Experimental investigation on natural convective heat loss of cylindrical cavity with/without a quartz window

Xiao, Lan; Cai, Xiaodong; Wu, Shuang–Ying

doi:10.1016/j.ijthermalsci.2019.106220

Cited by 7 publications

(3 citation statements)

References 33 publications

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“…Xiao et al (2020) [ 27 ] experimentally examined and analyzed the characteristics of natural convective heat loss for a cylindrical container without and with a quartz window. By varying the heated states and tilt angles of the walls, the thermal performance of two kinds of cavity receivers is investigated, and the influence of the quartz window on the cavity’s heat loss is emphasized.…”

Section: Review On Cylindrical Cavitiesmentioning

confidence: 99%

“…It was also noticed that the vibrations disrupt the centrifugal force field's axial symmetry when the frequencies coincide. As a consequence, the temperature at the cavity axis is significantly reduced.Xiao et al (2020)[27] experimentally examined and analyzed the characteristics of natural convective heat loss for a cylindrical container without and with a quartz window. By varying the heated states and tilt angles of the walls, the thermal performance of two kinds of cavity receivers is investigated, and the influence of the quartz window on the cavity's heat loss is emphasized.…”

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confidence: 99%

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Review of Heat Transfer Analysis in Different Cavity Geometries with and without Nanofluids

et al. 2022

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Many strategies have been attempted for accomplishing the needed changes in the heat-transfer rate in closed cavities in recent years. Some strategies used include the addition of flexible or hard partitions to the cavities (to split them into various pieces), thickening the borders, providing fins to the cavities, or altering the forms or cavity angles. Each of these methods may be used to increase or decrease heat transmission. Many computational and experimental investigations of heat transport in various cavity shapes have been conducted. The majority of studies focused on improving the thermal efficiency of heat transmission in various cavity containers. This paper introduced a review of experimental, numerical, and analytical studies related to heat transfer analyses in different geometries, such as circular, cylindrical, hexagonal, and rectangular cavities. Results of the evaluated studies indicate that the fin design increased heat transmission and sped up the melting time of the PCM; the optimal wind incidence angle for the maximum loss of combined convective heat depends on the tilt angle of the cavity and wind speed. The Nusselt number graphs behave differently when decreasing the Richardson number. Comparatively, the natural heat transfer process dominates at Ri = 10, but lid motion is absent at Ri = 1. For a given Ri and Pr, the cavity without a block performed better than the cavity with a square or circular block. The heat transfer coefficient at the heating sources has been established as a performance indicator. Hot source fins improve heat transmission and reduce gallium melting time.

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Section: Review On Cylindrical Cavitiesmentioning

confidence: 99%

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confidence: 99%

Review of Heat Transfer Analysis in Different Cavity Geometries with and without Nanofluids

et al. 2022

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“…They experimented with various flow configurations and tube diameters and achieved thermal and exergetic efficiencies of around 78.8% and 19.8%, respectively. Xiao et al 100 numerically explored the effect of tube diameter and aspect ratio of a cylindrical cavity tube receiver. They showed that an increase in tube diameter from 8 to 18 mm reduces the overall efficiency of the receiver by 1.62%.…”

Section: Cavity Receiversmentioning

confidence: 99%

Stationary point focus solar concentrators—A review

Reddy

Khan

2022

Intl J of Energy Research

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The innovation in concentrated solar power (CSP) systems is one of the many vital solutions to meet the ever-increasing global energy demands. Among various CSP systems, point focus solar concentrators can attain a higher concentration ratio and helps reduce the size of the receiver, resulting in higher operating temperatures, lower thermal losses, and higher system exergy. This article presents a review on a particular class of CSP systems known as stationary point focus solar concentrators, that is, point focus solar concentrators having a stationary receiver. They can be categorized as (a) Scheffler reflector, (b) Scheffler-type concentrator, (c) high temperature concentrator, (d) central tower receiver, and (e) CNRS solar furnace. Having a stationary receiver helps reduce the maintenance and simplifies the plumbing network for heat transfer fluid. However, low maintenance might be a tradeoff on the performance side. This review systematically collates the literature on stationary point focus solar concentrators. Also, the basics of solar angles and various solar tracking systems applicable to this class of CSP systems are covered. K E Y W O R D Scentral tower receiver, fixed focus solar concentrator, high-temperature concentrator, Scheffler reflector, Scheffler-type solar concentrator

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Improvement in the photothermal conversion performance of a solar cavity receiver with concave spherical windows

Nie,

Chen,

Zhang

et al. 2024

Applied Thermal Engineering

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Experimental investigation on natural convective heat loss of cylindrical cavity with/without a quartz window

Cited by 7 publications

References 33 publications

Review of Heat Transfer Analysis in Different Cavity Geometries with and without Nanofluids

Review of Heat Transfer Analysis in Different Cavity Geometries with and without Nanofluids

Stationary point focus solar concentrators—A review

Improvement in the photothermal conversion performance of a solar cavity receiver with concave spherical windows

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