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An Idea (1 Viewer)
- Thread starter FireEater
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Niko5
Guest
Wow... thats... complete hehe howed you get all of that? 
Niko5
Guest
Ohhh well nifty... we should publish taht info somewhere its good to know...
So basicaly waht you come out with is its better to remove x amount or water before you replace x amount of water right?
So basicaly waht you come out with is its better to remove x amount or water before you replace x amount of water right?
I wouldn't say it is better. If the cost of using more fresh salt water is less in your mind than the convenience of this type of water change, they can both be done just as effectively. One just requires more water than the other.
Trey
Trey
G
Guest
Hey Trey, could you send me your equations? Just curious, my friend and I were trying to set them up.
What program did you end up using?
Another way to plumb it guys is to have a seprate holding tank in your system, that is attached, and at the same time can be taken off line, and hook a drainage hose to that, and a refill hose, so that you could take it off line, drain, refill and then put it back on line. Mr Wiess (sp?) is suppose to have soemthing like this for his tank.
What program did you end up using?
Another way to plumb it guys is to have a seprate holding tank in your system, that is attached, and at the same time can be taken off line, and hook a drainage hose to that, and a refill hose, so that you could take it off line, drain, refill and then put it back on line. Mr Wiess (sp?) is suppose to have soemthing like this for his tank.
Hello Nathan,
It's not quite as simple as sending the equations. I used a chemical process modeling package. It is not readily available unless you have a bunch of money to drop on it. The equation that makes it challenging at all is the mass balance equation for a continuous stirred tank. It is differential and requires a significant iterative solver to solve well. If you really want the equations, I can write them out for you at a meeting or the frag swap.
As for a holding tank, etc. It can certainly be done. It is just a matter of time and money. If I were wanting a auto water change system, I would probably just take the loss on the fresh salt water. For a 100 gallon system as discussed in the example I gave, and ignoring what the RO/DI water costs, the salt requirement for the extra 3 gallons is less than a dollar where I buy my salt.
Later,
Trey
It's not quite as simple as sending the equations. I used a chemical process modeling package. It is not readily available unless you have a bunch of money to drop on it. The equation that makes it challenging at all is the mass balance equation for a continuous stirred tank. It is differential and requires a significant iterative solver to solve well. If you really want the equations, I can write them out for you at a meeting or the frag swap.
As for a holding tank, etc. It can certainly be done. It is just a matter of time and money. If I were wanting a auto water change system, I would probably just take the loss on the fresh salt water. For a 100 gallon system as discussed in the example I gave, and ignoring what the RO/DI water costs, the salt requirement for the extra 3 gallons is less than a dollar where I buy my salt.
Later,
Trey
