3 ms·
Using gpm=(hp x 1715 x efficiency)/psi and allowing for 90% pump efficiency along with max 1.93 hp continuous from a 15A 120VAC receptacle, we can simplify the
by foofoo55 10y ago
Using gpm=(hp x 1715 x efficiency)/psi and allowing for 90% pump efficiency along with max 1.93 hp continuous from a 15A 120VAC receptacle, we can simplify the pumping-water-with-a-North-American-receptacle equation to gpm=3000/psi. So 10k psi outputs only 0.3 gpm, 3000psi outputs 1gpm, and 2000psi spits out 1.5 gpm (the latter of which matches the output from the top electric pressure washers).
- Cerium 10y agoAnd since they said that it uses 10-20% the water of a standard shower head... A modern shower head uses about 2gpm, so we are talking about 0.2 to 0.4gpm. That would give us a pressure of about 7500 to 15000psi using your equation.
- cconcepts 10y agoThis is much more realistic. 3k psi will struggle to cut a cake.
- kuschku 10y agoAs someone used to metric, this is probably the msot confusing comment chain I've read yet o.O
- JshWright 10y agoYou don't measure cutting force in cakes?
- cconcepts 10y agoFor those that need it in metric, a cake is roughly equivalent to a scone...
- aidenn0 10y agoAt least in the UK, Her Majesties Customs and Excise tried to measure it in biscuits (which require 17.5% greater cutting force than cakes), but Mcvities prevailed in the courts.
- 50CNT 10y agoWe measure cutting force using a very old baguette held at the Bureau international des poids et mesures.
- noonespecial 10y agoThat sounds like the worst case to me. They are doing their demos with 7500 psi from an outboard pump and thinking that it's going to be a minor detail that can be worked out after the kickstarter succeeds to generate a workable pressure from 15A 120v. If they told us the pressure they're using for their demos, some smarty with a slide-rule might call them on getting that from a normal wall outlet.