Controlling peltier watt usage

SparkedFire · 04-13-2003, 12:44 AM

Is it possible to controll a peltiers watt usage by a 3 way toggle switch, or some other simple cost efective means? I know there are devices that can controll peltier power usage but the temperature range of the sensor is not desireable. The goal is to be able to use pelts, but adjust power usage according to conditions. Example gaming, vs idle ; high cooling, vs low cooling (respectively). I will use a two loop water cooled system with a pelt water cooling device/contraption (similar to the "peltier based water chilling exparament" thread).

[url=http://forums.procooling.com/vbb/showthread.php?s=&threadid=5810]

Please post any ideas or comments here.

RoboTech · 04-14-2003, 10:17 PM

Hey SF,

To control a TECs wattage you just have to adjust the applied voltage - the amps will follow voltage (as voltage increases, so will the current draw). Now doing so with a 3-way switch might not be so easy. You would have to have two power (voltage) sources one high, one low and switch between them.

Another method you can use if you are building a water-chiller with multiple TECs is to switch on 1, 2 or 3 TECs for low, medium and high cooling. I tried this with my two TEC chiller once. One TEC is powered on all the time - basic cooling. I used a temp probe from a DigiDoc5 to monitor CPU waterblock temps and when they exceeded the programmed trip point on that channel of the DigiDoc, the fan output associated with that temp probe turned on. Instead of turning on a fan, the DigiDoc triggered a high current solid state relay which turned on the second TEC power supply - high cooling. You could expand the theme to three TECs or more depending on your goals and budget...

Of course you don't have to use an automated controller (DigiDoc - now that's a strectch) you could just use toggle switches.

Good luck,

SparkedFire · 04-15-2003, 04:06 PM

Hey, thanks RoboTech. I will take this into consideration!

SparkedFire · 04-16-2003, 08:39 PM

just thought about this, but couldn't you use a variable resistor like a volume control dial?

Since87 · 04-16-2003, 09:20 PM

A variable resistor that can take the current draw of a 226 Watt TEC would be enormous, and would dissipate enormous amounts of heat itself.

04-13-2003, 12:44 AM	#1
SparkedFire Cooling Savant Join Date: Apr 2003 Location: The Matrix Posts: 114	Controlling peltier watt usage Is it possible to controll a peltiers watt usage by a 3 way toggle switch, or some other simple cost efective means? I know there are devices that can controll peltier power usage but the temperature range of the sensor is not desireable. The goal is to be able to use pelts, but adjust power usage according to conditions. Example gaming, vs idle ; high cooling, vs low cooling (respectively). I will use a two loop water cooled system with a pelt water cooling device/contraption (similar to the "peltier based water chilling exparament" thread). [url=http://forums.procooling.com/vbb/showthread.php?s=&threadid=5810] Please post any ideas or comments here. __________________ If you smell something odd coming from your puter, panic and run crazy. Shut her down and grab a towel. As to watercooling going mainstream: We are truely dedicated to it, we know everything, and we have perfected it.

04-15-2003, 04:06 PM	#3
SparkedFire Cooling Savant Join Date: Apr 2003 Location: The Matrix Posts: 114	Hey, thanks RoboTech. I will take this into consideration! __________________ If you smell something odd coming from your puter, panic and run crazy. Shut her down and grab a towel. As to watercooling going mainstream: We are truely dedicated to it, we know everything, and we have perfected it.

04-16-2003, 08:39 PM	#4
SparkedFire Cooling Savant Join Date: Apr 2003 Location: The Matrix Posts: 114	just thought about this, but couldn't you use a variable resistor like a volume control dial? __________________ If you smell something odd coming from your puter, panic and run crazy. Shut her down and grab a towel. As to watercooling going mainstream: We are truely dedicated to it, we know everything, and we have perfected it.

04-14-2003, 10:17 PM	#2
RoboTech Cooling Savant Join Date: Sep 2002 Location: Cincinnati, OH Posts: 229	Hey SF, To control a TECs wattage you just have to adjust the applied voltage - the amps will follow voltage (as voltage increases, so will the current draw). Now doing so with a 3-way switch might not be so easy. You would have to have two power (voltage) sources one high, one low and switch between them. Another method you can use if you are building a water-chiller with multiple TECs is to switch on 1, 2 or 3 TECs for low, medium and high cooling. I tried this with my two TEC chiller once. One TEC is powered on all the time - basic cooling. I used a temp probe from a DigiDoc5 to monitor CPU waterblock temps and when they exceeded the programmed trip point on that channel of the DigiDoc, the fan output associated with that temp probe turned on. Instead of turning on a fan, the DigiDoc triggered a high current solid state relay which turned on the second TEC power supply - high cooling. You could expand the theme to three TECs or more depending on your goals and budget... Of course you don't have to use an automated controller (DigiDoc - now that's a strectch) you could just use toggle switches. Good luck,

04-16-2003, 09:20 PM	#5
Since87 Pro/Guru - Uber Mod Join Date: Sep 2002 Location: Indiana Posts: 834	A variable resistor that can take the current draw of a 226 Watt TEC would be enormous, and would dissipate enormous amounts of heat itself.

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