What really happened? The following article explains for readers.
Too many types and advertisements of electricity-saving devices
Electricity-saving devices (TBTKĐ , Power saver) is a small device that is plugged into any electrical outlet in the house with the primary purpose of stabilizing the voltage and reducing “useless” power consumption.
Electricity saving devices
Since the 80s of the last century due to the The increase in computers, fax machines, photocopiers and “variable frequency” drives is called “nonlinear loads”. Nonlinear loads require the use of “in pulse” current, which is different from traditional electrical equipment. This use of pulsed current creates disturbing noise and heating that causes interference and damage to sensitive electrical systems. Therefore, when using electronic devices and computers, it is necessary to have equipment to filter noise and heat generated.
To sell a lot of TBTKD, some special trading companies Especially e-commerce over the internet often boast that this device can save electricity by 35-40% or even up to 50%.
But it operates according to one principle. simple reason
Household electric current intensity is often unstable. The current often fluctuates, creating many increasing and decreasing voltage peaks. When the electric current is unstable, household appliances often do not function properly and waste electricity by converting electricity into heat (heat). This generated heat is wasted when it enters the atmosphere, not only heating the environment but also damaging the devices and circuits. The amount of electricity used to create this heat is called waste electricity
Operating diagram of electricity saving device
Thanks to the system of harmonic resistant capacitors, the The TBTKD will store excess electricity when it is high and release a stable current with no or little fluctuations into the household electrical network. The system also automatically removes carbon from the electrical circuit to help the current flow more smoothly with fewer spikes.
Basically, the TBTKD operates on the principle of lightning protection technology (surge protection technology), it will “straightens” the fluctuating current to create a stable and smooth output for household appliances. It can be said that the TBTKD uses capacitors as a filter that only allows a smooth, steady flow to pass through increasing the current in the capacitor circuit which will store excess charge and release it when there is a sudden drop. In short, TBTKD will inhibit “lightning” and “peak” electricity (surge and spike suppression), helping to protect and prolong the life of household electrical equipment when the voltage suddenly increases.
In addition The main effect on the TBTKD also has other effects: Removing any carbon produced by the discharge process in the system facilitates a smoother, more stable current flow and creates a harmonious system (harmonic filtration). for electrical current in “pulses” that cause noise and heat sensitive electrical equipment.
Some discussion</ p>
There are many forms of energy: electrical energy, thermal energy, solar energy, chemical energy… and these forms of energy can all be converted to each other according to the law of conservation of energy. For example: (1) 736 watthours of electrical energy can be converted into 1 horsepower (CV) of mechanical energy and thus a 1CV air conditioner must use at least 0 736 kwatthours (0 736 words of electricity) per hour; (2) By definition, 1 calorie is the amount of heat needed to raise 1 gram of water to 1 degree Celsius, so to boil 1 liter of water requires at least 100,000 calories or 0 116 kwatt hours (0.116 words) of electricity.
When using household electrical appliances, the first thing is to ensure that the amount of electricity is converted into the necessary form of power according to the design capacity of the device used. . If the input power is not enough, there will certainly not be enough output power, not to mention the energy lost during operation.
According to Prof. Dr. Nguyen Xuan Chanh, former Director of the Vietnam Institute of Industrial Physics, each electrical appliance has a power factor (HSDDD power factor) which is the effective ratio of used power/supplied power. vary depending on the manufacturer’s manufacturing method. The highest HSDDD is an example of a stove and dryer because these devices convert all electrical energy into heat for heating and light. Household electrical appliances usually have an average HSD of 0 77. The ACs only help us save electricity by reducing reactive power, which is this useless loss of power. Therefore, according to scientific calculations, power converters only save a maximum of 2 – 5% of electricity consumption through increasing electricity efficiency, and marketing power converters to reduce up to 30-40% of electricity consumption is a waste. The numbers are intentionally exaggerated and have no scientific basis.
Assoc. Prof. Nguyen Van Lien, Head of the Department of Electrical Engineering, Hanoi University of Science and Technology, and Dr. Nguyen Van Khai, Director of the Center for Electricity Saving Consulting, are both believes that “there cannot be any device that helps us provide less power than the rated power but still makes the electrical device operate normally
It is important to note the only possibility Energy savings can occur if the TDC must be placed close to the circuit when there is a starting reactive load (such as a motor) and must be removed from the circuit when the motor is not running. This is not practical because it is possible that many motors in the house (refrigerators, air conditioners, air blowers, vacuum cleaners, etc.) start at the same time but the TBTKD is connected regularly. Furthermore, adding capacitors can also interact with power transmission lines increasing voltage to dangerous levels and adding a capacitor to a line has harmonic frequencies created by a The number of electronic devices can lead to unwanted resonance and increased voltage.
In my opinion, the amount of electricity used is proportional to the number of electrical devices we use. These devices have different performance, so to save electricity, you need to choose good, reputable brands. And reducing electricity costs is not necessarily due to savings thanks to TBTKD, but is often due to efforts to reduce reasonable use in the family.
Tran Ba Thoai
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