geothermal help
- Thread starter bobafet1
- Start date
bobafet1
Active member
I originally had the Dart hooked up on the CL but it hardly moved the water. My tank is 8' feet long and so I had the piping set up to move the water down the tank then back up in a circular motion...
http://reefcentral.com/gallery/data/500/21211closed_loop.jpg
http://reefcentral.com/gallery/data/500/21211aquascaping.jpg
http://reefcentral.com/gallery/data/500/21211closed_loop.jpg
http://reefcentral.com/gallery/data/500/21211aquascaping.jpg
Aquaduck
New member
How do you figure that? At zero head the Dart is 3600gph and the Hammerhead is 6000gph.
<a href=showthread.php?s=&postid=7884879#post7884879 target=_blank>Originally posted</a> by ChemE
9 feet of PVC is probably a 300% safety factor; good work.
For a closed loop the Dart CRUSHES the Hammerhead! Check out the pump curves for yourself...
Sequence Dart
Sequence Hammerhead
ChemE
New member
As my major professor always said "life is meaningless without per!"
Because at zero head the Dart is moving 3600 gph with 140 watts (25.71 g/h·w) while the Hammerhead can muster on 6000 gph with 370 watts (16.22 g/h·w)
Yeah the Hammerhead moves more water than the Dart but it also sucks on the wall socket like a leech.
For comparision purposes my Maxi-Stream 1200 spinning the Dumas 3004 (1.75" high pitch propeller) moves around 3,000 gph and draws 18 watts (166.7 g/h·w)
bobafet1
Active member
Alright, so I was able to dig down another foot deeper and the temp reading is at 75F....thats not much of a difference for another foot. Maybe I should try to just maintain my temp at 80F instead of 78F...Im gonna dig some more today and see if I can get the temp any lower... Im running out of places to throw the dirt....Also, I will be laying concrete over the geothermal area for my patio. I wonder if this will help keep the ground cooler.
ChemE
New member
So based on our limited data set, the ground temp is dropping around 2F/foot. Let me run some numbers and give you a few different scenarios. I'll assume this 2F/ft gradient for the calculations and perhaps you can add another data point or two if you find extra space to toss the soil.
bobafet1
Active member
yeah, that maxi jet mod does sound cool...im a bit hesitant on having power heads in my tank though..i would hate to have to replace them when they crap out or adjust them every so often. I think Im just gonna get two darts and run them on a parallel set up...one will be on constantly and when the lights kick on the other will start as well...
bobafet1
Active member
ok, its been some time but I didnt need to use the geothermal loop cause my fans have been doing a great job..but, now that the temp is hot the fans have been staying on all day and so Im revisiting the geothermal idea since I already installed the system. I set up the loop with a quiet one pump now and so Im not sure how long it would take to cool the water down..anyone have any info or advice?
