The power selection of electric heaters is an important part of ensuring heating effect, system safety and economic efficiency. The following are a few key points to note when selecting the power of electric heaters:
1. Working environment and demand
Heating medium: first of all, you need to specify what kind of medium will be used to heat the electric heater, such as air, water, oil or other liquids. Specific heat capacity of different media, thermal conductivity and boiling point and other characteristics will affect the required power.
Temperature range: to determine the target temperature to be heated and the starting temperature, the temperature difference between the two is the key factor in determining the size of the required power.
Working time: the time required for heating is also an important reference for the selection of power, fast heating usually requires higher power.
2. Power calculation formula
According to the working environment and demand for electric heaters, use the corresponding formula to estimate the required power. For example, for heating liquids, can be calculated using the formula "KW = C2M3 △ T / 864 + P", where C is the specific heat capacity, M is the mass, △ T is the temperature difference, P for other heat loss.
Also need to consider the heating process may exist in the heat loss, such as container heat dissipation, medium convection, etc., to ensure that the selected power to meet the actual demand.
3. Electric heat pipe specifications and materials
According to the calculated power requirements, select the appropriate specifications of the electric heat pipe, including length, diameter, power density, etc..
Material selection is also critical, according to the corrosiveness of the heating medium, operating temperature and other factors to determine. Common materials include stainless steel, titanium alloy and so on.
4. Safety and life
Excessive power may lead to overheating, damage or even cause safety accidents, so we need to ensure that the selected power in the safe range of electric heaters.
At the same time, reasonable power selection also helps to extend the service life of the electric heating pipe and reduce maintenance costs.
5. Economy and efficiency
Under the premise of meeting the heating demand, we should try to choose moderate power, high energy efficiency ratio of electric heaters to reduce energy consumption and operating costs.
In summary, the power selection of electric heaters need to take into account the working environment, demand, formula, specifications, materials, safety life and economic efficiency and other factors.
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