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27-02-2006, 03:37 PM | #31 | |
Senior Dragon
Join Date: Jul 2004
Posts: 4,136
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Cannot lah, this is passive cooler cannot cool below ambience temperature. If such works, our fridge will be just fans and meta blocks. Cooling CPU is a different matter, it is cooling above ambience temperature. |
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01-03-2006, 06:36 PM | #32 |
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Just DIY
Just completed .....
Wonder how low it can cold a 1.5ft.... peltier is 75watt only.. any bro can help me to calculate the lowest it can cold? Last edited by jojoe cute; 10-06-2006 at 10:50 PM. |
01-03-2006, 07:21 PM | #33 | |
Arofanatic
Join Date: Feb 2004
Posts: 128
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Your probe is aluminmium also ? |
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01-03-2006, 07:32 PM | #34 | |
Senior Dragon
Join Date: Jul 2004
Posts: 4,136
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What's the ambient temperature? It play an important part. Also what is the heat resistance of the heatsink and fan assembly? Without that cannot accurate calculate the expected temperature it can acheieve. |
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01-03-2006, 07:55 PM | #35 | |
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Now i don't have small tank to test water cold to wat oC...
Yes the probe is aluminium too... Quote:
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01-03-2006, 07:57 PM | #36 | |
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Let say room temp at 27oC....
Fan is 0.4A Quote:
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01-03-2006, 08:05 PM | #37 | |
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Join Date: Jul 2004
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For calculation, 38W of cooling power is used, that is a reasonable expectation of cooling power from a 75W peltier. It is expected to cool a standard 1.5 tank from ambient 30C to 27.3C, with 100% of the time running at electrical power of 75W. It is expected to cool a standard 1.5 tank from ambient 29C to 26.3C, with 100% of the time running at electrical power of 75W. It is expected to cool a standard 1.5 tank from ambient 29C to 26.6C with 5W of heat introduced by lamp and filter, with 100% of the time running at electrical power of 75W. Above calculation is done with assumption that the heatsink and fan assembly can handle the heat sufficiently. Last edited by silane; 01-03-2006 at 08:18 PM. |
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01-03-2006, 11:37 PM | #38 | |
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cheers xtrekker Last edited by xtrekker; 01-03-2006 at 11:44 PM. |
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01-03-2006, 11:40 PM | #39 | |
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Looking at 24-25 is more then enough....
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01-03-2006, 11:44 PM | #40 | |
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coz my room temperature is abt 31 to 32 degree celsius Last edited by Arrowana17; 01-03-2006 at 11:51 PM. |
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