Experimental and Numerical Thermal Analysis of Multi-Layered Microchannel Heat Sink for Concentrating Photovoltaic Application

Siyabi, Idris Al; Khanna, Sourav; Sundaram, Senthilarasu; Mallick, Tapas K.

doi:10.3390/en12010122

Cited by 38 publications

(19 citation statements)

References 52 publications

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“…The maximum solar cell temperature reached 65 • C at 0.01 m/s. Alsiyabi et al [6] investigated the performance of the CPV system at 500× using a microchannel heat sink. They reported that the maximum cell temperature reached 54 • C using four layers of a microchannel heat sink, which adds to the cost of the system.…”

Section: Introductionmentioning

confidence: 99%

Theoretical Investigation of the Temperature Limits of an Actively Cooled High Concentration Photovoltaic System

et al. 2020

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Concentrator photovoltaics have several advantages over flat plate systems. However, the increase in solar concentration usually leads to an increase in the solar cell temperature, which decreases the performance of the system. Therefore, in this paper, we investigate the performance and temperature limits of a high concentration photovoltaic Thermal system (HCPVT) based on a 1 cm2 multi-junction solar cell subjected to a concentration ratio from 500× to 2000× by using three different types of cooling fluids (water, ethylene glycol and water mixture (60:40), and syltherm oil 800). The results show that, for this configuration, the maximum volumetric temperature of the solar cell did not exceed the manufacturer’s recommended limit for the tested fluids. At 2000× the lowest solar cell temperature obtained by using water was 93.5 °C, while it reached as high as 109 °C by using syltherm oil 800, which is almost equal to the maximum operating limit provided by the manufacturer (110 °C). Overall, the best performance in terms of temperature distribution, thermal, and electrical efficiency was achieved by using water, while the highest outlet temperature was obtained by using syltherm oil 800.

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Section: Introductionmentioning

confidence: 99%

Theoretical Investigation of the Temperature Limits of an Actively Cooled High Concentration Photovoltaic System

et al. 2020

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“…Several papers showed that a multilayered channel heat sink technique is more reliable compared to many other cooling approaches with better heat transfer rate and lower operating cost. Multilayered microchannel heat sinks have been used by Al-Siyabi et al 30 for CPV cooling.…”

Section: Introductionmentioning

confidence: 99%

Optimization and feasibility analysis of a microscale pin‐fins heat sink of an ultrahigh concentrating photovoltaic system

et al. 2020

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Nowadays, the most recent optical configuration based on Cassegrain and Fresnel lens designs of concentrator photovoltaic(CPV) has shown a race to achieve the ultrahigh concentration ratio. Still, none of those has experimentally shown an optical concentration ratio (GC) beyond 2000 suns. This is because their energy concentration ratios are challenged by the excessive temperature raised throughout the optical stages, which diminishes the efficiency of the solar cell. In this context, this research work aims to numerically investigate a microscale pin-fins heat sink configuration to enhance the thermal performance and the cost-competitivity of ultrahigh CPV thermal receiver. The impacts of the solar cell area, cell efficiency, and heat sink's material have been analyzed and discussed. The results showed that a circular pin-fins heat sink could accomplish a drop of 23.28% in the maximum operating cell temperature at 10 000 suns for cell area of 1 × 1 mm 2 relatively compared to the conventional flat-plate heat sink. Furthermore, for a circular pin-fins heat sink with a cell area of 2 × 2 mm 2 , the cell temperature started exceeding the safe operating range of temperature (80 C) at 8000 suns with an average temperature of 96.1 C and reaching a maximum of 113.91 C at 10 000 suns. A gradient temperature on the planar direction of the aluminum circular pin-fins heat sink was about 1.187 C at 10 000 suns whereas 0.703 C was recorded in the case of a copper circular pin-fins heat sink. The circular pin-fins heat sink showed the highest thermal performance resulting in maintaining the solar cell temperature within its safe operating range even beyond 10 000 suns. From an economic point of view, aluminum circular pin-fins heat sink has been found to be less costly than the copper one. Finally, it was found that at 8000 suns, the flat-plate heat sink cost is more expensive than the traditional pin-fins heat sink by 14.7%, where the flat-plate heat sink becomes the worst economic configuration at 10 000 suns. At that concentration ratio, the cost has increased by 43.38%, 5.75%, and 10.61% compared to the traditional pin-fins heat sink, cylindrical pin-fins heat sink, and circular pin-fins heat sink, respectively.

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“…In recent years, a great number of studies have been conducted utilizing innovative geometries [ 23 , 24 , 25 , 26 , 27 , 28 , 29 , 30 , 31 , 32 , 33 ], employing liquid coolants with excellent thermal features [ 34 , 35 , 36 , 37 , 38 , 39 , 40 , 41 ], and applying micro-pin-fins [ 42 , 43 , 44 ] in order to improve the capabilities of microchannel heat sinks (MCHS) removing the heat generated by electronic chips.…”

Section: Introductionmentioning

confidence: 99%

“…Soleimanikutanaei et al [ 31 ] carried out a numerical study of the heat transfer enhancement through utilizing transverse microchannels in heat sinks. Al Siyabi et al [ 32 ] conducted an experimental research on the performance of a multilayered microchannel heat sink. Deng et al [ 33 ] numerically examined the behavior of double-layered microchannel heat sinks with different cross-sectional shapes.…”

Section: Introductionmentioning

confidence: 99%

Fluid Flow and Entropy Generation Analysis of Al2O3–Water Nanofluid in Microchannel Plate Fin Heat Sinks

Duan

et al. 2019

Entropy

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The flow in channels of microdevices is usually in the developing regime. Three-dimensional laminar flow characteristics of a nanofluid in microchannel plate fin heat sinks are investigated numerically in this paper. Deionized water and Al2O3–water nanofluid are employed as the cooling fluid in our work. The effects of the Reynolds number (100 < Re < 1000), channel aspect ratio (0 < ε < 1), and nanoparticle volume fraction (0.5% < Φ < 5%) on pressure drop and entropy generation in microchannel plate fin heat sinks are examined in detail. Herein, the general expression of the entropy generation rate considering entrance effects is developed. The results revealed that the frictional entropy generation and pressure drop increase as nanoparticle volume fraction and Reynolds number increase, while decrease as the channel aspect ratio increases. When the nanoparticle volume fraction increases from 0 to 3% at Re = 500, the pressure drop of microchannel plate fin heat sinks with ε = 0.5 increases by 9%. It is demonstrated that the effect of the entrance region is crucial for evaluating the performance of microchannel plate fin heat sinks. The study may shed some light on the design and optimization of microchannel heat sinks.

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Experimental and Numerical Thermal Analysis of Multi-Layered Microchannel Heat Sink for Concentrating Photovoltaic Application

Cited by 38 publications

References 52 publications

Theoretical Investigation of the Temperature Limits of an Actively Cooled High Concentration Photovoltaic System

Theoretical Investigation of the Temperature Limits of an Actively Cooled High Concentration Photovoltaic System

Optimization and feasibility analysis of a microscale pin‐fins heat sink of an ultrahigh concentrating photovoltaic system

Fluid Flow and Entropy Generation Analysis of Al2O3–Water Nanofluid in Microchannel Plate Fin Heat Sinks

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