Electric Resistance Heating Efficiency

There are two main types of central electric heating systems.

Electric resistance heating efficiency.

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. Every kilowatt hour of electricity in turns into one kilowatt hour of heat out. Same heating efficiency have all other completely in door devices. A heat pump powered by electricity and not gas would also qualify as electric heat.

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. The heating power per unit area shows the heating capability of the self heating concrete. Tem perature up to about 1 000 c can be ob tained in ovens em ploying wire resistances for heating elements. This is because the upfront cost of the electric baseboard units is so cheap compared to other heating systems.

Heating with a tv set is as efficient as an electric heater. That sounds pretty good doesn t it. See our video explanation of how heat pumps work for greater detail. Resistance heating is based upon the i2r effect.

The electric furnace uses electrical resistance to generate warm air which it then forces through a duct system throughout the house via a fan. The resistance to electrical flow that exists in the soil causes the formation of heat. 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. 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.

The efficiency is 100 which is considered a poor heating efficiency. You can turn electricity into heat at an efficiency of 100. Electric resistance heating is 100 energy efficient in the sense that all the incoming electric energy is converted 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.

It is 100 because all light motion etc produced by the heater at some point becomes dissipated to heat. However there is a better way to 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. Let me give you two examples.

An electric furnace or an electric boiler. Types of electric resistance heaters. 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. 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.