I wrote:
> Nope. As you will see in the photos, if I can manage to untangle them and > upload them, the reservoir is sitting on a weight scale. (It wasn't the H2 > bottle, it was the water reservoir.) You can monitor the decrease in water. > Okay. I finally managed to upload the document. I refer to Fig. 1. The reservoir is the white plastic Jerry Can in the left of the photo, with the funnel on top. They told me that during the longer runs, they had to replenish it. So obviously the water is going out of it at a rapid rate. Also, in the video you can hear and see the pump periodically actuating and sending a pulse of water down the hose. That's a large gulp of water, not 900 g/hr. Constant displacement pumps are good because they remove a fixed amount of liquid at a fixed period. A flowmeter is less necessary than with a peristaltic pump, which tends to vary the amount it takes with each stroke. A flowmeter is not necessary at all when the reservoir is sitting on a weight scale. That's actually a lot better than a flowmeter, because in my experience, flowmeters are as ornery as computer printers. Regarding the H2 bottle, someone in the project just informed me that they * did* weigh it, at the beginning of the experiment and at the end. There was no measurable change. - Jed
