In-door experimental analysis of concentrated and non-concentrated evacuated tube heat pipe collectors for medium temperature applications

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Abstract

The paper presents the performance of an evacuated tube heat pipe solar collector compared to a concentratedevacuated tube single-sided coated heat pipe absorber for medium temperature applications.The aperture areas of the solar collectors were 0.107 m2 and 0.2004 m2 for the evacuated tube heat pipeand the concentrated evacuated tube single-sided coated heat pipe absorber, respectively. Experimentswere conducted at five different transverse angles (0–40◦) with a collector title angle of 60◦ to the horizontal.These solar collectors were tested over a range of operating temperatures and the mean fluid andambient air temperature differential increase and outlet and inlet fluid temperature differential, energycollection rates and efficiency and the heat loss coefficients of each solar collector was experimentallymeasured, calculated and compared to each other. The concentrated evacuated tube heat pipe solar collectorshowed an improvement of 30% and 25.42% in overall average outlet and inlet fluid temperaturedifferential and total daily energy collection, respectively compared to the non-concentrated evacuatedtube heat pipe collectors.
LanguageEnglish
Pages674-681
JournalEnergy and Buildings
Volume47
DOIs
Publication statusPublished - Mar 2012

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Heat pipes
Solar collectors
Fluids
Temperature
Tubes (components)
Heat losses
Air

Cite this

@article{218a88e52f9940b1bf80fefe8a0cdeae,
title = "In-door experimental analysis of concentrated and non-concentrated evacuated tube heat pipe collectors for medium temperature applications",
abstract = "The paper presents the performance of an evacuated tube heat pipe solar collector compared to a concentratedevacuated tube single-sided coated heat pipe absorber for medium temperature applications.The aperture areas of the solar collectors were 0.107 m2 and 0.2004 m2 for the evacuated tube heat pipeand the concentrated evacuated tube single-sided coated heat pipe absorber, respectively. Experimentswere conducted at five different transverse angles (0–40◦) with a collector title angle of 60◦ to the horizontal.These solar collectors were tested over a range of operating temperatures and the mean fluid andambient air temperature differential increase and outlet and inlet fluid temperature differential, energycollection rates and efficiency and the heat loss coefficients of each solar collector was experimentallymeasured, calculated and compared to each other. The concentrated evacuated tube heat pipe solar collectorshowed an improvement of 30{\%} and 25.42{\%} in overall average outlet and inlet fluid temperaturedifferential and total daily energy collection, respectively compared to the non-concentrated evacuatedtube heat pipe collectors.",
author = "{Nchelatebe Nkwetta}, D and Mervyn Smyth and Aggelos Zacharopoulos and Trevor Hyde",
year = "2012",
month = "3",
doi = "10.1016/j.enbuild.2012.01.010",
language = "English",
volume = "47",
pages = "674--681",
journal = "Energy and Buildings",
issn = "0378-7788",
publisher = "Elsevier",

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TY - JOUR

T1 - In-door experimental analysis of concentrated and non-concentrated evacuated tube heat pipe collectors for medium temperature applications

AU - Nchelatebe Nkwetta, D

AU - Smyth, Mervyn

AU - Zacharopoulos, Aggelos

AU - Hyde, Trevor

PY - 2012/3

Y1 - 2012/3

N2 - The paper presents the performance of an evacuated tube heat pipe solar collector compared to a concentratedevacuated tube single-sided coated heat pipe absorber for medium temperature applications.The aperture areas of the solar collectors were 0.107 m2 and 0.2004 m2 for the evacuated tube heat pipeand the concentrated evacuated tube single-sided coated heat pipe absorber, respectively. Experimentswere conducted at five different transverse angles (0–40◦) with a collector title angle of 60◦ to the horizontal.These solar collectors were tested over a range of operating temperatures and the mean fluid andambient air temperature differential increase and outlet and inlet fluid temperature differential, energycollection rates and efficiency and the heat loss coefficients of each solar collector was experimentallymeasured, calculated and compared to each other. The concentrated evacuated tube heat pipe solar collectorshowed an improvement of 30% and 25.42% in overall average outlet and inlet fluid temperaturedifferential and total daily energy collection, respectively compared to the non-concentrated evacuatedtube heat pipe collectors.

AB - The paper presents the performance of an evacuated tube heat pipe solar collector compared to a concentratedevacuated tube single-sided coated heat pipe absorber for medium temperature applications.The aperture areas of the solar collectors were 0.107 m2 and 0.2004 m2 for the evacuated tube heat pipeand the concentrated evacuated tube single-sided coated heat pipe absorber, respectively. Experimentswere conducted at five different transverse angles (0–40◦) with a collector title angle of 60◦ to the horizontal.These solar collectors were tested over a range of operating temperatures and the mean fluid andambient air temperature differential increase and outlet and inlet fluid temperature differential, energycollection rates and efficiency and the heat loss coefficients of each solar collector was experimentallymeasured, calculated and compared to each other. The concentrated evacuated tube heat pipe solar collectorshowed an improvement of 30% and 25.42% in overall average outlet and inlet fluid temperaturedifferential and total daily energy collection, respectively compared to the non-concentrated evacuatedtube heat pipe collectors.

U2 - 10.1016/j.enbuild.2012.01.010

DO - 10.1016/j.enbuild.2012.01.010

M3 - Article

VL - 47

SP - 674

EP - 681

JO - Energy and Buildings

T2 - Energy and Buildings

JF - Energy and Buildings

SN - 0378-7788

ER -