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AboutWuhan New World Refrigeration Industry Co., Ltd. (hereinafter referred to as "Wu Leng"), formerly known as Wuhan refrigerator factory, was established in 1954 and has a history of nearly 70 years. It was originally one of the large backbone enterprises under the Ministry of machinery industry, and is now one of the core enterprises of Dalian Bingshan Group.
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ProductsScrew refrigeration compressor, a traditional refrigeration product of Wuleng, has the characteristics of small size, high efficiency, low energy consumption, few wearing parts, high stability and long service life. Since the successful development of the first screw machine in 1978, Wuleng has produced more than 60000 screw machines (sets) and is one of the large backbone enterprises in China's air conditioning and refrigeration industry.
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NewsWith precision machining, compressor assembly, pressure vessel production, unit assembly, cold storage equipment production and other modern assembly lines and 4 sets of product performance testing platform, with an annual output of more than 3000 sets of screw products (sets) capacity.
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CasesThe screw machine produced by Wuleng is widely used in petroleum, chemical industry, air conditioning, refrigeration, hydropower, textile, coal, pharmaceutical, food, beer, sports venues, exhibition centers, marine refrigeration, national defense science and technology and other fields. It has also entered the international markets of Africa, Oceania, South America and Southeast Asia.
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RecruitThe company has also developed new high-efficiency and energy-saving products such as skid-mounted mobile natural gas pressurization, natural gas liquefaction devices, ultra-low temperature cascade units, low-pressure screw blowers, and high-efficiency oil fume purifiers, which contribute to the development of national energy conservation, emission reduction and green environment.
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ContactAfter decades of unremitting efforts, the screw machine developed and produced by Wuleng has won all the national awards for such products for many times, and presided over or participated in the drafting of the national and industry standards for screw machines. It is the vanguard of the domestic screw machine industry.
Technology Development Trend of Screw Refrigeration Compressor under the Target of "Double Carbon" "Hangzhou Refrigeration Exhibition"
2023-08-30
Source: China Refrigeration and Air Conditioning
In order to deal with global climate change, China has put forward the major strategic goal of "achieving carbon peak by 2030 and carbon neutrality by 2060. The refrigeration industry is closely linked to various sectors of the national economy and all aspects of social life. Under the background of carbon neutrality, it will usher in important development opportunities and will also face a series of new challenges. As the core component of the refrigeration system, reducing the carbon emissions of the screw refrigeration compressor is of great significance to realize the carbon reduction of the refrigeration system and help China's "double carbon" strategic goal.
The carbon emission link of the whole life cycle of the screw refrigeration compressor mainly includes five aspects: raw material acquisition, processing and manufacturing, product transportation, operation and maintenance, and scrap recovery. However, the service life of screw refrigerators is usually more than 20 years, and the control of carbon emissions in the long-term operation of the product is the most important. According to statistics, the carbon emissions of operation and maintenance links account for more than 85% of the total life cycle. Therefore, the focus of energy saving and emission reduction of screw refrigeration compressors still needs to be placed on the improvement of product energy efficiency. In this paper, screw refrigeration compressor as the research focus, based on the in-depth study of the industry pain points, put forward a series of screw chiller energy efficiency improvement technology, and discusses its low-carbon application scenarios, in order to "double carbon" under the goal of screw chiller The development trend of the direction.
1 Screw refrigeration compressor energy efficiency improvement technology
As the largest energy-consuming component in the vapor compression refrigeration system, the screw refrigeration compressor is a product with high technical content and difficult to develop and manufacture in the entire industrial chain. Its quality directly affects the energy efficiency of the system. Therefore, the energy efficiency of the screw compressor The improvement is of great significance to the green transformation of the energy-using system. Based on the in-depth study of the existing problems in the industry, this paper puts forward seven new energy efficiency improvement technologies, including profile optimization, variable lead design, use of adaptive porous seal coating, fine management of lubricating oil, permanent magnet frequency conversion technology, two-stage compression interstage air supplement technology and intelligent operation technology, and discusses their working principles and optimization effects, which provides new ideas for the optimization design of future compressors, help the "double carbon" target to be achieved on schedule.
1.1 profile optimization
The core component of screw refrigeration compressor is the intermeshing rotor, and the rotor profile is an important component of screw refrigerator, which directly affects the geometric characteristics such as contact line, leakage triangle, closed volume and tooth area, and fundamentally determines the leakage characteristics, thermal performance, dynamic performance and reliability of screw refrigerator. Therefore, the development of rotor profile is the core technology in its design. Famous screw compressor manufacturers at home and abroad are successful in occupying the market by the development of high-efficiency rotor type lines.
After years of research, the design and calculation method of rotor profile
It has been summarized, but the design method of rotor profile is still improving in recent years. One of the new methods is to use Bezier curve and NURBS instead of conventional curve as the constituent tooth curve, construct curvature gradient curve with tangent vector, and flexibly optimize the profile line by changing node weight, adding control points and moving control points. The optimization case of actual profile line is shown in Figure 1. Another new method is to use the meshing line method based on reverse engineering to construct the profile line, and by constructing the meshing line, directly control the geometric characteristics, the basic principle is shown in Figure 2.
2023
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08-30
Classification:
Industry News
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