2023年10月28日 · However, some things get more noisy or leak more current at high temperatures, so I’m wondering about using a Peltier / Thermo Electric Cooler / TEC to make a chilled box. Maybe even getting really fancy with a stacked TEC to get all the way to -40C (for a very very small box and minimal electrical load inside).

2022年2月17日 · And, if I size the resistor properly I can better-match the heating and cooling rates (the TEC is a much better heater than it is a cooler, so tuning the control loop is more of a hassle). I hope I can find my notes showing how much current the TEC drew, but I do have temperature-change rate curves so I can always work from those.

2018年3月3日 · With a two stage cooler the lower temperature TEC should be considerably smaller (e.g. 1/4-1/10 the size). Depending on the power of the circuit there is an optimum size of the TEC elements: much larger ones will need much more power, as much of the power is needed to overcome internal heat flow and I2R power loss.

2016年10月11日 · Hi everyone, this is just a free thought of mine. As you know, Mid-wave Infrared cameras offer better spectral resolution, longer detection range, and lower NETD than LWIR ones. But until today, all MWIR cameras still need deep cooling system for the sensor, maybe down to about 77 kelvin I think, such design makes MWIR cameras bigger, power hungry, expensive, slow to start, and nee

2017年1月21日 · The TEC itself can heat / cool in seconds. The rather high thermal conductivity across the TEC is one weakness, as it gives an easy way for external changes to the regulated side. Using also a sensor for the outer side of the TEC allows for accurate control, as one already measures the main path of external disturbance.

2021年4月29日 · An Advantest R6581T DVM is operating inside the TEC chamber, so the TEC cooler is always in cooling mode in order to take out the power dissipation of the DVM. During the data taking period of several days the inner temperature sensor of the DVM was 38.5 +/- 0.1 °C while ambient temperature varied. The TEC cooler runs at voltages of up to 7 V.

2023年10月9日 · In our limited use the TEC just "saw" either a slowly varying DC type voltage (analog closed loop), or On/Off pulsed (very slow cycle time) with a slow (many seconds) temperature ramp up down (limit cycle bang bang servo for chiller).

2016年5月11日 · since he only needs 1 watt of cooling it can be done with the guts from an office water cooler. may need to replace the R-134A with propane, if you can get real propane that boils at -40C. the stuff i can get here boils at -30C because its mixed with butane. it is probably impossible to get to -50 C with an unmodified office fridge cooler. you ...

2022年1月30日 · After a quick test run, I've ran TEC cooler with trusty Keithley 2510 a bit and it went down to +4.7ish C with 25W cooling. Then after 1 hour it went to +50.0 and settled there with +11W heating. This was without good seal on front door, so I hope can imporove numbers a bit after more tuning.

2018年5月20日 · TEC coolers have quite some thermal conductivity and thus are not easy to reach very stable temperature. Also power consumption tends to be much higher - so that battery power is not that practical anymore. When it comes to lower noise, just using a 2nd LTZ1000 is not that complicated compared to a TEC cooler and still lower power and lower noise.