Spectrometer Cooling System

[kim.mikhail86]

Hello.

We have a spectrometer in a metal case with size 27/27/27 mm. The ambient temperature for our application will vary from 25 to 80oC. The spectrometer while operating at room temperature can reach temperature 60oC. We need to keep the spectrometer at 25oC.

Your support technician recommended DA-011-05-02-00-00 system.
Could you please recommend a thermoelectric cooling plate(s), a heat sink(s) and a fan as separate units?

[David_1768]

Welcome to the Digi-Key TechForum kim.mikhail86.
Click Here for the thermoelectric assemblies that we have available. If you want to build your own, Click Here for the individual Peltier devices. You will have to decide what size heatsink and fan you require, and they we can look for possible matches.

[rick_1976]

Greetings,

Unfortunately it is not possible to make specific recommendations for thermoelectric cooling systems based on temperatures alone–the power dissipation of your spectrometer and the details of the mechanical system design will have very significant effects.

The resources below discuss the application of thermoelectric systems and thermal modeling in some depth. In my experience, the great majority of those who attempt to use these devices without taking the time to understand the theory and do the math will fail in their efforts, due to the absolutely brutal inefficiency of currently-available devices.

The DA-011-05-02-00-00 device mentioned is a nice example of the sort of product that is available, but will not work in your application. Achieving a net cooling effect of 55°C for a device that dissipates a significant amount of power is not trivial, and may approach the limits of what is possible with a single-stage system. As a rough estimate, I’d expect that a thermoelectric cooling system would consume about 50x the amount of power being supplied to the spectrometer under the conditions mentioned.

Thermoelectric Modules: Device Specifications

This post is one of a series on thermoelectric modules (TEMs, also called Peltier devices) which convert an electrical input directly to a heat pumping effect. Here, basic concepts of temperature and thermal energy are discussed, the general behavior of TEMs described, and a method for modeling device performance mathematically introduced. Subsequent pages show how this information can be used to make calculated system performance estimates, and highlight various other considerations relevant …

Modeling Thermoelectric Systems

This post is part of a series on thermoelectric modules (TEMs), also known as Peltier devices. The prior page explored the basic function of TEMs and a method of describing their behavior mathematically based on information likely to be found in product literature. This page steps through a process of developing a thermal model for a system using a TEM to create a small beverage cooler/refrigerator, showing how different portions of the physical system are modeled, how product information can …

TEM Application Considerations

This page is part of a series on thermoelectric modules (TEMs) also known as Peltier devices. Previous pages in the series discussed the basic function of these components and techniques for modeling and predicting the behaviors of a TEM when used as part of a thermoelectric cooling system. This page covers a number of electrical considerations relevant to the operation of a TEM, and mechanical considerations regarding their installation as part of a thermal system. Electrical Drive Considera…

A thermal management example (part one)

The purpose of this page is to illustrate the process of making basic thermal analysis calculations common in electronics applications, and finding info in product literature that's relevant to that process. For sake of example, we’ll assume that we’ve got an IRL3713 transistor in a TO-220 package attached to an HS278-ND heat sink via a BER183-ND thermal interface pad, looking similar to the model in figure 1. [image] Figure 1. Model of the thermal assembly under consideration. In the conte…

[kim.mikhail86]

Thank you Rick. We managed to decrease the necessary cooling just to 15oC and we will try to use DA-011-05-02-00-00 just for first estimation. Thank you for the resources provided

[kim.mikhail86]

Thank you David