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 itOuch, thata terrible LPW on the spectrum king
Cheers
Mark
yes not great but this is system lumens not raw led lumens, everything you hang off a led will drag on itOuch, thata terrible LPW on the spectrum king
@PurpleBuz @BOBBY_G do you guys like his design with the copper pipe, or do you think a water block would be better.
I am imagining and brainstorming some designs for my new garden on my property. I feel like chillers that use 350-700 watts is counter productive to the LED philosophy. But what about earth loops? What do you guys think about using copper only to interface with the heatsinks, then coupling into PEX line which is dirt ass cheap, then running a pig tail loop through the earth to remove the heat.
-this is the concept behind geothermal HVAC units.
@DISTRESS0R well, I like to keep an open mind about new products. Lumileds are not really impressive on paper, especially when some cxb3590 users are getting 2.6-2.7 µmol/J .
If all of these smaller diodes are inferior to the COBs we love and use, why are most of the manufacturers moving to these small diode package light engines.
Examples:
-Spectrum King : closet case & mother's little helper, possibly their new SK600+
-Fluence Bioengineering's : Razr, Vypr, SpydrX
-NextLight
Is this just a cost of manufacturing choice?
View attachment 3693666
Most commercial facilities, let alone apartment dwellers and those who don't own their homes will find geothermal options inaccessible, nevermind very expensive.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
with the right climate and low heat loads like led its prob more efficient than that. circ pump and MAYBE a fan.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?
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.@PurpleBuz @BOBBY_G do you guys like his design with the copper pipe, or do you think a water block would be better.
Depends on how they are used. I use them currently.peltiers arent all that efficient, weve discussed them here before
All a peltier does is to move heat from one side to the other side. The "other side" still needs to be cooled.Depends on how they are used. I use them currently.
SK?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..
SK - spectrum kingSK?
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.
I currently use one for a chiller with a waterblock and heatsink for a 12 site rdwc and arduinoAll 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.
ok gotcha that's different than trying to cool the led itself.I currently use one for a chiller with a waterblock and heatsink for a 12 site rdwc and arduino
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.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.
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 canopySK?
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.
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.Depends on how they are used. I use them currently.