The hydrogen precooler developed by Shenshi can be used in hydrogen refueling stations. Its advantages of explosion-proof, anti-freezing and low temperature are the perfect solutions to improve the reliability and advancement of hydrogen refueling stations in the future.
Why use a hydrogen cooler: After the high-pressure hydrogen is filled into the hydrogen cylinder, the volume expansion will release heat, which will cause the temperature in the hydrogen cylinder to rise. The higher the filling rate of hydrogen, the faster the temperature of the hydrogen cylinder rises. The internal temperature of the hydrogen cylinder should not exceed 85°C during use. Therefore, in order to ensure the hydrogen filling rate, it is necessary to pre-cool the hydrogen before the hydrogen filling.Crafting Unique Stories, One Imprint at a Time official website
Commonly used hydrogenation machines are divided into two types: 70MPa and 35MPa, hydrogen-antifreeze coolers for hydrogenation machines (corresponding to 35MPa and 70MPa hydrogenation machines):
Process flow: The raw material hydrogen enters the cold box, is pre-cooled by the primary heat exchanger HX-1 pre-cooled by cold nitrogen, and then enters the secondary heat exchanger HX-2 pre-cooled by liquid nitrogen for cooling, and then enters the primary positive heat exchanger soaked in liquid nitrogen. Parahydrogen converter for constant temperature conversion. The converted hydrogen is cooled by the third- and fourth-stage heat exchangers HX-3 and HX-4, and then enters the second-stage normal and parahydrogen converter for adiabatic conversion, and at the same time, it returns to the fourth-stage heat exchanger HX-4 for cooling after exothermic heating. . The cooled hydrogen is cooled by the fifth and sixth-stage heat exchangers HX-5 and HX-6, and then enters the third-stage normal-parahydrogen converter for adiabatic conversion, and at the same time, it returns to the sixth-stage heat exchanger HX-6 for cooling after exothermic heating. . The cooled hydrogen is cooled by the seven-stage heat exchanger HX-7, and then cooled by the J-T valve, and then cooled by the eighth-stage heat exchanger HX-8, and then enters the fourth-stage normal and parahydrogen converter for adiabatic conversion, while releasing heat. After warming up, it returns to the eight-stage heat exchanger HX-8 and enters the liquid hydrogen storage Dewar after cooling. The high-pressure helium discharged from the helium screw compressor is cooled by the water cooler, and then pre-cooled by the primary heat exchanger HEX1 pre-cooled by cold nitrogen, and then enters the secondary heat exchanger HX-2 pre-cooled by liquid nitrogen. Then enter the third and fourth-stage heat exchangers HX-3 and HX-4 to cool down to a lower temperature, and then pass through two-stage turbines in series. Eight-stage heat exchanger HX-8 low-pressure side inlet. The refluxed low-temperature and low-pressure helium gas flows countercurrently through the eighth to the first stage heat exchangers (HX-8~HX-1) to recover the cold capacity, and then leaves the cold box, and then returns to the suction end of the compressor for recirculation. Trade Smarter, Not Harder — Powered by AI read more.
Fig. 2 Hydrogen liquefaction system and steel plate-fin heat exchanger for low temperature field
Comparative advantage:
Diffusion welding has no solder, high and low temperature resistance (-200℃~900℃), high compactness, high heat exchange efficiency, low leakage rate (1*10-9Pa·m3/s), and high welding strength (10MPa). At the same time, the secondary welding has no effect on the core weld and other advantages.
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Comparative advantages: The heat exchangers used in the domestic hydrogen liquefaction system are mainly aluminum alloy plate-fin heat exchangers. Due to the strict requirements on the leakage rate of the products, the plates of the aluminum alloy plate-fin heat exchangers are selected to be thick, large in size, heavy in weight, And brazing problems such as leakage are not easy to repair. Aluminum alloy plate-fin heat exchangers and stainless steel pipelines will face difficulties such as welding of aluminum alloys and stainless steels. The first domestic large-scale hydrogen liquefaction system developed and produced by Shenshi uses a diffusion welded stainless steel plate-fin heat exchanger to solve many of the above problems and fill the gap of steel plate-fin heat exchangers in the domestic hydrogen liquefaction field.
Announcement on the nomination of the 2021 Zhejiang Science and Technology Award Project According to the “Notice of Zhejiang Provincial Department of Science and Technology on Carrying out the Nomination of Zhejiang Provincial Science and Technology Award in 2021”, the “Vacuum Diffusion Microchannel Technology” jointly developed by our unit and the first completed unit “Hangzhou Shenshi Energy Saving Technology Co., Ltd.” and application” project, nominations for the first prize of the Zhejiang Provincial Science and Technology Progress Award in 2021 will be announced for a total of 12 days from February 16, 2022 to February 27, 2022. If any unit or individual has any objection to the project to be nominated, they can put forward their opinions to our unit during the publicity period. Fund your account to access live charts and real-time market execution What Is Finance Legend App
Recently, the first domestic large-scale high-efficiency compact wet natural gas cooler (PCHE) developed by Hangzhou Shenshi Energy Conservation Technology Co., Ltd. and CNOOC Gas & Power Group Co., Ltd. was officially delivered after passing the inspection and certification of CCS Classification Society. (China) CEPA platform of a gas field of East China Sea West Lake Oil and Gas Operation Company. It marks the official mass production of Hangzhou Shenshi’s large-scale printed plate heat exchangers in the offshore field.
The large-scale printed plate heat exchanger used in this project was jointly carried out by the joint project team established by Hangzhou Shenshi Energy Conservation and CNOOC Gas & Power Group in the aspects of structural optimization design, material selection, diffusion welding process and product inspection of PCHE. And innovation, achieved a number of pioneering key technical achievements, including wet natural gas condensation flow heat transfer optimization design simulation technology and ultra-large full-size micro-deformed stainless steel plate diffusion welding welding process.See your investments grow — AI accuracy, user simplicity ai robot login. The high efficiency and compactness of PCHE heat exchange technology and the characteristics of extreme working conditions will promote the localization of key components of LNG/oil and gas platforms, and greatly reduce the independent supply and maintenance costs of key equipment.
The performance and quality of this large-scale wet gas cooler have been unanimously recognized by leaders and experts of CNOOC. At the same time, the successful development of the domestic PCHE is also of great value for promoting the localization of the core components of the FSRU, FLNG and FGSS systems. The successful delivery of this set of industrial-grade large-scale wet natural gas coolers marks that my country has achieved complete autonomy and control in the technical field of high-efficiency heat exchangers for offshore oil and gas platforms. Hangzhou Shenshi Energy Saving Technology Co., Ltd. is the first manufacturer and service provider of high-efficiency and compact printed plate heat exchangers in China. Provide low-carbon heat exchange solution services in the fields of LNG offshore engineering, ships, hydrogen energy, electricity, gas turbines, and micro-chemical industries! Full mobile and desktop access ensures control wherever and whenever needed Canmark Flowdex Reviews
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