Local Heat Transfer Measurements Within a Representative Plate Heat Exchanger Geometry Using Infrared (Ir) Thermography

Solotych, Valentin; Kim, Jungho; Dessiatoun, Serguei

doi:10.1615/jenhheattransf.2015012408

Cited by 7 publications

(8 citation statements)

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“…The technique used to acquire single-phase local HTC along the corrugated plate was described in detail in Solotych et al [22]. A short summary of this technique, followed by the extensions to two-phase flow and some modifications to the experimental apparatus are discussed below.…”

Section: Experimental Technique and Data Reductionmentioning

confidence: 99%

“…A detailed description of the data reduction is given in Solotych et al [22] where the calculation of the local HTC during single-phase flow was explained. The same technique was used in this study to obtain the local two-phase HTC.…”

Section: Data Reductionmentioning

confidence: 99%

“…As described in Solotych et al [22] the pressure data were obtained using an absolute pressure transducer to measure the saturation pressure close to the inlet of the PHE. A differential pressure transducer combined with four valves were used to measure the pressure 11 drop along the PHE at four locations.…”

Section: Data Reductionmentioning

confidence: 99%

“…The uncertainties of the instruments used in this work are listed in Solotych et al [22]. The overall uncertainty (with 95% confidence) was computed using the method of Taylor [23] and are shown by the error bars on the plots.…”

Section: Test Apparatus Validation and Uncertainty Analysismentioning

confidence: 99%

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Boiling heat transfer and two-phase pressure drops within compact plate heat exchangers: Experiments and flow visualizations

Solotych

Lee

Kim

et al. 2016

International Journal of Heat and Mass Transfer

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Infrared (IR) thermography was used to measure the local heat transfer coefficients within two plate heat exchanger geometries. The chevron patterns were machined into polycarbonate and IR transparent calcium fluoride plates, both of which were electrically heated using flexible film heaters at heat fluxes up to 0.8 W cm-2. The test fluid was a refrigerant (HFE7100) at mass fluxes between 25 and 100 kg m-2 s-1 , and qualities from 0 to 0.9. The apparatus and data reduction technique were validated by comparing the single-phase heat transfer and pressure drop data against the prediction methods from the literature. Adiabatic flow visualizations were conducted to link the flow patterns with the observed heat transfer. The frictional pressure gradient and heat transfer coefficient were compared with available correlations. It was shown that the heat transfer coefficient and the frictional pressure gradient increased with mass flux and quality. The comparison indicated the need for new prediction methods for predicting the local thermalhydraulic performance over a wide range of operating conditions.

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Section: Experimental Technique and Data Reductionmentioning

confidence: 99%

Section: Data Reductionmentioning

confidence: 99%

Section: Data Reductionmentioning

confidence: 99%

Section: Test Apparatus Validation and Uncertainty Analysismentioning

confidence: 99%

See 2 more Smart Citations

Boiling heat transfer and two-phase pressure drops within compact plate heat exchangers: Experiments and flow visualizations

Solotych

Lee

Kim

et al. 2016

International Journal of Heat and Mass Transfer

Self Cite

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“…The temperature and wall heat flux are rarely measured independently. Most commonly, the surface heat flux is estimated based on spatiotemporal temperature measurements 10,[22][23][24][25] with the assistance of numerical modeling to account for conjugate effects 26,27 . Moreover, the fluid temperature is typically measured at large distances from the three-phase-interface (e.g., at the inlet and outlet of a microchannel device) 18 ; or alternatively, it is calculated via numerical methods using an estimated surface heat flux 21 .…”

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confidence: 99%

Transient and local two-phase heat transport at macro-scales to nano-scales

Mehrvand

Putnam

2018

Commun Phys

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Two-phase cooling has become a promising method for improving the sustainability and efficiency of high energy-density and power-density devices. Fundamentally, however, two-phase thermal transport is not well understood for local, transient processes, especially at critical to near-critical heat fluxes at the macro, micro, and nano-scales. Here we report spatiotemporal characterization of the single-bubble ebullition cycle in a hot-spot heating configuration with heat fluxes approaching 3 kW cm −2 . In particular, we experimentally reconstruct the spatiotemporal heat transfer coefficient in terms of its proportionality at both the macro-scale (l >> 1 μm) and the micro-to-nanoscale (l < 1 μm). We show that the maximum rates of heat transfer occur during the microlayer evaporation stage of the ebullition cycle, corresponding to critical maxima in the heat transfer coefficient of~160 ± 40 kW m −2 K −1 and~5300 ± 300 kW m −2 K −1 at the macro-scale and micro-to-nanoscale, respectively.

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Local heat transfer in a microchannel with a pin fin—experimental issues and methods to mitigate

Wang

Nayebzadeh

et al. 2017

International Journal of Heat and Mass Transfer

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Local Heat Transfer Measurements Within a Representative Plate Heat Exchanger Geometry Using Infrared (Ir) Thermography

Cited by 7 publications

References 0 publications

Boiling heat transfer and two-phase pressure drops within compact plate heat exchangers: Experiments and flow visualizations

Boiling heat transfer and two-phase pressure drops within compact plate heat exchangers: Experiments and flow visualizations

Transient and local two-phase heat transport at macro-scales to nano-scales

Local heat transfer in a microchannel with a pin fin—experimental issues and methods to mitigate

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