What are the reasons why a gas cycle compressor cannot build pressure?
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During the startup phase, the system voltage is being increased, and oil has not yet been introduced. The pressure of the new hydrogen is 2.2 Mpa, while the system requires a pressure of 2.8~2.9. When the system pressure reaches 2.4 Mpa, it is no longer possible to increase the pressure. At this time, the inlet and outlet pressures of the circulating compressor are 2.3 and 2.5 Mpa respectively. Later, a new hydrogen compressor was put into use and operated in series with the circulation pump, which allowed the pressure to rise. Inlet and outlet pressures of the new hydrogen compressor: 2.2, 2.6 ； Inlet and outlet pressures of the circulator: 2.6, 3.4. The gas from the outlet of the new hydrogen compressor goes to the buffer tank at the inlet of the recycler. Thought 1: Why can’t the circulation machine increase voltage? Is it because the pipeline network is too unobstructed that pressure cannot be increased? Thought 2: The inlet and outlet of the circulation machine are connected by a pipeline; could using this pipeline help increase the pressure?
The original poster, please explain what type of compressors your new hydrogen compressor and the circulating hydrogen compressor are, so that everyone can analyze and discuss it
Original poster, take a close look at your process: generally, circulation pumps provide a large flow rate but have limited pressure-raising capacity, while hydrogen production units are responsible for maintaining the system pressure. This is normal!
The new hydrogen pump is used for pressure boosting and replenishment, while the circulation pump provides the circulation volume; its pressure-boosting capacity is limited. After the inlet and outlet connection pipes are put into use, there is no circulating hydrogen in the system; as a result, the system loses its driving force and cannot be operated! ! !
Isn’t the role of the new hydrogen compressor then to increase the inlet pressure of the cycle machine?
“The “import and export connection pipe” is generally used to open this bypass during startup or shutdown in order to enable operation under light load, thereby protecting the compressor’s driving components and preventing overload.
The outlet pressure of a positive-displacement compressor is determined by the system pressure; by raising the system pressure to an appropriate level, the outlet pressure of your cyclohydrogen compressor will increase as well.
It can be said that, to be precise, it is the new hydrogen machine that increases the system pressure.
It should be the increase in the inlet pressure of the circulator that leads to an increase in the outlet pressure of the circulator, thereby raising the system pressure. Can the inlet pressure of the circulator be increased through the outlet-to-inlet pipeline? Thus, shutting down the new hydrogen generator achieves energy savings?
The problem was that the system pressure could not be increased at that time; raising the inlet pressure of the circulation pump could only be achieved by starting a new hydrogen pump.