2000Nm³/H:The First Large-Displacement Liquid Driven Compressor for HRS in China successfully Delivered and Completes Hoisting



HRS is an essential infrastructure for the hydrogen development. The hydrogen compressor used in HRS in China are mainly diaphragm compressors and liquid driven compressors at present. Higher requirement for the compressor displacement are required with the promotion of large scale commercial use of HRS.




December 8, the first liquid driven compressor for HRS in China, capable of 2000 Nm3/h hydrogen compress, designed and produced by COMPRESS, a leading liquid driven compressor company in China, successfully completes hoisting at Qingdao Refining and Chemical Hydrogen Energy Base after 8 months of design, research & development, manufacturing, testing, and improvement.


The total amount of hydrogen produced and supplied by Qingdao Refining & Chemical will reach 3,000 Nm3/h after the official operation of the compressor, which marks the liquid driven compressor development in China entering new stage.


The compressor displacement can reach 2,000 Nm3/h under the inlet pressure of 2 Mpa and exhaust pressure of 20Mpa, which is currently the liquid driven compressor with the largest displacement in China, according to COMPRESS. Moreover, the compressor adopts dual- system design, which can run both simultaneously or independently.




The product was originally designed to tackle the current difficulties in the hydrogen supply field, such as small displacement, 24 hours continuous startup, and heavy maintenance, according to the in charge of the project.


“The hydrogen demand in Qingdao was relatively small in the early stage. The effective run time of the hydrogen filling compressor was only 3-4 hours per day, with remaining 20 hours run under load. The cumulative electricity consumption reaches more than 4000kWh/day (200kWh/h electricity consumption). Also the hydrogen filling at night are strongly not recommended even under normal hydrogen supply scenario for safety reason, but the compressor still needs to run continuously, which general exists in the field of chemical by-product hydrogen purification with external hydrogen supply”, the above mentioned in charge said.




Qingdao COMPRESS and Qingdao Refining & Chemical Co., Ltd. applied for a scientific and technological research project in the hydrogen field of Sinopec to develop a large-displacement liquid driven compressor for the hydrogen filling to address the energy waster problem. The liquid driven compressor can start and stop at any time according to external requirements, which solves the continuous operation problem compared with traditional compressor, which saves more than 900,000 kWh/year electricity consumption and reduce the cost of hydrogen supply at HRS.


Qingdao Refining & Chemical Co., Ltd. has cooperated with COMPRESS to lease its 260Nm³/h liquid driven compressor for temporary filling of hydrogen tankers as early as 2021 to address the multiple failure of the diaphragm compressor in short period.


The research and development of the large- displacement liquid driven compressor of COMPRESS marks undoubtedly a big step forward in the compressor development in China.


Qingdao COMPRESS is one of the few liquid driven compressor manufacturers in China with independent intellectual property rights. The COMPRESS designed compressors have simpler structure and fewer parts compared with other manufactures. For example, the moving part consists only the piston rod and four pistons attached to the connecting rod; the major components that make up a hydraulic power system has been reduced from 26 parts to 7 parts, which effectively improved efficiency and reduced costs.


Qingdao COMPRESS will continue to improve the compressor competitiveness and plan to build zero-carbon production base, green hydrogen demonstration HRS, and hydrogen equipment research and testing center in the future. The green hydrogen produced from solar energy electrolysis will be stored in the HRS through self- produced filling compressor, and then fill the hydrogen to FCEVs, forming a green hydrogen production, storage, supply and filling integrated energy utilization model, achieving the functions of renewable energy storage and valley electricity consumption.


Using the method of photovoltaic electrolysis of water to produce hydrogen, the self-developed and self-produced filling compressor is stored in the hydrogenation station, and then the hydrogen fuel cell vehicle is refilled with the compressor through the hydrogenation station, forming a green hydrogen production, storage, supply, Combined with an integrated energy comprehensive utilization model.


Source:Qingdao COMPRESS


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