Is it reasonable, according to everyone, for the outlet of the new hydrogen pump to be closed as part of the shutdown logic for the cycle hydrogen pump in diesel engine hydrogen systems?
Thread Content
Is it reasonable, according to everyone, for the outlet of the new hydrogen pump to be closed as part of the shutdown logic for the cycle hydrogen pump in diesel engine hydrogen systems?
I believe the drawback of this design is that the vast majority of new hydrogen generators are reciprocating type; if the outlet is closed under operating conditions, the outlet pressure will rise rapidly until the safety valve activates (provided that the safety valve functions properly). As the activation pressure of the safety valve increases, the exhaust temperature will also rise above safe levels.
The shutdown of the cyclic hydrogen compressor will trigger the shutdown of the new hydrogen compressor, and the outlet electric valve will naturally close, which is reasonable
The pressure difference between the inlet and outlet of the new hydrogen engine is high; in an emergency, if there is a malfunction in the check valve at the engine’s outlet, serious accidents such as high pressure leaking into low pressure can occur. It is therefore necessary to install an additional emergency shut-off valve. A few days ago, a tragic accident occurred in a certain Chaijia unit due to high pressure being connected to low pressure; lessons must be learned from this!
The circulation machine stops; the control valve on the return line of the new hydrogen machine is fully opened, and the outlet shut-off valve of the new hydrogen machine is fully closed
It makes sense for the new hydrogen compressor to shut down automatically or have its load reduced to 0, with the outlet valve also being closed at the same time
It is reasonable to shut down the circulation machine; simultaneously, the interlock will cause the new hydrogen generator to stop operating, and the electric valve at the outlet of the new hydrogen generator will be closed to prevent pressure surges. No problem. .
After the new hydrogen machine sequentially shuts down its outlets, it is necessary to activate the recirculation system within the return line to prevent overpressure from causing damage to the equipment.
It’s reasonable, but the interlock must ensure that the outlet valve closes only after the new hydrogen compressor stops or automatic unloading occurs
I agree with you; it would be more reasonable if, in the case of a new hydrogen generator, the shutdown interlock output were turned off and the return line opened
After the circulating hydrogen compressor is shut down, manually verify whether the new hydrogen compressor needs to be stopped; this is our logic