Meeting starts 13:02

Greg starts off updates

We can use the single stage unit to get pressure from 70 to 1400 psi. 70 psi is too high of pressure for the dewar, we’ll have to drop to 50 psi.

The flow rate is 0.15 SCFM at this pumping pressure, an order of magnitude less than what we are currently running.

By using both Haskel pumps, we can get up to the flow rate we want. Both in series would be much higher flowrate of air – about 100 scfm. This might be an issue with the air compressor.

Flow measurements can be done with new Sierra flowmeters.

Double acting Haskel pump needs a refurbish kit. Single acting is likely fine, but may need seals replaced.

Jose is next

Typed up a failure mode analysis, drafted the procedure for testing in our expected tests.

Emailed quite a few companies about bayonet type pass thoughs and got several nos, but a few interested. Prentax has not responded yet, might try contacting again. Technifab hasn’t said no, but are cautious.

Don’t know about vacuum jacketed lines – most are only rated 100 – 250 psi

We could make our own line, and either put it in vacuum or coat in Cryogel. This would be the simple, cheap route.

Send Jake a note about the bayonet design and coding to model heat transfer.

Remind Jake to talk to UW Madison about how they transfer out of their liquefier

Sage is next

Working on how to bolt down the gas bottle rack to the container per CFR codes. Use standards to calculate bolt requirements. Look at locking nut washer combiniations to make sure that the bolts stay tight.

Dustin

Dustin is meeting with Trip to look at the facilities we may be putting the station at 2:30. He’s going to make sure to let him know we are just reviewing possible sites for permanent locations of the station. Dustin has also begun looking at locations in Longview

Sam

Sam has a circuit diagram for how to set up the fan controls. He decided that the roughly $40 a month saved by not running active fans constanly doesn’t save enough money to make up for the additional expense of a velocity measurement system.

Starting meeting 13:30

Discuss 1/16″ mNPT to 1/4″ VCR connections. Current connections are fVCR, and have the female nut attached in the adapter

Discuss Sam’s proposal for summer work. Jake approves, but reminds Sam we will need his help as an electrical expert on other work as the summer progresses as well.

BOM (Bill of Materials) Discussion:

CAD has been simplified to bare minimum components – we’re getting really close. Supports are likely not going to be needed with steel tubing, but we have the ability to add them in, if required. Bayonet line has not been designed / found yet. Jose and Will will continue to develop this. Looking to rate at around 1400-2000 psig. Suggested that we add a second heat exhanger after the first to precool the inlet gas before the vortex tube.

Two week goals:

Will – Manufacture as parts come in, look at connections to other systems. Help Andrew with CAD of purifier, help Jose with test plans for components and systems. Find bayonet/vacuum jacketed transfer line.

Jose – Work with Will to find the vacuum jacketed transfer line. Write test plans and safety / hazard analysis for the system testing with the help of Will.

Sam – Finalize bill of materials / P&ID for the venting and safety systems so that we’re ready to order parts. Have an initial design pitch ready for when we get back for feedback and/or ordering.

Sage – Work to finish the CAD model with updates with the latest changes to the overall system and ensure that everything is propely placed and mated.

Andrew – Work on getting CAD of purifier designs put together. Get an intial concept pitch ready to propose some design paradigms so we can start ordering and building.

-Meeting begins 13:18

Review last meeting, Jake suggests taking notes with action items each meeting

Jake asks about OXARC bottle holder – should be coming in soon. No one had heard about it, so Jake calls to ask about it.

Monday is a walkthough with a bunch of middleschoolers, Friday is Cleatch Alliance meeting. Imagine tomorrow is next Saturday. hundred of high schoolers will be coming through just outside TFRB. They want to showcase the hydrogen refueling station concept.

Need to come up with something to display what we’re doing

Discussed items:

• Print the HEF poster and get it put on the door
• Layout items on the inside
• Get vinyl on the outside
  • Sponsors
  • Logo
• Shirts?

ACTION ITEMS:

• Print the HEF poster and get it put on the door
• Put other lab posters up around the container
• Get vinyl on the outside?
  • Sponsors
  • Logo
• Shirts?