Estimation of convective heat losses from conical cavity receiver of solar parabolic dish collector under wind conditions and receiver orientations

The parabolic dish collector is one of the recognized concentrated solar power systems based on point focusing, which provides high-temperature heat, high concentration ratio, and low heat loss. This system consists of a parabolic reflector and a cavity receiver situated in the focus line. In this w...

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Autores principales:	Rajan Abhinav, Reddy K. S.
Formato:	article
Lenguaje:	EN FR
Publicado:	EDP Sciences 2021
Materias:	Environmental sciences GE1-350
Acceso en línea:	https://doaj.org/article/4273556dbae44b43aed8924487b5c121
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spelling	oai:doaj.org-article:4273556dbae44b43aed8924487b5c1212021-11-08T15:18:57ZEstimation of convective heat losses from conical cavity receiver of solar parabolic dish collector under wind conditions and receiver orientations2267-124210.1051/e3sconf/202131311001https://doaj.org/article/4273556dbae44b43aed8924487b5c1212021-01-01T00:00:00Zhttps://www.e3s-conferences.org/articles/e3sconf/pdf/2021/89/e3sconf_isec2021_11001.pdfhttps://doaj.org/toc/2267-1242The parabolic dish collector is one of the recognized concentrated solar power systems based on point focusing, which provides high-temperature heat, high concentration ratio, and low heat loss. This system consists of a parabolic reflector and a cavity receiver situated in the focus line. In this work, the conical cavity receiver with an aperture diameter of 0.5 m is considered for a 100 m2 parabolic reflector having a focal to diameter ratio of 0.48. Due to the complexity of flow and temperature profile, the estimation of convective heat loss is a difficult task in a cavity receiver. More heat losses are associated with high temperature obtained in the cavity receiver of the parabolic dish collector. Due to diverse wind effect, the convective heat losses ramp up, which significantly influences the thermal performance of the concentrating power system. The present work aims to investigate the heat losses due to convection from the conical cavity receiver. The numerical investigation was performed using ANSYS Fluent 20R1 to calculate the convective heat losses from the conical cavity receiver of varying diameter to height ratio for varying wind speed, receiver orientation in head-on, and back-on wind flow directions. The considered influential parameters are varying from 0.5 to 1.5 for diameter to height ratio (d/h), 0° to 90° for receiver orientation (γ), 0 to 10 m/s for wind speed (V). The heat losses are highest at 60° and 75° receiver orientation for d/h = 0.5 and d/h = 1-1.5, respectively, at high wind speed in head-on condition, whereas in back-on wind condition, 30° receiver orientation has more heat losses among all the d/h values at high wind speed. The heat loss at 90° receiver orientation is low for 4-10 m/s. The trends of heat loss curve at receiver orientations for given wind conditions are similar for velocity more than 2 m/s. The result reveals that the considered influential parameters have a remarkable effect on convective heat losses from the cavity receiver.Rajan AbhinavReddy K. S.EDP SciencesarticleEnvironmental sciencesGE1-350ENFRE3S Web of Conferences, Vol 313, p 11001 (2021)
institution	DOAJ
collection	DOAJ
language	EN FR
topic	Environmental sciences GE1-350
spellingShingle	Environmental sciences GE1-350 Rajan Abhinav Reddy K. S. Estimation of convective heat losses from conical cavity receiver of solar parabolic dish collector under wind conditions and receiver orientations
description	The parabolic dish collector is one of the recognized concentrated solar power systems based on point focusing, which provides high-temperature heat, high concentration ratio, and low heat loss. This system consists of a parabolic reflector and a cavity receiver situated in the focus line. In this work, the conical cavity receiver with an aperture diameter of 0.5 m is considered for a 100 m2 parabolic reflector having a focal to diameter ratio of 0.48. Due to the complexity of flow and temperature profile, the estimation of convective heat loss is a difficult task in a cavity receiver. More heat losses are associated with high temperature obtained in the cavity receiver of the parabolic dish collector. Due to diverse wind effect, the convective heat losses ramp up, which significantly influences the thermal performance of the concentrating power system. The present work aims to investigate the heat losses due to convection from the conical cavity receiver. The numerical investigation was performed using ANSYS Fluent 20R1 to calculate the convective heat losses from the conical cavity receiver of varying diameter to height ratio for varying wind speed, receiver orientation in head-on, and back-on wind flow directions. The considered influential parameters are varying from 0.5 to 1.5 for diameter to height ratio (d/h), 0° to 90° for receiver orientation (γ), 0 to 10 m/s for wind speed (V). The heat losses are highest at 60° and 75° receiver orientation for d/h = 0.5 and d/h = 1-1.5, respectively, at high wind speed in head-on condition, whereas in back-on wind condition, 30° receiver orientation has more heat losses among all the d/h values at high wind speed. The heat loss at 90° receiver orientation is low for 4-10 m/s. The trends of heat loss curve at receiver orientations for given wind conditions are similar for velocity more than 2 m/s. The result reveals that the considered influential parameters have a remarkable effect on convective heat losses from the cavity receiver.
format	article
author	Rajan Abhinav Reddy K. S.
author_facet	Rajan Abhinav Reddy K. S.
author_sort	Rajan Abhinav
title	Estimation of convective heat losses from conical cavity receiver of solar parabolic dish collector under wind conditions and receiver orientations
title_short	Estimation of convective heat losses from conical cavity receiver of solar parabolic dish collector under wind conditions and receiver orientations
title_full	Estimation of convective heat losses from conical cavity receiver of solar parabolic dish collector under wind conditions and receiver orientations
title_fullStr	Estimation of convective heat losses from conical cavity receiver of solar parabolic dish collector under wind conditions and receiver orientations
title_full_unstemmed	Estimation of convective heat losses from conical cavity receiver of solar parabolic dish collector under wind conditions and receiver orientations
title_sort	estimation of convective heat losses from conical cavity receiver of solar parabolic dish collector under wind conditions and receiver orientations
publisher	EDP Sciences
publishDate	2021
url	https://doaj.org/article/4273556dbae44b43aed8924487b5c121
work_keys_str_mv	AT rajanabhinav estimationofconvectiveheatlossesfromconicalcavityreceiverofsolarparabolicdishcollectorunderwindconditionsandreceiverorientations AT reddyks estimationofconvectiveheatlossesfromconicalcavityreceiverofsolarparabolicdishcollectorunderwindconditionsandreceiverorientations
_version_	1718441938052448256

Estimation of convective heat losses from conical cavity receiver of solar parabolic dish collector under wind conditions and receiver orientations

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