karimwassef
Active member
Patrick. Sounds good. I'd love to come help and learn.
Temperature extremes on the reef
- Thread starter karimwassef
- Start date
When I get this 1500 gallon tank buried deeply in the ground, it will support 450G of Rubbermade tanks buried in ground and one 150G seaweed tumble culture tank. I will use utube monitoring to determine future heat exchange capabilities to increase above ground system size.
Considering all the discussions that we have done on Cryptic sponges, I think that my below ground 1500G sump will have beaucoup sponges.
I am presently discussing an inorganic nutrient cocktail with the Director of Algae Culture Collection, with the Department of Molecular Biosciences.
http://nsgl.gso.uri.edu/nhu/nhuh14001.pdf
This publication is cultivation Handbook for New England and list a nutrient formula. It seems to me that a concentrated phytoplankton fertilizer would be less complicated than what the New England macro growers are doing.
Considering all the discussions that we have done on Cryptic sponges, I think that my below ground 1500G sump will have beaucoup sponges.
I am presently discussing an inorganic nutrient cocktail with the Director of Algae Culture Collection, with the Department of Molecular Biosciences.
http://nsgl.gso.uri.edu/nhu/nhuh14001.pdf
This publication is cultivation Handbook for New England and list a nutrient formula. It seems to me that a concentrated phytoplankton fertilizer would be less complicated than what the New England macro growers are doing.
Karim,
I need all the help I can get. I just did hire a high school apprentice. Interesting family history as the family left New Orleans after Katrina and moved to Bacliff on Galveston Bay. With both parents working as RN’s, they took two years to outfit a 50’ sailboat, then the family of five sailed the Caribbean for three years.
My body can not keep up with the things that I would like to do here. I hope the energy of a high school senior can boost my production output.
When I told Professor Samocha I would sell individual shrimp between $.50 and $1 each, I thought he was going to choke.
https://m.youtube.com/watch?v=w2DTcrYwppE
https://www.livebrineshrimp.com/ShrimpJanitor.htm
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Karim,
I just remembered something about earth coupled heat pumps in which vertical 2” well is drilled and casing is capped on the bottom. This becomes a tube and shell heat exchanger in which water is pumped down a 1/2” pipe then back up in the annulus between exterior of 1/2” and interior of 2”. Each 100’ equals 1 ton of heat exchange: 12,500 BTU/Hr. It works best if your ground water is close to surface. Water conducts heat much better than earth. I lived in the recharge zone for the Chicot Reservoir with numerous spring feed creeks that were in the mid 60’s. The 1 ton per 100’ was documented in dry ground.
I just remembered something about earth coupled heat pumps in which vertical 2” well is drilled and casing is capped on the bottom. This becomes a tube and shell heat exchanger in which water is pumped down a 1/2” pipe then back up in the annulus between exterior of 1/2” and interior of 2”. Each 100’ equals 1 ton of heat exchange: 12,500 BTU/Hr. It works best if your ground water is close to surface. Water conducts heat much better than earth. I lived in the recharge zone for the Chicot Reservoir with numerous spring feed creeks that were in the mid 60’s. The 1 ton per 100’ was documented in dry ground.
I will try one thing here before paying for labor to bury 1500G tank. If I use ground water at 78 degrees(I know, that is warm coming from 1000’ down) and run it thru 1000’ of 1/2” bundled irrigation hose submerged in Rubbermade tanks I will be trying to warm 60 degree water. BTU heat transfer relies on temperature difference of two medians.
So if 1GPM flow was changed 10 degrees then, 1 GPM times 60 minutes per hour times 8.34 lbs per gallondegress then BTU per hour removed is 5004 BTU / Hr. With 12,500 BTU/Hr equal to a ton which equals 1 HP which is .745KW / Hr
Previously flowtested with volt meters and water meters, water from 1000’ down in the Trinity Aquifer cost me $0.28 per 1000G pumped. So, 60 gallons of water removed 5000 BTU of heat which would have cost a resistive heater at $0.10 per KWHr the ratio of
5000 divided by 12,500 equals $0.04 to add 5000 BTU with resistive heat.
How much to pump 1GPM of water for one hour with a 10 degree temperature difference to add same BTU as electric heater. If 1000G cost $0.28, then 60G cost equals $0.0168 at about 40% cost of resistive heat. I will get some help with lifting 1000’ hose bundle full of water.
So if 1GPM flow was changed 10 degrees then, 1 GPM times 60 minutes per hour times 8.34 lbs per gallondegress then BTU per hour removed is 5004 BTU / Hr. With 12,500 BTU/Hr equal to a ton which equals 1 HP which is .745KW / Hr
Previously flowtested with volt meters and water meters, water from 1000’ down in the Trinity Aquifer cost me $0.28 per 1000G pumped. So, 60 gallons of water removed 5000 BTU of heat which would have cost a resistive heater at $0.10 per KWHr the ratio of
5000 divided by 12,500 equals $0.04 to add 5000 BTU with resistive heat.
How much to pump 1GPM of water for one hour with a 10 degree temperature difference to add same BTU as electric heater. If 1000G cost $0.28, then 60G cost equals $0.0168 at about 40% cost of resistive heat. I will get some help with lifting 1000’ hose bundle full of water.
karimwassef
Active member
I was only planning on going down 10' for my future greenhouse so I didn't spend much time calculating the cost to run the pumps. I see three mechanisms for geothermal... deep well pipe, underground reservoir, or shallow heat exchange pipes. I'm going with the pipes.
This weekend is another freezing snap. We'll see what that does in a couple of days. I'm seeing the bleached white corals turning brown so I'm assuming it's algae or bacteria. I'll take some close ups when I can.
Unfortunately, my ATO reservoir that feeds my kalk reactor has a sensor that failed in the extreme cold. I've had to turn the water supply off so the pH is fluctuating again. When I designed the system, I really didn't anticipate this many consecutive days of freeze and repeated freeze events too. What a winter!
This weekend is another freezing snap. We'll see what that does in a couple of days. I'm seeing the bleached white corals turning brown so I'm assuming it's algae or bacteria. I'll take some close ups when I can.
Unfortunately, my ATO reservoir that feeds my kalk reactor has a sensor that failed in the extreme cold. I've had to turn the water supply off so the pH is fluctuating again. When I designed the system, I really didn't anticipate this many consecutive days of freeze and repeated freeze events too. What a winter!
Labor bid to bury 1500G tank was $2700. I can not justify this expense without knowing the btu exchange rate to recover money. In the Edwards Plateau, limestone shelf is near the surface making excavation expensive.
Considering your future 10’ deep geothermal loop, do you know the ground temperature at 10’ deep. For my money, I would be interested in using a ditch witch narrow 6” trench as deep as possible and use 4” pvc thin wall pipe.
Considering your future 10’ deep geothermal loop, do you know the ground temperature at 10’ deep. For my money, I would be interested in using a ditch witch narrow 6” trench as deep as possible and use 4” pvc thin wall pipe.
Doing some research on ground temperatures in Central Texas: Dallas at 68 degrees, Houston & Austin at 71 degrees.
Considering that winter is almost over, I will initiate shrimp & macro co-culture in April. Evaporative cooling has never been a problem to maintain 80 degrees in 100+ degree days.
Considering that winter is almost over, I will initiate shrimp & macro co-culture in April. Evaporative cooling has never been a problem to maintain 80 degrees in 100+ degree days.
Kevin Guthrie
Member
Innerspace Cavern says their temp is 72. If you go deep enough this will not change seasonally. I think what you want is surface area, not bulk, so piping would be better than reservoir because it will continue to help all during the summer and winter months, not just to even out the daily swings.
Not sure it is a good idea to run your reef water thru underground pipes directly because the pipes will eventually get occluded with growth. Better to pump it thru pipes or tubing in your tanks for heat exchange their.
Not sure it is a good idea to run your reef water thru underground pipes directly because the pipes will eventually get occluded with growth. Better to pump it thru pipes or tubing in your tanks for heat exchange their.
Biological fouling is an important consideration for heat exchange. For my situation, with a 5HP well at 900', I can pump 77 degree water thru 1000' of 1/2" irrigation coiled tubing. Adding btu with water well pump cost 1/3 of resistive heating.
In my home, I just installed a ductless heat pump at a 20.5 SEER, meaning I get 20 times the btu than with resistive heat. Economics tells that if my operation was big enough, I should buy a heat pump.
For certain you are right about losing geothermal conductivity with system water pumped thru ground loop because of bio-fowling on inside diameter from system water. However, you will loose heat transfer on the other end with biofouling on outside of geothermal cooling coil loop in system water. So, have a mechanism to keep it clean. Best to be able to remove and pressure wash off debris.
karimwassef
Active member
Y plan was to use large diameter pipes ~ 2" and have a system disconnect that allows me to take the ground loop completely offline once a year to purge with acid then borax....
