Another Day, Another “A”

Thermoelectric Cold/Hot Plate Replaces Liquid Nitrogen:

TECA’s cold/hot plates utilize thermoelectric cooling, a solid-state method of heat transfer. Also called the Peltier Effect, this technology is valued for its reliability and lack of maintenance needs. For over a decade, TECA cold/hot plates have been cited in peer-reviewed, published academic research papers. Pictured here is our youngest known researcher, a 7th grade student who designed a physics experiment for her school science fair. TECA could not pass up the opportunity to support a budding scientist and lent our Model AHP-301CPV, free of charge.

thermoelectric cold plate

Lisa, a 7th grader, used the AHP-301CPV in her science fair project, Electric Ice. Following the methods from a paper published in the journal Science, she obtained pyroelectric crystals, which develop an electric field in response to a temperature change. When the pyroelectric crystals are cooled in a controlled manner, their electric field affects the freezing point of the moisture in the air that condenses on them.

Unlike the scientists in the Science paper, Lisa did not have access to large amounts of liquid nitrogen to provide the cooling. Enter TECA Model AHP-301CPV Cold/Hot Plate. The pyroelectric crystals, housed in copper cups, were placed on the cold plate surface. Using the AHP-301CPV’s integral temperature controller and included communications software, Lisa programmed the cooling to ramp down by 2°C per minute, from room temperature to -20°C. A video camera recorded the condensation of the ambient moisture and its subsequent freezing. By comparing the time base of the video with the data captured by the AHP-301CPV’s communications software, Lisa was able to measure the freezing temperature for 3 separate configurations: within a positive electric field, a negative field, and no electric field.

Read moreAnother Day, Another “A”

Controlled Temperature Cycling in a Research Lab

Direct contact cooling 65°C below ambient:

controlled temperature cyclingA large state university in the U.S. has been using a collection of several TECA Model AHP-1200CAS Cascaded Cold/Hot Plates for years, to perform various research on the characteristics of cement paste samples.

In a cascaded system, the thermoelectric element acts as a heat sink for the element above it. Therefore, the more “stages” there are, the colder the top-most stage becomes. The research team which provided this photo successfully ran temperature profiles such as: from -20° to +24°C, and +23° down to -40°. This consistent accuracy and reliability of TECA Cold/Hot Plate products are a smart addition to any lab needing plug-and-play benchtop cooling or heating.

All Laboratory-Style TECA Cold/Hot Plates include an integral temperature controller and tecaLOG communications software. Versatile accessories are available such as cutting surfaces for grossing, barriers for lab animals, and more. The possibilities are endless. Please reach out to us for help selecting the right TECA solution for your lab. Ph 773.342.4900.

Freeze Tape Casting

Freeze Tape Casting Manufacturer:

A materials science company specializes in creating foams with specific porosity for use in electric vehicles, batteries, thermal interface materials and ceramic-metal interfaces. Utilizing a TECA thermoelectric cold plate as a component within the freeze tape caster ensures the manufacturing process remains environmentally friendly. Peltier cold plates use no freon, coolants, or chemicals of any kind. In this example, the customer has slightly modified a commercially-available, off-the-shelf (COTS) TECA cold plate to reach the desired -10C set point.

Read moreFreeze Tape Casting

CONDENSING VAPOR

Condensing Vapor: AHP-470CP in Laboratory Reactor Instrumentation

condensing vapor   cooling vapor stream

In a chemical process (catalysis), the customer uses several TECA Model AHP-470CP Cold Plates to condense methanol out of a vapor stream and collect liquid in the 100 mL glass vessels shown. The AHP-470CP offers a convenient small size and is customizable to the end user’s needs.

Please see the “Options” section on the product data sheet to learn more.

CASCADE COLD PLATE

Cascade Cold Plate:

cascade cold plate cascade cold plate

 

Here’s a step by step of an AHP-1200CAS/CCP-22 Cascade system our engineers were playing with. They took a purple EasySep magnetic nano particle vessel, set it on the cascade, insulated it and then cycled it up and down for kicks. The curve shows the results. Faster times can be achieved by thinning out the plates and building the cascade into the AHP-1200CAS rather than having it as an option.

Talk to TECA engineers if your interested.

FLOW CHEMISTRY / OEM PRODUCT

Flow chemistry/OEM products application:

flow chemistry, cascaded thermoelectric cold plate

A European company specializing in equipment for the continuous flow chemistry market required extreme temperatures for a new product. Integrating a customized version of TECA’s Liquid Cooled Cascaded Cold Plate made the customer’s product possible: they are able to reach temperatures from minus 70 °C to plus 80 °C.

The customer reports that their new continuous flow reactor allows for the use of flow chemistry in many applications, achieving quicker results safely and with better control.

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