode elements.

This method of heating has wide applica tions such as heat treatment of metals annealing harden ing etc drying and baking of potteries stoving of enameled ware and com mercial and domes tic cooking. Same heating efficiency have all other completely in door devices. The electric furnace uses electrical resistance to generate warm air which it then forces through a duct system throughout the house via a fan. 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.

Every kilowatt hour of electricity in turns into one kilowatt hour of heat out. That sounds pretty good doesn t it. Types of electric resistance heaters. Let me give you two examples.

The heating power per unit area attained by the steel fiber concrete was 750 w m 2 much higher than 340 w m 2 for a metal wire with the same resistance note. This is because the upfront cost of the electric baseboard units is so cheap compared to other heating systems. Electric resistance heating is 100 energy efficient in the sense that all the incoming electric energy is converted to heat. An electric furnace or an electric boiler.

Electrical resistance heating erh is an intensive in situ environmental remediation method that uses the flow of alternating current electricity to heat soil and groundwater and evaporate contaminants. The resistance to electrical flow that exists in the soil causes the formation of heat. There are two main types of central electric heating systems. However there is a better way to heat.

However most electricity is produced from coal gas or oil generators that convert only about 30 of the fuel s energy into electricity. You can turn electricity into heat at an efficiency of 100. Resistance baseboard electric heat is a very common and tempting choice for people who need to build cheaply or to add a little heat to a newly finished or remodeled room. Heating with a tv set is as efficient as an electric heater.

The efficiency is 100 which is considered a poor heating efficiency. Tem perature up to about 1 000 c can be ob tained in ovens em ploying wire resistances for heating elements. The truth however is that electric resistance heat toasters baseboard heaters and the supplemental heat in many heat pumps is about the least efficient way to get heat. This is the one exception to the rule of equal efficiency as it is not electric resistance heat but electricity is powering a condenser and a fan.