Research object of energy efficiency evaluation method for electric heating elements used in intelligent household appliances

- Aug 19, 2020-

Research object of energy efficiency evaluation method for electric heating elements used in intelligent household appliances:


Research scope: the electric heating element generally refers to the components that convert electric energy into heat energy through the resistance heat principle. It is widely used in all kinds of intelligent home appliances. It is the most basic implementation component of intelligent home appliances in modern society, and the market demand is huge.


In theory, the electrothermal conversion efficiency of resistance heat elements can approach 100%, and the resistance heat products on the market can generally reach more than 90%. When the resistance thermal element works, the electric energy is converted into heat energy except for the potential energy and chemical energy of the element. The ratio of this part of heat energy to electric energy consumption is called heat exchange efficiency.

For the heat transfer process, the quantity of heat transferred remains unchanged, but the quality of heat changes. The decrease of mass in the process of heat transfer is due to the existence of heat dissipation. But even if most of the electricity is converted into heat, it can't be fully utilized. It is of social significance to study the proportion of the energy that can ultimately act on the heated object.

1

The research objects of energy efficiency evaluation methods for electric heating elements are as follows:


1) The electrothermal conversion efficiency of resistance thermal element;


2) Heat transfer efficiency;


3) Applicability of components (effective utilization of heat energy).


The goal of the research results is to reduce the thermal resistance, improve the heat transfer coefficient and heating rate, reduce the heat lag, improve the heat exchange rate, and adjust the appropriate heat radiation transfer distance and applicable value.