Experimental demonstration of a tailored-width microchannel heat exchanger configuration for uniform wall temperature

Riera, Sara; Barrau, Jérôme; Rosell, Joan; Omri, Mohamed; Fréchette, Luc

doi:10.1088/1742-6596/476/1/012075

Cited by 8 publications

(3 citation statements)

References 8 publications

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“…Enhancing thermal uniformity has emerged as a crucial strategy, drawing the attention of various research groups. Barrau et al [13,14] and Riera et al [15][16][17] proposed cooling systems to improve the receiver temperature uniformity by using a hybrid jet impingement/microchannel cooling device that tailors the distribution of its heat extraction capacity to the illumination profile. They demonstrated that this type of cooling device was able to generate a temperature dispersion, quantified as the standard deviation of the temperature, lower than 0.7 K across the entire CPV receiver.…”

Section: Introductionmentioning

confidence: 99%

Impact of DC-DC Converters on the Energy Performance of a Dense Concentrator PV Array under Nonuniform Irradiance and Temperature Profiles

Fernández,

Rosell-Mirmi,

Regany

et al. 2024

Energies

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Efficiency losses resulting from electrical mismatching in densely packed photovoltaic arrays present a significant challenge, particularly exacerbated in nonuniformly illuminated receivers and under varying temperatures. Serial configurations are particularly susceptible to radiation nonuniformities, while parallel systems are negatively affected by temperature variations. Various authors have recommended the incorporation of electrical voltage and current sources to mitigate these losses. This study explores different electrical connection configurations utilizing concentrated photovoltaic (CPV) cells and DC-DC electrical current converters. A self-adaptive microfluidic cell matrix cooling system is employed to mitigate thermal dispersion caused by the highly nonuniform illumination profile. The obtained results for each configuration are compared with the total electrical power produced by individual cells, operating under identical radiation and temperature conditions to those of the entire array. The results reveal a noteworthy increase in production across all studied configurations, with the parallel–series arrangement demonstrating the most promising practical utility. This configuration exhibited a remarkable 50.75% increase in power production compared with the standard series connection.

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Section: Introductionmentioning

confidence: 99%

Impact of DC-DC Converters on the Energy Performance of a Dense Concentrator PV Array under Nonuniform Irradiance and Temperature Profiles

Fernández,

Rosell-Mirmi,

Regany

et al. 2024

Energies

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“…Several million copies of DNA can be generated from a single molecule through only few cycles of PCR. DNA amplification is performed using thermal cycling, with a high degree of control of stable and uniform temperature distribution being attributed to array structures (Bigham et al, 2017;Seo et al, 2018), microchannel heat exchangers (Riera et al, 2013), membrane-based microfluidics (Chen and Shen, 2017), and doped hybrid materials (Seo et al, 2016). In principle, this method can be applied to other taxonomic groups of pathogens (e.g., families, genus, species of viruses, bacteria, and fungi) by designing a broad-range PCR assay (Evertsson et al, 2000).…”

Section: Introductionmentioning

confidence: 99%

Thermally stable and uniform DNA amplification with picosecond laser ablated graphene rapid thermal cycling device

Chen

Chang

et al. 2019

Biosensors and Bioelectronics

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Rapid thermal cycling (RTC) in an on-chip device can perform DNA amplification in vitro through precise thermal control at each step of the polymerase chain reaction (PCR). This study reports a straightforward fabrication technique for patterning an on-chip graphene-based device with hole arrays, in which the mechanism of surface structures can achieve stable and uniform thermal control for the amplification of DNA fragments. A thin-film based PCR device was fabricated using picosecond laser (PS-laser) ablation of the multilayer graphene (MLG). Under the optimal fluence of 4.72 J/cm 2 with a pulse overlap of 66%, the MLG can be patterned with arrays of 250 μm 2 hole surface structures. A 354-bp DNA fragment of VP1, an effective marker for diagnosing the BK virus, was amplified on an on-chip device in less than 60 min. A thin-film electrode with the aforementioned MLG as the heater was demonstrated to significantly enhance temperature stability for each stage of the thermal cycle. The temperature control of the heater was performed by means of a developed programmable PCR apparatus. Our results demonstrated that the proposed integration of a graphene-based device and a laser-pulse ablation process to form a thin-film PCR device has cost benefits in a small-volume reagent and holds great promise for practical medical use of DNA amplification.

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“…Moreover, for HCMJPV and high power IC chips, five stepwise microchannel cooling system with variable widths 1.53-0.14m ( Fig. 1) was experimentally investigated by Riera et al [9,39]. This system has one jet inlet and two outlets and includes thermal interface material (TIM) between the copper layer and the heat sink device (silicon microchannel).…”

Section: Introductionmentioning

confidence: 99%

Development of one-section microchannels cooling system for high-concentration photovoltaic cells

Ibrahim

Abdel-Hameeda

Abou-Ziyana

2019

Engineering Research Journal

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Experimental demonstration of a tailored-width microchannel heat exchanger configuration for uniform wall temperature

Cited by 8 publications

References 8 publications

Impact of DC-DC Converters on the Energy Performance of a Dense Concentrator PV Array under Nonuniform Irradiance and Temperature Profiles

Impact of DC-DC Converters on the Energy Performance of a Dense Concentrator PV Array under Nonuniform Irradiance and Temperature Profiles

Thermally stable and uniform DNA amplification with picosecond laser ablated graphene rapid thermal cycling device

Development of one-section microchannels cooling system for high-concentration photovoltaic cells

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