Hydrogen pipeline network pressure
Thread Content
In a natural gas-to-hydrogen plant equipped with pressure swing adsorption, during stable operation, does the pressure in the hydrogen pipeline network follow a linear trend or a curve with regular fluctuations?
The pressure is very stable with minimal fluctuations; it’s just the flow rate that varies a lot!
What does a trend line look like? Is it a straight line?
It depends on the capacity of your hydrogen pipeline network; the smaller the capacity, the greater the pressure fluctuations. The trend line is a regular wavy line
In my opinion, if everything is stable, the pressure trend line of the pipeline network should be a straight line; why is it wavy? Is it caused by pressure swing adsorption?
One can take a look at the consumption of fresh hydrogen by the hydrogen-consuming units downstream. With so many such units in refineries, it’s unlikely that the hydrogen usage across all of them remains constant. As long as there is a high demand for hydrogen, it gradually accumulates in the pipeline network, causing the pressure to rise slowly; the opposite is also true.
As long as there is an imbalance between supply and demand, fluctuations are bound to occur! I just want to ask whether, under normal circumstances, there are regular fluctuations or it tends to be more of a straight line
It should be said that there is no pattern at all; it’s almost impossible for it to be a straight line. Ideally, there should be fewer peaks and troughs in pressure per unit of time.
For curves that show near-random fluctuations, both the hydrogen consumption and production by the device are not constant; it’s rare for there to be a completely linear trend in the data, as such a linear pattern is actually concerning
When the pressure in our hydrogen pipeline network is stable, it follows a regular pattern of peaks and valleys. In such stable conditions, the values of these peaks and valleys are either extremely close to or exactly the same as those from previous periods of stability! I’ve been wondering what exactly is causing this trend
I can understand what you mean, but on our end, when things are stable, there is a regular pattern in the curves, with the peak and trough values being similar or equal to each other. Moreover, the experienced technician said that this wavelength period is related to the pressure swing adsorption time! I keep thinking about it but can’t figure it out!