How is the pressure released after a reciprocating hydrogen compressor stops operating at zero load?
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As I understand it, both the intake and exhaust valves operate in a one-way manner; the exhaust gas from each stage cannot flow back up to the previous stage. So, during the process of shutting down the system under reduced load, how is the pressure at the outlets of the three stages released automatically, given that there are check valves at those outlets? Of course, after shutdown, the pressures at various levels can be released manually.
At 0 load, none of the valves operate; in other words, there is no flow from the inlet to the outlet. Once the load is reduced, the system pressure gradually decreases, but some pressure still remains. Even when the load reaches 0, there is still pressure at the outlet, and the only way to relieve this pressure is to shut off the inlet and outlet valves after shutting down the machine