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Les · 09-25-2003, 02:07 PM

All
I apologise for my non-constructive comments.

Bill,
I guess you are defining "key to chiller performance"as the Temp difference between inlet and outlet?

Dunno but have done some rough sums:
2x172w Peltier at 19v
2x wbs C/W~ 0.05 (40x40mm Heat source)
1 Cold chamber wb C/W~ 0.025 (Two(2) 40x40mm Heat sources)
2 x Radiators each with C/W~ 0.06
Insulated to same standard as Simulator Heat Die C/W~ 15

Kryotherm suggests that the 2 Peltiers can maintain a 25c differential between Hot Water and Cold Object whilst extracting ~ 140Watt .
Extraction of 140Watt will cool water ~10c at a flow rate of 0.2lpm.
This will dump ~500Watt in the Hot Water (140Watt + Peltier va (358Watt) + Insulation leaks(2Watt)) giving a Hot water Temp ~15c above Ambient.
So I guess the above Chiller would be capable of cooling ambient water to ~10c below ambient at a Flow Rate of 0.2LPM.

09-25-2003, 02:07 PM	#94
Les Cooling Savant Join Date: Oct 2001 Location: Wigan UK Posts: 929	All I apologise for my non-constructive comments. Bill, I guess you are defining "key to chiller performance"as the Temp difference between inlet and outlet? Dunno but have done some rough sums: 2x172w Peltier at 19v 2x wbs C/W~ 0.05 (40x40mm Heat source) 1 Cold chamber wb C/W~ 0.025 (Two(2) 40x40mm Heat sources) 2 x Radiators each with C/W~ 0.06 Insulated to same standard as Simulator Heat Die C/W~ 15 Kryotherm suggests that the 2 Peltiers can maintain a 25c differential between Hot Water and Cold Object whilst extracting ~ 140Watt . Extraction of 140Watt will cool water ~10c at a flow rate of 0.2lpm. This will dump ~500Watt in the Hot Water (140Watt + Peltier va (358Watt) + Insulation leaks(2Watt)) giving a Hot water Temp ~15c above Ambient. So I guess the above Chiller would be capable of cooling ambient water to ~10c below ambient at a Flow Rate of 0.2LPM.