Electric Resistance Heating Efficiency

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.

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. However most electricity is produced from coal gas or oil generators that convert only about 30 of the fuel s energy into electricity. 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. That sounds pretty good doesn t it.

Observed that the concrete with nickel particles has a superior self heating. 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. There are two main types of central electric heating systems. The electric furnace uses electrical resistance to generate warm air which it then forces through a duct system throughout the house via a fan.

However there is a better way to heat. The heating power per unit area shows the heating capability of the self heating concrete. A heat pump powered by electricity and not gas would also qualify as electric heat. You can turn electricity into heat at an efficiency of 100.

The efficiency is 100 which is considered a poor heating efficiency. The resistance to electrical flow that exists in the soil causes the formation of heat. An electric furnace or an electric boiler. 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 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 because the upfront cost of the electric baseboard units is so cheap compared to other heating systems. It is 100 because all light motion etc produced by the heater at some point becomes dissipated to heat. Types of electric resistance heaters.

Let me give you two examples. Tem perature up to about 1 000 c can be ob tained in ovens em ploying wire resistances for heating elements. Every kilowatt hour of electricity in turns into one kilowatt hour of heat out. Electric resistance heating is 100 energy efficient in the sense that all the incoming electric energy is converted to heat.

Same heating efficiency have all other completely in door devices. 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. Heating with a tv set is as efficient as an electric heater. Electric current is passed through a targeted soil volume between subsurface electrode elements.