1. Do energy-saving devices really save electricity?
The editor noted that experts have repeatedly reminded citizens that the "energy-saving devices" on the market are essentially just capacitors, and saving 20%-50% of electricity is simply against the common sense of physics.
According to experts, energy-saving devices do exist, but they are mostly used in industrial and other fields and are not suitable for our daily lives. This is because truly effective energy-saving devices require the support of multiple technologies, including power electronic control technology, active filtering technology, and advanced automatic intelligent control technology. Their principles are complex and not as simple as they appear.
Using commercially available energy-saving devices that claim to easily reduce your electricity bills may not only fail to save you money, but your indiscriminate use could actually increase circuit losses, turning them into power-consuming devices (with minimal energy consumption). Most energy-saving devices on the market are poorly made; aging capacitors can even explode, and short circuits in the internal wiring can cause fires!
II. What are the differences between frequency converters and energy-saving devices?
First, frequency conversion technology is only one of many energy-saving technologies. Energy-saving technologies include many technologies such as voltage regulation and current limiting, power factor compensation, phase control power regulation, frequency conversion, chopping, filtering, and energy feedback. Even for energy-saving devices that use the frequency conversion principle, the frequency converter is only one unit in the energy-saving device.
Secondly, the energy-saving device's research and development design takes into account various control requirements of the application site and has various control functions that are easy to operate on-site, such as temperature and pressure closed-loop control.
Third, in many industrial sites, directly wiring and installing frequency converters does not comply with electrical specifications and can easily lead to various safety accidents. Installing a complete set of energy-saving devices can reduce the occurrence of accidents.
Fourth, the energy-saving device's research and development design fully considers the safety protection of the built-in frequency converter, setting up lightning protection circuits, overvoltage protection circuits, and fault alarm functions to minimize the risk of accidental damage to the frequency converter itself.
Fifth, based on the actual needs of the production site, the energy-saving device is generally equipped with a high-performance bypass system, which can still ensure the smooth operation of on-site production in the event of an unexpected failure of the speed control unit.
Sixth, as we all know, frequency converters generate certain harmonics during operation. In many production sites, a large amount of harmonic interference often causes equipment malfunctions or even damage. When developing and designing energy-saving devices, large energy-saving companies usually install harmonic filtering devices inside the energy-saving devices to filter out most of the harmonics on-site, which is crucial for the safe production of customers.
III. Policy Support for Energy-Saving Devices
The energy-saving device employs high-voltage filtering and energy absorption technology to automatically absorb the energy from the reverse electromotive force of high-voltage power equipment and continuously feed it back to the load, saving the electrical energy that the equipment draws from the high-voltage power grid. Furthermore, by utilizing internationally advanced high-voltage parameter optimization technology, sine wave tracking technology, nanotechnology, and components, it suppresses and reduces the generation of inrush currents, transients, and high-order harmonics in the power supply lines, purifying the power supply, improving the power quality of the high-voltage power grid, significantly reducing line losses and copper and iron losses in power equipment, and extending the service life and operating efficiency of high-voltage electrical equipment. During use, it saves energy and significantly reduces equipment operating costs.
With the development of technology and the rapid growth of the social economy, various electrical appliances have entered thousands of households. As a result, household electricity load is constantly increasing, and electricity bills, as well as the costs of repairing and replacing household appliances, are also rising. How to save electricity to the greatest extent, reduce electricity bills, protect household appliances, and extend their service life has become an urgent desire for every family.
China's 11th Five-Year Plan introduced ten key energy-saving projects, two of which explicitly stipulated the strict implementation of building energy-saving design standards, the promotion of energy-saving retrofits of existing buildings, the promotion of energy-saving products, and the requirement for the use of energy-saving products in commercial buildings, office buildings, residences, and public facilities. China alone needs to invest 2.6 trillion yuan in energy-saving retrofits of existing buildings.
