On March 27th, the project of joint research and development of 25kW free piston internal-combustion linear generators undertaken by the Advanced Manufacturing Institute of the Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences carried out a technical acceptance and the experts participated in the implementation of the project. The process and the results achieved were highly valued. Seven scientific research institutes and business experts passed the technical acceptance of the project with their excellent acceptance review opinions.
The free-piston internal combustion linear generator eliminates the crankshaft linkage mechanism and the mechanical flywheel. It directly connects the piston rod with the linear generator, and has high efficiency, low emissions, high power density, and low noise compared to conventional internal combustion generators. , Can adapt to a variety of fuels and other characteristics. As a new type of series hybrid power unit, it is considered as an innovative future power technology along with fuel cell and other technologies. It can be widely applied to various military and civilian ships, communication base stations, mobile power stations, island power generation, and new energy sources. Automobiles, cogeneration and other fields.
The joint research and development of "25kW free piston internal combustion linear combustion generators" undertaken by Ningbo Materials Co., Ltd. was developed through cooperation with the University of Michigan and the University of Minnesota. It absorbed the US design and combustion control, system integration and optimization of free piston internal combustion engines, etc. The technology and experience have broken through the analysis and control of the combustion process of a free-piston internal combustion engine, the coupling mechanism analysis and matching design of an internal combustion engine and a linear generator, the optimization design of a double-sided flat permanent magnet linear generator and a cylindrical voice coil motor, and the efficient and stable system Key technologies such as operation control, system iterative integration, and performance testing solve the bottleneck problem of efficient and stable operation of a free-piston internal combustion linear generator, and successfully developed an efficient high-power density internal combustion linear power generation system. For the first time in China, the stable operation of a twin parallel 30kW free-piston internal combustion linear generator has been realized. The overall power generation efficiency of the system has reached 37.4%, breaking the international monopoly of technology. The project applied for 1 related PCT patent, 8 domestic invention patents and 9 utility model patents; 11 articles were published.
Compared with traditional internal combustion engines, the internal combustion linear power generation system developed in this project will increase the total power generation efficiency of the internal combustion engine power generation system by 30% and increase the mileage of electric vehicles by more than 50%. The free-piston internal-combustion linear power generation system can also reduce harmful emissions and can use a variety of fuels, which will help promote the development of China's automobile industry, create new energy-saving and emission-reducing industries, and have significant social benefits. The project results attracted the interest of the German Aerospace Center (DLR) and came to discuss industrial cooperation issues. It is hoped that the relevant state departments will increase investment, continue the follow-up research and development of the project, and promote its early industrialization.
Super duplex stainless steels are generally more complex, more highly alloyed materials with PREN (Pitting Resistance Equivalent number) = 40.0 and offer even higher strength and corrosion resistance making them suitable for very demanding applications such as offshore marine engineering.
Trade Name
UNS
Super Duplex Industry Specifications
Chemical Composition
Min.Tensile
Min.Yield
Elongation
SAF 2507®
UNS S32750
ASTM A182 F53, A240, A276, A479, A789, A790, A815, A928, A988
C 0.030 max
116
80
15
UNS S32760
ASTM A182 F55, A240, A276, A314, A473, A479, A789, A790, A815, A928, A988
C 0.03 max
109
80
25
UNS S32750 & UNS S32760
(KSI)
(KSI)
%
SAE J405
Cr 24.0-26.0
Cu 0.5 max
Mn 1.20 max
Mo 3.0-5.0
N 0.24-0.32
Ni 6.0-8.0
P 0.035 max
S 0.020 max
Si 0.8 max
SAE J405
Cr 24.0-26.0
Cu 0.5-1.0
Mn 1.0 max
Mo 3.0-4.0
N 0.2-0.3
Ni 6.0-8.0
P 0.03 max
S 0.01 max
Si 1.0 max
W 0.5-1.0
Super Duplex Steel Tube,Super Duplex Steel Pipe,Super Duplex Stainless Steel Tube,Super Duplex Stainless Steel Pipe
Zhejiang Max Stainless Steel Co.,Ltd , https://www.cnstainlesstube.com