High resolution local heat transfer and pressure drop infrared measurements of two-phase flow of R245fa within a compact plate heat exchanger

Amalfi, Raffaele L.; Thome, John R.; Solotych, Valentin; Kim, Jungho

doi:10.1016/j.ijheatmasstransfer.2016.07.060

Cited by 17 publications

(1 citation statement)

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“…The camera can provide direct temperature read-outs for all pixels within the view by relying on the objects’ thermal emissivity. While high-speed , or high-accuracy − IR cameras are commonly used in heat transfer studies, its working principle suggests that it is impossible for the camera to make measurements behind a hotter or opaque object. The fact that common liquids like water are semitransparent to infrared radiation and that the absorption of the radiation in water is even higher when bubbles are involved suggests that IR camera can only provide trustworthy temperature readings on solid surfaces.…”

Section: Introductionmentioning

confidence: 99%

Development of Perovskite Quantum Dots for Two-Dimensional Temperature Sensors

Zhu

Buitenhuis

Förster

et al. 2023

ACS Appl. Nano Mater.

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In situ temperature measurement for closed systems is always challenging due to various physical limitations. With the aim to visualize the heat transfer phenomena in situ continuously with a longer time scale, octylamine substituted CsPbBr3 perovskite quantum dots (QDs) are synthesized, leading to its thermo-sensitity being doubled. An optical-based 2D temperature sensor based on these ligand-modified QDs is developed, targeting microreactors and other circumstances where conventional thermal sensing protocols are not applicable. The developed method has the advantages of repeatability, long lifetime, low cost, fast response time, and broader applicability since it does not require IR transparent substrates. On top of these advantages, the proposed method also provides satisfactory spatial and temporal resolution, which is typically limited by the camera’s specification rather than the materials.

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