Performance analysis of Parabolic Trough Collectors with Double Glass Envelope

Julian D. Osorio, Alejandro Rivera-Alvarez

Resultado de la investigación: Contribución a una revistaArtículoInvestigaciónrevisión exhaustiva

3 Citas (Scopus)

Resumen

© 2018 Elsevier Ltd In this work, the performance of Parabolic Trough Collectors (PTCs) with Double Glass Envelope (DGE) is studied. A one-dimensional model comprising optical and thermal analyses is developed. The effect of an Inner Glass Envelope (IGE), thermal emittance of the envelopes, and vacuum conditions in the two resulting annuli are analyzed in detail and compared with the performance of a traditional PTC. The incorporation of an additional envelope into a traditional PTC reduces heat losses. At high operating temperatures, the reduction in thermal losses achieved with the DGE PTC leads to a superior efficiency. It is found that an IGE having low emittance values could be used to reduce heat losses and replace the vacuum in conventional PTCs. In addition, in a DGE PTC, vacuum is more important in the annulus between the absorber pipe and the IGE. The effect of solar irradiance on the performance of a DGE PTC is also studied considering clear sky and partially cloudy sky day conditions. In general, higher solar irradiance values favor collectors’ efficiency. Finally, the efficiency of a DGE PTC is analyzed considering a commercially architectural glass and a glass for solar applications. The DGE PTC with IGE made of a glass for solar applications exhibits higher performance than a traditional PTC at high temperatures. However, a detailed economic analysis is required in order to determine the total energy cost with the proposed DGE PTC concept. Using a DGE improves the collector efficiency at high temperatures especially during partially cloudy sky days.
Idioma originalInglés estadounidense
Páginas (desde-hasta)1092-1107
Número de páginas16
PublicaciónRenewable Energy
DOI
EstadoPublicada - 1 ene 2019

Huella dactilar

Glass
Collector efficiency
Vacuum
Heat losses
Economic analysis
Temperature
Pipe

Citar esto

@article{a07df0fd88cb43cc8158eb05347f2f69,
title = "Performance analysis of Parabolic Trough Collectors with Double Glass Envelope",
abstract = "{\circledC} 2018 Elsevier Ltd In this work, the performance of Parabolic Trough Collectors (PTCs) with Double Glass Envelope (DGE) is studied. A one-dimensional model comprising optical and thermal analyses is developed. The effect of an Inner Glass Envelope (IGE), thermal emittance of the envelopes, and vacuum conditions in the two resulting annuli are analyzed in detail and compared with the performance of a traditional PTC. The incorporation of an additional envelope into a traditional PTC reduces heat losses. At high operating temperatures, the reduction in thermal losses achieved with the DGE PTC leads to a superior efficiency. It is found that an IGE having low emittance values could be used to reduce heat losses and replace the vacuum in conventional PTCs. In addition, in a DGE PTC, vacuum is more important in the annulus between the absorber pipe and the IGE. The effect of solar irradiance on the performance of a DGE PTC is also studied considering clear sky and partially cloudy sky day conditions. In general, higher solar irradiance values favor collectors’ efficiency. Finally, the efficiency of a DGE PTC is analyzed considering a commercially architectural glass and a glass for solar applications. The DGE PTC with IGE made of a glass for solar applications exhibits higher performance than a traditional PTC at high temperatures. However, a detailed economic analysis is required in order to determine the total energy cost with the proposed DGE PTC concept. Using a DGE improves the collector efficiency at high temperatures especially during partially cloudy sky days.",
author = "Osorio, {Julian D.} and Alejandro Rivera-Alvarez",
year = "2019",
month = "1",
day = "1",
doi = "10.1016/j.renene.2018.06.024",
language = "American English",
pages = "1092--1107",
journal = "Renewable Energy",
issn = "0960-1481",
publisher = "Elsevier BV",

}

Performance analysis of Parabolic Trough Collectors with Double Glass Envelope. / Osorio, Julian D.; Rivera-Alvarez, Alejandro.

En: Renewable Energy, 01.01.2019, p. 1092-1107.

Resultado de la investigación: Contribución a una revistaArtículoInvestigaciónrevisión exhaustiva

TY - JOUR

T1 - Performance analysis of Parabolic Trough Collectors with Double Glass Envelope

AU - Osorio, Julian D.

AU - Rivera-Alvarez, Alejandro

PY - 2019/1/1

Y1 - 2019/1/1

N2 - © 2018 Elsevier Ltd In this work, the performance of Parabolic Trough Collectors (PTCs) with Double Glass Envelope (DGE) is studied. A one-dimensional model comprising optical and thermal analyses is developed. The effect of an Inner Glass Envelope (IGE), thermal emittance of the envelopes, and vacuum conditions in the two resulting annuli are analyzed in detail and compared with the performance of a traditional PTC. The incorporation of an additional envelope into a traditional PTC reduces heat losses. At high operating temperatures, the reduction in thermal losses achieved with the DGE PTC leads to a superior efficiency. It is found that an IGE having low emittance values could be used to reduce heat losses and replace the vacuum in conventional PTCs. In addition, in a DGE PTC, vacuum is more important in the annulus between the absorber pipe and the IGE. The effect of solar irradiance on the performance of a DGE PTC is also studied considering clear sky and partially cloudy sky day conditions. In general, higher solar irradiance values favor collectors’ efficiency. Finally, the efficiency of a DGE PTC is analyzed considering a commercially architectural glass and a glass for solar applications. The DGE PTC with IGE made of a glass for solar applications exhibits higher performance than a traditional PTC at high temperatures. However, a detailed economic analysis is required in order to determine the total energy cost with the proposed DGE PTC concept. Using a DGE improves the collector efficiency at high temperatures especially during partially cloudy sky days.

AB - © 2018 Elsevier Ltd In this work, the performance of Parabolic Trough Collectors (PTCs) with Double Glass Envelope (DGE) is studied. A one-dimensional model comprising optical and thermal analyses is developed. The effect of an Inner Glass Envelope (IGE), thermal emittance of the envelopes, and vacuum conditions in the two resulting annuli are analyzed in detail and compared with the performance of a traditional PTC. The incorporation of an additional envelope into a traditional PTC reduces heat losses. At high operating temperatures, the reduction in thermal losses achieved with the DGE PTC leads to a superior efficiency. It is found that an IGE having low emittance values could be used to reduce heat losses and replace the vacuum in conventional PTCs. In addition, in a DGE PTC, vacuum is more important in the annulus between the absorber pipe and the IGE. The effect of solar irradiance on the performance of a DGE PTC is also studied considering clear sky and partially cloudy sky day conditions. In general, higher solar irradiance values favor collectors’ efficiency. Finally, the efficiency of a DGE PTC is analyzed considering a commercially architectural glass and a glass for solar applications. The DGE PTC with IGE made of a glass for solar applications exhibits higher performance than a traditional PTC at high temperatures. However, a detailed economic analysis is required in order to determine the total energy cost with the proposed DGE PTC concept. Using a DGE improves the collector efficiency at high temperatures especially during partially cloudy sky days.

U2 - 10.1016/j.renene.2018.06.024

DO - 10.1016/j.renene.2018.06.024

M3 - Article

SP - 1092

EP - 1107

JO - Renewable Energy

JF - Renewable Energy

SN - 0960-1481

ER -