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Optimization Strategies for Thermo-Cooler Controller Efficiency and Performance

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This document outlines key insights from a debrief regarding the Thermo-Cooler Controller project led by Kiefer, Mary, Molly, and Sam. The discussions focused on optimizing time and power efficiency, with a goal of ±1K performance. Notable points include transitioning from linear to DC-DC converters, emphasizing electrical noise reduction, enhancing the longevity of thermoelectric coolers (TECs), and key component recommendations like thermistors and thermocouples. A detailed examination of signal processing and necessary assignments is also presented to ensure effective thermal management.

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Optimization Strategies for Thermo-Cooler Controller Efficiency and Performance

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Presentation Transcript

  1. Thermo-Cooler Controller Kiefer, Mary, Molly, Sam

  2. Debrief from Telecom (Highlights) • What we got clarified: • Time Efficiency > Power Efficiency • +/-.1K = goal • Purchase own TEC • Don’t worry about cOpper plate/radiator • Background Info • Previous/Common Solution = Linear Controller • Marlow Literature • DC  DC converters have ~85% efficiency

  3. Debrief from Telecom (Highlights) • What’s important? • Minimize electrical noise • Longevity of TEC • Time efficiency • Power efficiency • What’s added bonus? • Electrical components that can operate in vacuum • Copper plate/radiator operation

  4. Temporary TEC and stuff • 3-stage TEC-- $45.50 + $2.60 potting/sealing • Potting/sealing  water resistance • Goes down to 217K (not 200K) • Minimum Order -- $85

  5. Temporary TEC and stuff (cont.) • Thermistors only go to 233K (not low enough) • K-type thermocouple temperature meter--$45 • Problems: • Reads temp down to 223K (TEC goes down to 217K) • +/- 3°C error on temp readings under 273K • Thermocouple wire--$24.70 • Do we need this (vacuum testing)? • Thermal paste--$14.50 • To attach temp measure to TEC cold side • Total- $132.30

  6. Our system 12 V Signal 12V DC ‘Actual’ SW Outputs the signal we want Can we do this with a passive RC filter? Smooths and reduces the signal down to 7V Active(?) Filter Cool detector to 200K (+/-.1K) TEC

  7. Current Assignments • Research the signals we want to input • Pulse frequency • Differences between pulses • Look into RC filter • Can we reduce/smooth 12V  7V with passive filter? What does it require? • Expand model of TEC • PERT chart

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