Thermal analysis of a finned receiver for a central tower solar system

A. Piña-Ortiz; J. F. Hinojosa; R. A. Pérez-Enciso; V. M. Maytorena; R. A. Calleja; C. A. Estrada

doi:10.1016/j.renene.2018.07.123

Thermal analysis of a finned receiver for a central tower solar system

A. Piña-Ortiz, J. F. Hinojosa, R. A. Pérez-Enciso, V. M. Maytorena, R. A. Calleja, C. A. Estrada

Research output: Contribution to journal › Article › peer-review

11 Scopus citations

Abstract

In this study, a thermal analysis of a finned receiver prototype for a thermosolar tower system is presented. The experimental system consists of parallelepiped aluminum enclosure of 1.2 m high, 1.23 m wide and 0.1 m depth. At the interior, 1232 cylindrical fins with a diameter of 0.0095 m (3/8″) and 0.09 m length increases the heat transfer area up to 225%. The vertical wall receives the incoming solar concentrated radiation from a group of heliostats whilst at the interior a constant flow of water removes the absorbed energy. Experimental temperature profiles were obtained at different heights and depths and a comparison was made with numerical results obtained with the use of commercial CFD software. It was found that the maximum thermal efficiency of the receiver was 94.4%, decreasing as the radiative flux increases.

Original language	American English
Pages (from-to)	1002-1012
Number of pages	11
Journal	Renewable Energy
Volume	131
DOIs	https://doi.org/10.1016/j.renene.2018.07.123 https://doi.org/10.1016/j.renene.2018.07.123
State	Published - 1 Feb 2019

Bibliographical note

Funding Information:
This work has been partially funded by CONACYT (Grant 123767 ). A. Piña-Ortiz and R.A. Pérez-Enciso would like to gratefully acknowledge CONACYT the support granted through its program for Institutional consolidation which permits the retention of recent researchers. A Receiver width, (m) Ar Inner hot surface area, (m2) Cp Specific heat at constant pressure, (J/kg K) D Inlet pipe diameter, (m) g Gravitational acceleration, (m/s2) Gk Generation of turbulent kinetic energy due to the buoyant force, (J/kg) Gr Grashof number, nondimensional H Receiver height, (m) h Average convective heat transfer coefficient, (W/m2 K) k Turbulent kinetic energy, (m2/s2) L Receiver length, (m) m ˙ Mass flow, (kg/s) Nu Average Nusselt number of the heated wall, nondimensional qcal Calorimetric heat flux, (W/m2) qHFS Radiative heat flux, (W/m2) Pk Generation of turbulent kinetic energy, (J/kg) Ra Modified Rayleigh number at the heated wall, nondimensional Re Reynolds number at the inlets, nondimensional T amb Ambient temperature, (K) T h ¯ Average temperature of the hot wall, (K) T i ¯ Average temperature of the inlets, (K) T ∞ Temperature of the bulk fluid, (K) U Inlet velocity, (m/s) x, y, z Coordinate system, (m) i, j, k Unity vector components

Publisher Copyright:
© 2018 Elsevier Ltd

Keywords

Concentrated radiation
Heat transfer
Solar tower system
Thermal receiver

Access to Document

https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85053221385&origin=inward

Cite this

@article{aa00562b08c544d4823d357adc8ec1bf,

title = "Thermal analysis of a finned receiver for a central tower solar system",

abstract = "In this study, a thermal analysis of a finned receiver prototype for a thermosolar tower system is presented. The experimental system consists of parallelepiped aluminum enclosure of 1.2 m high, 1.23 m wide and 0.1 m depth. At the interior, 1232 cylindrical fins with a diameter of 0.0095 m (3/8″) and 0.09 m length increases the heat transfer area up to 225%. The vertical wall receives the incoming solar concentrated radiation from a group of heliostats whilst at the interior a constant flow of water removes the absorbed energy. Experimental temperature profiles were obtained at different heights and depths and a comparison was made with numerical results obtained with the use of commercial CFD software. It was found that the maximum thermal efficiency of the receiver was 94.4%, decreasing as the radiative flux increases.",

keywords = "Concentrated radiation, Heat transfer, Solar tower system, Thermal receiver",

author = "A. Pi{\~n}a-Ortiz and Hinojosa, {J. F.} and P{\'e}rez-Enciso, {R. A.} and Maytorena, {V. M.} and Calleja, {R. A.} and Estrada, {C. A.}",

note = "Funding Information: This work has been partially funded by CONACYT (Grant 123767 ). A. Pi{\~n}a-Ortiz and R.A. P{\'e}rez-Enciso would like to gratefully acknowledge CONACYT the support granted through its program for Institutional consolidation which permits the retention of recent researchers. A Receiver width, (m) Ar Inner hot surface area, (m2) Cp Specific heat at constant pressure, (J/kg K) D Inlet pipe diameter, (m) g Gravitational acceleration, (m/s2) Gk Generation of turbulent kinetic energy due to the buoyant force, (J/kg) Gr Grashof number, nondimensional H Receiver height, (m) h Average convective heat transfer coefficient, (W/m2 K) k Turbulent kinetic energy, (m2/s2) L Receiver length, (m) m ˙ Mass flow, (kg/s) Nu Average Nusselt number of the heated wall, nondimensional qcal Calorimetric heat flux, (W/m2) qHFS Radiative heat flux, (W/m2) Pk Generation of turbulent kinetic energy, (J/kg) Ra Modified Rayleigh number at the heated wall, nondimensional Re Reynolds number at the inlets, nondimensional T amb Ambient temperature, (K) T h ¯ Average temperature of the hot wall, (K) T i ¯ Average temperature of the inlets, (K) T ∞ Temperature of the bulk fluid, (K) U Inlet velocity, (m/s) x, y, z Coordinate system, (m) i, j, k Unity vector components Publisher Copyright: {\textcopyright} 2018 Elsevier Ltd",

year = "2019",

month = feb,

day = "1",

doi = "10.1016/j.renene.2018.07.123",

language = "American English",

volume = "131",

pages = "1002--1012",

journal = "Renewable Energy",

issn = "0960-1481",

publisher = "Elsevier BV",

}

TY - JOUR

T1 - Thermal analysis of a finned receiver for a central tower solar system

AU - Piña-Ortiz, A.

AU - Hinojosa, J. F.

AU - Pérez-Enciso, R. A.

AU - Maytorena, V. M.

AU - Calleja, R. A.

AU - Estrada, C. A.

N1 - Funding Information: This work has been partially funded by CONACYT (Grant 123767 ). A. Piña-Ortiz and R.A. Pérez-Enciso would like to gratefully acknowledge CONACYT the support granted through its program for Institutional consolidation which permits the retention of recent researchers. A Receiver width, (m) Ar Inner hot surface area, (m2) Cp Specific heat at constant pressure, (J/kg K) D Inlet pipe diameter, (m) g Gravitational acceleration, (m/s2) Gk Generation of turbulent kinetic energy due to the buoyant force, (J/kg) Gr Grashof number, nondimensional H Receiver height, (m) h Average convective heat transfer coefficient, (W/m2 K) k Turbulent kinetic energy, (m2/s2) L Receiver length, (m) m ˙ Mass flow, (kg/s) Nu Average Nusselt number of the heated wall, nondimensional qcal Calorimetric heat flux, (W/m2) qHFS Radiative heat flux, (W/m2) Pk Generation of turbulent kinetic energy, (J/kg) Ra Modified Rayleigh number at the heated wall, nondimensional Re Reynolds number at the inlets, nondimensional T amb Ambient temperature, (K) T h ¯ Average temperature of the hot wall, (K) T i ¯ Average temperature of the inlets, (K) T ∞ Temperature of the bulk fluid, (K) U Inlet velocity, (m/s) x, y, z Coordinate system, (m) i, j, k Unity vector components Publisher Copyright: © 2018 Elsevier Ltd

PY - 2019/2/1

Y1 - 2019/2/1

N2 - In this study, a thermal analysis of a finned receiver prototype for a thermosolar tower system is presented. The experimental system consists of parallelepiped aluminum enclosure of 1.2 m high, 1.23 m wide and 0.1 m depth. At the interior, 1232 cylindrical fins with a diameter of 0.0095 m (3/8″) and 0.09 m length increases the heat transfer area up to 225%. The vertical wall receives the incoming solar concentrated radiation from a group of heliostats whilst at the interior a constant flow of water removes the absorbed energy. Experimental temperature profiles were obtained at different heights and depths and a comparison was made with numerical results obtained with the use of commercial CFD software. It was found that the maximum thermal efficiency of the receiver was 94.4%, decreasing as the radiative flux increases.

AB - In this study, a thermal analysis of a finned receiver prototype for a thermosolar tower system is presented. The experimental system consists of parallelepiped aluminum enclosure of 1.2 m high, 1.23 m wide and 0.1 m depth. At the interior, 1232 cylindrical fins with a diameter of 0.0095 m (3/8″) and 0.09 m length increases the heat transfer area up to 225%. The vertical wall receives the incoming solar concentrated radiation from a group of heliostats whilst at the interior a constant flow of water removes the absorbed energy. Experimental temperature profiles were obtained at different heights and depths and a comparison was made with numerical results obtained with the use of commercial CFD software. It was found that the maximum thermal efficiency of the receiver was 94.4%, decreasing as the radiative flux increases.

KW - Concentrated radiation

KW - Heat transfer

KW - Solar tower system

KW - Thermal receiver

UR - http://www.scopus.com/inward/record.url?scp=85053221385&partnerID=8YFLogxK

U2 - 10.1016/j.renene.2018.07.123

DO - 10.1016/j.renene.2018.07.123

M3 - Article

SN - 0960-1481

VL - 131

SP - 1002

EP - 1012

JO - Renewable Energy

JF - Renewable Energy

ER -

Thermal analysis of a finned receiver for a central tower solar system

Abstract

Bibliographical note

Keywords

Access to Document

Other files and links

Fingerprint

Cite this