On the circulation volume of the cyclic hydrogen compressor at different pressures
Thread Content
There is a cyclic hydrogen compressor with a design inlet pressure of 22 MPa and an outlet pressure of 22.5 MPa, as well as a flow rate of 1600 standard cubic meters. What would be its volumetric flow rate if it operated at an inlet pressure of 16 MPa? Would it be less than 1600, based on the formula PV=nRT?
It must have decreased; the inlet pressure is low and the flow rate is also low. Similarly, when the inlet pressure increases, the flow rate increases as well
It’s less than 1,600 cubic meters now; operation needs to be carried out smoothly
It should be 1600, as everything is converted to standard cubic feet; I think it depends only on the pressure difference between inlet and outlet and the purity level
Compressors actually convert volumetric flow rate into standard cubic flow rate; when the inlet pressure of the same compressor decreases, the amount of gas discharged will naturally decrease as well. When the pressure at the compressor inlet of the poster dropped to 16 Mpa, a rough calculation showed that the air delivery volume was around 1,165 cubic meters.
Is the poster playing around with theories? 1. Is the 22 Mpa hydrogenation process still in use? Converted to 220 Bar; the pressure used in the first generation of hydrogenation experiments back then was 800 Bar. Subsequently, efforts were made to reduce this pressure, and the modern approach involves using catalysts with high catalytic efficiency at lower pressures (similar to the trend of miniaturization in nuclear technology). 2. There is a misconception regarding standard flow rate: it is thought that the flow rate remains unchanged when the operating pressure changes, but that’s incorrect! It should be understood that the operating pressure remains constant; the flow rate remains the same regardless of the pressure. For example, if the flow rate at the first stage is 1000, it will still be 1000 after second-stage compression and also after third-stage compression – the total flow rate does not change. The reason for this is that the calculation formulas in the flow meters for the first, second, and third stages are different, corresponding to the pressures at those respective stages It’s that when the corresponding pressure changes, the flow rate calculation becomes inaccurate. 3. Answer to the title: The operating pressure changed from 22MPA to 16MPA; the flow meter overestimated the value, so the actual amount is less.
Pilot scale production – that’s why the traffic volume is so low, I guess. . . . . I’ve never seen a circulating hydrogen flow rate below 100,000 standard cubic meters. Our unit uses over 1.8 million cubic meters of recycled hydrogen