A diesel engine consists of two parts, a diesel engine and a generator. Diesel engines use diesel to generate kinetic energy, and generators use kinetic energy to convert it into electrical energy. You just need to use the generator in it and convert it into a fan. But it's probably a bit difficult, unless you have strong hands-on skills. Because it involves the design of the fan blades and so on.
How to reduce the noise of diesel generator sets?
Wind turbine blades can be up to 80 meters long.
The world’s largest wind turbine is located in Maade, Denmark. It is called V164 and was manufactured and installed by Mitsubishi Vestas Offshore Wind Company. This wind turbine is 220 meters high (including the length of the blades), with three giant blades installed on it. Each blade is 80 meters long, which is longer than a Boeing 747. In addition to being the largest, it is also the most powerful wind turbine in the world. Under normal circumstances, it can generate 260,000 kWh of electricity in 24 hours, which is enough to meet the electricity consumption of hundreds of households for one month.
Wind turbines are electrical equipment that convert wind energy into mechanical work, which drives the rotor to rotate and ultimately outputs alternating current. Wind turbines generally consist of wind wheels, generators, diverters, towers, speed limit safety mechanisms, energy storage devices and other components. The working principle of wind turbines is relatively simple. The wind wheel rotates under the action of wind, and it rotates the wind turbine. The kinetic energy of the wind is converted into the mechanical energy of the wind rotor shaft, and the generator rotates under the drive of the wind rotor shaft to generate electricity.
Principle of wind turbine
It is an electrical device that converts wind energy into mechanical energy and mechanical energy into electrical energy. Broadly speaking, it is a heat energy utilization engine that uses the sun as the heat source and the atmosphere as the working medium. Wind power generation uses natural energy, which is much better than diesel power generation. But if it is used for emergencies, it is still not as good as a diesel generator. Wind power is not considered a backup power source, but it can be used for the long term.
The principle of wind power generation is to use wind power to drive the windmill blades to rotate, and then use a speed increaser to increase the speed of rotation to prompt the generator to generate electricity. According to current wind turbine technology, power generation can start at a breeze speed of about three meters per second (the level of breeze). Wind power is becoming a craze in the world because it has no fuel problems and does not produce radiation or air pollution.
Each diesel generator set will produce a lot of noise after starting. In order to reduce the noise, many diesel generator sets purchased by schools, hospitals, hotels, guesthouses and other places have added silent boxes. , In this way, the noise of the diesel generator set can be appropriately reduced, but the cost of the silent box is relatively high. The price of a 30kw diesel generator set is basically the same as the price of the silent box, which invisibly increases the cost, and many companies cannot afford it. How to reduce the noise of diesel generator sets better and more economically? Huaquan Dynamics teaches you a few tricks. ⒈Reduce exhaust noise. Exhaust noise is the main noise source of the unit, and its characteristic is the noise levelHigh, exhaust speed is fast, and management is difficult. Using a special impedance-type composite muffler can generally reduce exhaust noise by 40-60 db (a). ⒉ Reduce axial flow fan noise. When reducing the noise of the cooling fan of the generator set, two issues must be considered. One is the allowable pressure loss in the exhaust channel. The second is the required amount of noise reduction. For the above two points, resistive chip mufflers can be used. ⒊Sound insulation, sound absorption treatment and vibration isolation of the machine room (1) Sound insulation of the machine room. After the exhaust noise and cooling fan noise of the unit are reduced, the main remaining noise sources are diesel engine mechanical noise and combustion noise. The method adopted is to remove all windows except the necessary interior wall observation windows connected to the observation room, all holes and holes must be tightly sealed, and the sound insulation of the brick wall must be above 40 db (a). The computer room doors and windows adopt fireproof and soundproof doors and windows. (2) Air intake and exhaust. After the sound insulation treatment of the computer room, the ventilation and heat dissipation problem in the computer room must be solved. The air inlet should be set on the same straight line as the generator set and air exhaust outlet. The air inlet should be equipped with a resistive piece muffler. Since the pressure loss at the air inlet is also within the allowable range, the air volume in and out of the machine room can be naturally balanced, and the ventilation and heat dissipation effect is obvious. (3) Sound absorption treatment. The five walls in the machine room except the ground can be treated with sound absorption. According to the spectral characteristics of the generator set, a perforated plate resonance sound absorption structure is adopted. (4) The exchange of indoor air and the good sound insulation of the machine room will prevent the air in the room from convection when the closed water-cooled generator is shut down, and the high temperature in the room cannot be lowered in time. Low-noise axial flow fans can be used. Coupled with a resistive chip muffler, the problem can be solved. (5) Vibration isolation of the unit. Before the generator set is installed, vibration isolation treatment should be carried out strictly in accordance with the relevant information provided by the manufacturer to avoid long-distance transmission of structural sound, and continuous radiation of air sound during the propagation, making it impossible to achieve the factory boundary noise level.