Achilles Tang Posted January 24, 2004 Share Posted January 24, 2004 Do your best to reduce heat transfer into your tank. We're living in the tropics... AT Quote Link to comment Share on other sites More sharing options...
SRC Member planetg Posted January 24, 2004 SRC Member Share Posted January 24, 2004 use a proper digital thermometer and measure the input and output of chiller. it shd give you ard 1.6-2 degrees difference. else your flowrate might be incorrect. Quote Link to comment Share on other sites More sharing options...
Achilles Tang Posted January 25, 2004 Share Posted January 25, 2004 Big pumps with high water outputs can raise your tank by 2 - 3C if used inside the water. Most of us who keep SPS have our pumps outside the tank. And we switched to air-cooled pumps instead of water-cooled pumps... Quote Link to comment Share on other sites More sharing options...
weileong Posted January 26, 2004 Author Share Posted January 26, 2004 After many suggestion and consideration here's what I've done. Raise MH from 3" to 5" from water surface. This is the max acceptable height without causing too much glare when looking at the tank. AT-106 (85W) return pump is turned off. Oceanfree 9000 (80W) for skimmer is turned off. Only pump running is 2x 6010 tunze streams and 1260 (used externally) driving the chiller output back to tank (now acting as only return pump). Time Chiller Temp 2x36W PL running 08:16 25.0 Compressor OFF 11:45 25.2 2x250W MH ON 2x36W PL OFF 14:12 26.5 Compressor ON 14:16 26.6 14:20 26.7 15:13 26.6 15:20 25.5 15:28 26.4 15:35 26.3 15:42 26.2 15:50 26.1 15:57 26.0 16:07 25.9 recording was interrupted for 23mins hence no data avaliable 16:30 25.6 16:41 25.5 16:49 25.4 16:58 25.3 17:07 25.2 17:17 25.1 17:26 25.0 Compressor OFF 17:29 24.9 17:31 24.8 17:36 24.7 With 2x250W MH Time taken to cool 1.8 degs = 3hrs 14min With 2x36W PL Time taken to raise 1.6 degs = 5hr 56min This is big difference compared to the earlier test conducted with the other 2 high powered pump running. Judging from this improved results the estimated chiller run time per 24 hr would drop by abt 3-4hrs but only can confirm after the whole test period of 24hrs is completed. To be continued....... Quote Weileong's 4ft tank Part I Weileong's 4ft tank Part II Link to comment Share on other sites More sharing options...
SRC Member Tanzy Posted January 26, 2004 SRC Member Share Posted January 26, 2004 Big pumps with high water outputs can raise your tank by 2 - 3C if used inside the water. Most of us who keep SPS have our pumps outside the tank. And we switched to air-cooled pumps instead of water-cooled pumps... That is so true. When I'm making fresh saltwater. I'll leave my 1262 running overnight in the 100L Toyogo tub. The cover will be closed to reduce salt spray. By morning the water temperature will be a balmy 34°C!!! Quote Warning: Heavy handed moderator in operation. Threads and post are liable to be deleted or moved without prior notification. Moderator's prerogative will be enforced. Any grievances or complains should be addressed to The Administrator. http://www.sgreefclub.com/forum/uploads/post-36-1073276974.gif Link to comment Share on other sites More sharing options...
weileong Posted January 26, 2004 Author Share Posted January 26, 2004 eheim pumps are not so warm! Try those china made pumps and you'll know Quote Weileong's 4ft tank Part I Weileong's 4ft tank Part II Link to comment Share on other sites More sharing options...
weileong Posted January 26, 2004 Author Share Posted January 26, 2004 Part 3. Time Chiller temp 21:15 26.5 Compressor ON 21:19 26.6 21:22 26.7 21:28 26.8 recording stop 2x250MH Off 22:43 26.0 22:46 25.9 22:51 25.8 22:57 25.7 23:02 25.6 23:08 25.5 23:13 25.4 23:18 25.3 23:24 25.2 23:30 25.1 23:35 25.0 Compressor OFF 23:38 24.9 23:39 24.8 23:42 24.7 23:46 24.6 Tme taken to chill 1.9 degs = 2hrs 20min Based on part 2 test earlier today it should take abt 6hrs+ before the compressor will run again. Remember in part 2, there is 2 hrs after the 2x250W MH turns on before the temp raised up to 26.5degs (compressor kicks in). Combined with the results from part 2 test we get. Run time of 3hrs 14min (part 2) + 2hrs 20mins (part 3) = 5 hrs 34mins. So without the 2 submersed pumps we cut the run time needed by 4hrs. Quite a lot of difference! This is almost like 50% difference. I've to start my skimmer running so have to end the test but this is a good indication of how much heat($$$$$$) those pumps throw into the water. I know that pumps introduce heat but didn't know it makes so much difference!!! Quote Weileong's 4ft tank Part I Weileong's 4ft tank Part II Link to comment Share on other sites More sharing options...
Achilles Tang Posted January 26, 2004 Share Posted January 26, 2004 Wait till you try not switching on your MHs! I guess your test results should be good enough for someone who can benchmark against with similar system specs & volume. Because every tank is different... it will be hard to generalise how a chiller will perform in another setup. So what's your personal conclusion to this test? Quote Link to comment Share on other sites More sharing options...
weileong Posted January 26, 2004 Author Share Posted January 26, 2004 actually if you read part2 that is without the MH running it takes abt 6 hrs to raise the temp 1.8 degs. I think I do not need further test anymore after I see the results today. Once again confirm the chiller is great Guess I did made the right decision afterall. I also glad I did this test else I still "sleeping" thinking everything is good. But now I know if not end of the month the electical bills come I will cry. Quote Weileong's 4ft tank Part I Weileong's 4ft tank Part II Link to comment Share on other sites More sharing options...
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