welight
Well-Known Member
yes not great but this is system lumens not raw led lumens, everything you hang off a led will drag on it
Cheers
Mark
chilLED: water cooled, ducted, or active led fixture
Cheers
Mark
BlackD.O.G
Active Member
This concept is cool as hell but what happens if you get a leak? Also in areas that freeze are you going to have to dig below the front line? If so thats a lot of digging. I just wonder how well it would peform over summer and winter months
ttystikk
Well-Known Member
Most commercial facilities, let alone apartment dwellers and those who don't own their homes will find geothermal options inaccessible, nevermind very expensive.
Water chilling, especially once scaled up to cool the entire facility, can be 30% or more efficient than traditional AC. How is this incompatible with the efficiency gains of LED tech?
JorgeGonzales
Well-Known Member
What about passive radiators? I wonder if there's anything adaptable to leds, maybe from the PC world.
Here is ridiculous video of Jay Leno admiring his garage lights:
Most people seem to just be using huge chunks of aluminum, so maybe it isn't that great. Cool idea though.
Here is ridiculous video of Jay Leno admiring his garage lights:
Most people seem to just be using huge chunks of aluminum, so maybe it isn't that great. Cool idea though.
BOBBY_G
Well-Known Member
with the right climate and low heat loads like led its prob more efficient than that. circ pump and MAYBE a fan.
someday well all be heady and have olympic size pools "oh yeah its heated by the garden". but seriously a pex coil in a kiddie pool does great for heat exchanging into a large thermal mass.
Trippyness
Well-Known Member
There is quite a sinple water cooling soloution. Paltier coolers with a water block run to the lights. Power is milimal.
Not sure if I would trust water cooled on all that tech. Leaks of death..
Not sure if I would trust water cooled on all that tech. Leaks of death..
I like this guys system because the system is not 100% dependent on water cooling being well integrated with a basic primary heatsink. It also minimizes water joints, issues with different materials (water cooling is all in copper) and galvanic corrosion. A water block could work better if its custom to fit the light without a whole bunch of pipefittings, and water hose connections. but as bobby pointed out the water has to be 100% separated electrically. I prefer heatpipes and copper heat spreaders to move the heat away from the led faster for a lower junction temperature.
Personally within my own design philosophy I don't think water cooling is the way to go. I prefer to separate HVAC (grow room cooling) from a lamps cooling system. Redundancy, efficiency and greater availability of efficient off the shelf systems that specialize in what they do makes everything easier. Adding water to a light system complicates it exponentially. You have to deal with moisture, hoses or pipes going all over the place. Add on top of the fact that with the latest leds (SMDs or COBS that are on the leading edge of tech) the increase in efficiency has reduced the need for heat extraction to the point where the air flow required for a grow room is dictated by the needs of the plants for moisture control, and co2\O2 air exchange instead of removing excess heat.
Think about your fancy ultra efficient dehuey and realize that grow room air circulation is needed even if a light system doesn't introduce any heat into the grow room.
Groundloops are absolutely great as cooling sink, it can be as simple as burying some black poly irrigation hose below the frost line.
Last edited:
Trippyness
Well-Known Member
Depends on how they are used. I use them currently.
BOBBY_G
Well-Known Member
im sure they can work in any number of ways but by design thermoelectric cooling has very low efficiency
https://en.wikipedia.org/wiki/Thermoelectric_cooling
The primary advantages of a Peltier cooler compared to a vapor-compression refrigerator are its lack of moving parts or circulating liquid, very long life, invulnerability to leaks, small size and flexible shape. Its main disadvantage is high cost and poor power efficiency
https://en.wikipedia.org/wiki/Thermoelectric_cooling
The primary advantages of a Peltier cooler compared to a vapor-compression refrigerator are its lack of moving parts or circulating liquid, very long life, invulnerability to leaks, small size and flexible shape. Its main disadvantage is high cost and poor power efficiency
Herbal_Essence
Well-Known Member
from what i read here in the forum, the popular cxb set up @ 700ma is ~200lm/w
87.9 lm/W for SK seems a joke next to it. yet, people still pull gr\watt with SK as with crees @700ma.
inconsistent kinda..
87.9 lm/W for SK seems a joke next to it. yet, people still pull gr\watt with SK as with crees @700ma.
inconsistent kinda..
All a peltier does is to move heat from one side to the other side. The "other side" still needs to be cooled.
Heat pipes or a copper base plate doesn't use any power to conduct the heat to the other side.
BOBBY_G
Well-Known Member
SK?
700 mA (64% eff) is not nearly as popular as 1400 mA (56%) as you need almost twice the cobs to get that extra efficiency.
Herbal_Essence
Well-Known Member
Trippyness
Well-Known Member
I currently use one for a chiller with a waterblock and heatsink for a 12 site rdwc and arduino
ok gotcha that's different than trying to cool the led itself.
ttystikk
Well-Known Member
Exactly double the chips at $45 each or more, when I looked into it. The extra cost/PAR Watt wasn't worth it to me.
BOBBY_G
Well-Known Member
your typical 172 lm/W @ 1.4A cree setup is losing about 15 lm/W due to driver and another 5-10 with optics/reflectance so it prob would be about 145-155 in the real world on the canopy
ScaryGaryLed
Well-Known Member
somebody make this worth the while, i mean ground loop cooling and what not.. I hope your planning on some serious 20KW LED light system for that to be a concern.
Airwalker16
Well-Known Member
I was very very interested in building a peltier cooler for chilling my RDWC water, until a friend sold me an ecoplus 1/10HP for $150 used once.
But I'm very very interested in seeing what you're doing to utilize peltiers?