Efficiency and heat loss analysis of honeycomb receiver varying air mass flow rate and beam width

Nakakura, Mitsuho; Matsubara, Koji; Bellan, Selvan; Kodama, Tetsuya

doi:10.1016/j.ijheatmasstransfer.2019.03.153

Cited by 9 publications

(7 citation statements)

References 27 publications

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“…The emissivity (absorptivity) of the solid wall is 0.9 with assuming the gray wall of a channel. The previous work (Nakakura et al (2019)) examined the effects from grid resolution and DO separation for the case of low incident heat flux 0 = 501 kW/m 2 . The work proved that 5x5x8 and finer DO separation satisfactorily converged the numerical variables.…”

Section: Methodsmentioning

confidence: 99%

“…Cell size effects analysis revealed that increasing the air mass flow deteriorated the receiver efficiency at the power over air mass (POM) kept constant but decreasing cell size recovered the efficiency (Nakakura et al, 2020). This paper is devoted to numerical analysis in the same direction as the previous works (Nakakura et al, 2017;Nakakura et al, 2018;Nakakura et al, 2019;Nakakura et al, 2020). The former papers varied air mass flow rate at the constant POM; however, this paper changes working conditions at the constant incidence flux from practical viewpoint.…”

Section: Introductionmentioning

confidence: 98%

“…Although the compilation of knowledge continues to this moment, there are still ambiguity on characteristics at high temperatures. Research works have been conducted on a honeycomb receiver irradiated by a beamdown concentrating sun simulator (Nakakura et al, 2017;Nakakura et al, 2018;Nakakura et al, 2019;Nakakura et al, 2020). It was proved that nearly symmetrical temperature field created by the beamdown optics prevented buoyant flow, which increased receiver efficiency (Nakakura et al, 2017).…”

Section: Introductionmentioning

confidence: 99%

“…Conjugate radiation, convection and conduction solver was developed for direct simulation of heat transfer along the actual shape of a honeycomb channel (Nakakura et al, 2018). Efficiency loss analysis were made based on energy balance of the receiver (Nakakura et al, 2019). Cell size effects analysis revealed that increasing the air mass flow deteriorated the receiver efficiency at the power over air mass (POM) kept constant but decreasing cell size recovered the efficiency (Nakakura et al, 2020).…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Conjugate simulation of solar honeycomb receiver for high temperature heat absorption at constant incident heat flux

Kawasaki

Nakakura

Matsubara

2020

JTST

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Conjugate simulation of solar honeycomb receiver for high temperature heat absorption at constant incident heat flux Abstract Conjugate radiation-convection-conduction simulation was conducted for a solar volumetric receiver of silicon carbide honeycomb for high temperature heat absorption at 1,000°C and higher. Simulation was made for three cases of channel cell size: 0.6mm; 1.5mm; 2.9mm. At two levels of incident heat flux 1,400 kW m −2 and 4,200 kW m −2 , air mass flux was changed variously for optimization of working conditions. When the cell size is reduced from d = 2.9 mm to 0.6 mm, the receiver efficiency together with the air temperature at the receiver exit increase at each level of incident heat flux. At 1,400 kW m −2 , the receiver efficiency exceeds 0.8 when the air temperature is as high as 1000°C in the case of the smallest cell size: d = 0.6 mm. At 4,200 kW m −2 , the efficiency surpasses 0.80 when the air temperature is almost 1500°C in the case of d = 0.6 mm. The heat losses from the receiver was analyzed through budget of energy balance equation. It was found that the thermal radiation was attenuated by reduction of channel cell size which resulted in enhancement of the receiver efficiency. The mean temperature at the top edge of the receiver decreased with the reduction of channel size in consistency with the attenuation of thermal radiation. The numerical result demonstrated that the reducing cell size is essential to absorb concentrated solar light at very high temperatures beyond 1000°C and higher.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Conjugate simulation of solar honeycomb receiver for high temperature heat absorption at constant incident heat flux

Kawasaki

Nakakura

Matsubara

2020

JTST

Self Cite

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“…In real commercial solar thermal power plant (actual and large receiver), thousands of heliostat modules are used to concentrate the incident solar radiation on the receiver surface and one volumetric solar receiver module may receive solar rays from multiple heliostats. As a result, there will be a range of incidence angle values and a dominant value is usually used in the analysis [32,[56][57][58][59]. This dominant value can be controlled by changing the tilt angle of the receiver (θ R ).…”

Section: Analysis Of Absorbed Solar Heat Flux Distributionmentioning

confidence: 99%

Consistent coupled optical and thermal analysis of volumetric solar receivers with honeycomb absorbers

et al. 2020

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HAL is a multi-disciplinary open access archive for the deposit and dissemination of scientific research documents, whether they are published or not. The documents may come from teaching and research institutions in France or abroad, or from public or private research centers. L'archive ouverte pluridisciplinaire HAL, est destinée au dépôt et à la diffusion de documents scientifiques de niveau recherche, publiés ou non, émanant des établissements d'enseignement et de recherche français ou étrangers, des laboratoires publics ou privés.

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Heat transfer characteristics of straw-core paper honeycomb plates (beetle elytron plates) I: Experimental study on horizontal placement with hot-above and cold-below conditions

Chen

Guo

et al. 2021

Applied Thermal Engineering

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Efficiency and heat loss analysis of honeycomb receiver varying air mass flow rate and beam width

Cited by 9 publications

References 27 publications

Conjugate simulation of solar honeycomb receiver for high temperature heat absorption at constant incident heat flux

Conjugate simulation of solar honeycomb receiver for high temperature heat absorption at constant incident heat flux

Consistent coupled optical and thermal analysis of volumetric solar receivers with honeycomb absorbers

Heat transfer characteristics of straw-core paper honeycomb plates (beetle elytron plates) I: Experimental study on horizontal placement with hot-above and cold-below conditions

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