Developing a control system and converting pounds per min. to gallons per min.

jkerekes said:

I think you mean a Gallon of water @ 40 Degf. won't weight the same at 80 degf. Of a pound of water will weigh a pound at any temperature.

Click to expand...

OOPS yes that is exactly what I meant to say but surely NOT what I said
- ah what the heck I just re wrote the laws of physics.

Dan Bentler

is this an english imperial Gallon or an American Gallon

Iant

Well since I am in America and I get the water out of an American water pipe it must be an American gallon. Ah what the ,,, since I paid for the water and I am rewriting the laws of physics it is now the Bentler Gallon.
HUMOR OFF
Thinking on it more I think it is termed the US Gallon (Gallon US).

It would have been so nice if we had just done the right thing several decades ago and switched to Metric. One gram of water = 1 cc = 1 ml all at STP of course.

Dan Bentler

Yep all cool and Mars Probes wont crash (Mtrs/Second) Feet/Sec.

Have a great day Dan

Hi
Water weighs 8.34 lbs/gal. This is at STP. There are 7.48 gal/cu.ft. SpGr. of water is 1.0 at STP. This info comes from the AWWA and is referenced when testing for certifications. I worked at a water utility for 11 years as an industrial electrician and we had to have all those certs. I know, a zombie thread, but I wanted something to do.

This was 9 years ago
I bet it’s working by now

You have no work in Detroit?

JRW said:

This was 9 years ago
I bet it’s working by now

You have no work in Detroit?

Click to expand...

I may have mentioned that it was a zombie thread. I like water math and I saw the title to the thread.
Yes, lots of work here.

I’m just busting your chops
You said “but I wanted something to do”..

JRW said:

I’m just busting your chops
You said “but I wanted something to do”..

Click to expand...

I know. I like this forum.

Multiplying by unity

1g water = 1 cm**3 water <== at 4degC and 1atm, IIRC
2.54cm = 1 in(ch)
231in**3 = 1usgal <== this used to be exact, but is still pretty close
2.20462lb = 1kg = 1000g

so

1 = 1 g cm**-3
1 = 2.54 cm in**-1
1 = 231in**3 usgal**-1
1 = .00220462 lb g**-1

multiplying 1 by 1 by 1-cubed (1) by 1:

1 = (1 g cm**-3) * (.00220462 lb g**-1) * ((2.54cm/in)**3) * (231 in**3 gal**-1)

= 1 * 2.54**3 * 231 * .00220462 lb g g**-1 cm**-3 cm**3 in**-3 in**3 usgal**-1

(g g**-1), (cm**-3 cm**3), and (in**-3 in**3) all cancel out, leaving

1 = 8.345 lb/usgal

Zombie thread, I know, but also

Rob S. said:

For example , I am taking 32 TPH *2000= 64,000 lbs an hour. I am taking 64,000 *.02 ( for 2%)and determining that 1,280 lbs of this weight is water. We make our product at about 10% moisture , so the operator would select an additional 8% of water that would be an additional 5,120 lbs of water per hour.

Click to expand...

if 2% (water/(dirt+water)) of 64k (dirt + water) 1 1.28k water, then 62.72k (= 64k-1.28k) is dirt, so to get 10% moisture i.e. 90% dirt requires 62.72k dirt * 10%/90% (water/dirt) = 6.969k moisture, less the 1.28k moisture already there, which means 5.689k water needs to be added, so that 5.12k is off by over 11%, but the moisture content would be about 9.2% instead of 10%


jes' sayin'