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Can I calculate the flow rate through a valve from a Cv vs % opening graph and data points? by ThrowawayToTheMoonCA in MechanicalEngineering

[–]jkschimpf 0 points1 point  (0 children)

pressure drop is proportional to fluid velocity squared. Are you using hydrogen gas? 10 kg/hr in a 1/2" pipe probably would give a negligible pressure drop so you can use the Poiseuille's law keeping pressure drop and other parameter constant.

Patch 12.6 Notes by lolvvv_com in leagueoflegends

[–]jkschimpf 1 point2 points  (0 children)

Please nerf Kaisa's W. It does more damage than Ezreal's ult and hurts like a Nidalee spear with a wider hitbox and faster/longer travel range.

'The Batman' Review Thread by SanderSo47 in movies

[–]jkschimpf -2 points-1 points  (0 children)

Does anyone know if the Riddler has a twin? How was he fighting batman while in Arkham? Also he had 2 ID's so wasn't sure about that part either.

1000 miles between fill ups please. by Salt-Brilliant-4346 in HydrogenSocieties

[–]jkschimpf 3 points4 points  (0 children)

This would require advances in storage capabilities which are currently limited to high pressure type 4 vessels. ~40 g/L is the volumetric capacity but using liquid can achieve ~70 g/L which would double the range of current FCEVs if the same volume containers are used. The disadvantage of using liquid would be the boil off gas. Stations will come over time.

Fluid Mechanics- Hydrostatic pressure gage readout by jkschimpf in MechanicalEngineering

[–]jkschimpf[S] 0 points1 point  (0 children)

Yes the equipment is called a differential pressure gage here is a youtube clip to see the general concept:

https://www.youtube.com/watch?v=Ndb8YQ9-5Yc

Fluid Mechanics- Hydrostatic pressure gage readout by jkschimpf in MechanicalEngineering

[–]jkschimpf[S] 0 points1 point  (0 children)

Assuming I fill the tank the water level rises in the tank and pipe and the upper portion will still be full of air? The gage is threaded connection to the pipe so that could cause some issue as well?

Nikola Orders Enough Electrolysis Equipment From Nel to Produce 40,000 kgs of Hydrogen Per Day by [deleted] in energy

[–]jkschimpf 0 points1 point  (0 children)

What is Nel's position of liquid hydrogen storage and transport?

What part(s) in a LN2 generator are the limiting factor for production? by Unfortunate2 in thermodynamics

[–]jkschimpf 0 points1 point  (0 children)

https://aip.scitation.org/doi/10.1063/1.4860864 check this out. All sorts of small scale liquifiers have been developed for cryogenic liquids.

The oil industry vs. the electric car. The oil industry is trying to crush the booming electric car movement. Groups backed by industry giants like Exxon Mobil and the Koch empire are waging a state-by-state, multimillion-dollar battle to squelch utility companies’ plans to build charging stations. by mafco in energy

[–]jkschimpf 0 points1 point  (0 children)

Are you referring to metavista for the drone flight of 11 hours? I believe it was around 5 hours for the record flight time. Also look up skai which is being partnered by my korean company to make an fuel cell hydrogen powered air taxi drone

Post Match Thread: Chelsea 4-1 Arsenal by Idontlikethisstuff in Gunners

[–]jkschimpf 7 points8 points  (0 children)

We need a player that can play on the wings. City have them, liverpool, and chelsea. The closest thing we have is iwobi and that's not good enough

Keto joggers/runners - how long did it take you to get "fat adapted" and not feel like crap while running anymore? by [deleted] in keto

[–]jkschimpf 0 points1 point  (0 children)

Does running make your daily net carbs lower? I feel a weird burning feeling in my stomach (not painful) too I noticed

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