Fan equipment is a product of the times. It is set up in the space for air supply and discharge and electricity consumption. It evolves with the continuous construction needs of the building, and evolves under the demands of human comfort. From the historical and regional development, we can know that as early as the ancient Greek period to the tenth century in the Chinese and Western cultures, the wind energy through the windmill was converted into mechanical energy as the needs of life such as rolling the valley and irrigation. After the Industrial Revolution, from the 18th to the 19th century, the era of steam power, iron and steel and electricity consumption was opened up. In turn, the application of the fan opened the prelude.
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The air compressor system has always been the bulk of electricity in the production plant, and it consumes a lot of energy (heat) after doing work. As for the design and recovery of the compression section of the air compressor (such as the heat energy generated by the first or second stage compression), I am worried that improper design will affect the output. The efficiency of waste heat recovery varies according to the design of each air compressor manufacturer. At present, most of the industry plans are limited to the energy saving of a single machine, and the air compressor has reached the biggest bottleneck in energy saving due to the advanced industry's hard work and hard work. is approaching the limit. Therefore, how to effectively recover the waste heat generated by the air compressor and make effective use of it, so as to maximize the energy efficiency of the overall compressed air system, will be the focus of this article.
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How to correctly classify and test air filters has long been a problem that practitioners in the air-conditioning field have attached great importance to. Due to the different testing and classification methods of national standards, it is more difficult for the global sales of products. And the generation of new filtration technology and materials, the old test methods and grading standards are not easy to objectively evaluate the performance of the filter. The ISO16890 "Filters for General Ventilation" recently proposed by the ISO organization proposes testing and grading specifications to make up for each country's testing methods, hoping to effectively reduce the current difficulties encountered by the air filter industry in the future.
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This article introduces the energy-saving electric and hot water washing type local exhaust gas treatment equipment in the factory, which uses high temperature 750℃ to heat and crack the gas generated by the chemical vapor deposition and dry etching process. After the temperature is lowered, the waste gas pipe is collected and introduced into the central scrubber of the factory system, and then treated by the wet scrubber of the factory and discharged into the atmosphere, so as to achieve the effect of energy saving and carbon reduction.
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The purpose of this article is to improve the clean room air supply system FFU, so that it has high performance, efficiency and high uniformity of air outlet requirements. In order to speed up the improvement process and reduce the cost of prototyping, first by developing mature numerical analysis CFD software Fluent, Carry out flow field simulation for the original design of FFU; make various charts for the calculation results for detailed flow field visualization, determine the location and cause of the flow field loss through careful observation and analysis, and then propose improvements based on the flow field loss.
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Almost every high-tech industry has PCW-Process Cooling Water System (process 冷 but water system). As the name implies, PCW is used in machines, instruments, etc. that generate heat during the process. These devices are collectively referred to as "process machines" or "machines." This was originally a very simple water system, but it became very important because of the booming high-tech industry.
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The pressure formed by the HEPA filter due to wind speed and dust collection is also known as pressure loss, which is contaminated by particles The accumulation of objects will gradually increase the pressure 降, and as the pressure increases, it will directly affect the collection efficiency 率, wind 量 And equipment operating costs. In this study, the full efficiency of a full-size HEPA filter was established (overall efficiency) The test platform uses PAO aerosol as the test micrometer to discuss the pressure and dust holding capacity of the HEPA filter Of effect.
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Formaldehyde is an indoor air pollutant commonly found in construction materials. Too much formaldehyde inhaled by the human body is easy to cause cancer. There are ways to use porous substrates for catalytic oxidation, physical adsorption and chemical reactions, etc. Most of physical adsorption uses expanded porous substrate ratio The surface area is adsorbed by formaldehyde force with van der Waals force, but it is often easy to cause adsorption saturation and desorption during formaldehyde adsorption. To improve this problem, In this study, the surface of the activated carbon was coated with silver and silver oxide by hydrothermal synthesis.
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This research develops a new type of fine suspended particle sensing method. The sensing principle is that when charged particles touch the collecting electrode, the The power of the particles is detected by the meter, and the current signal strength represents the concentration of the particles.
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