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131383

Heating the air in buildings by evacuated tube solar collector used AL2O3/ water nanofluid at Cairo-Egypt climates

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Last updated: 04 Jan 2025

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Abstract

  The present paper investigates experimentally the performance of the evacuated tube heat pipe solar collector in Cairo-Egypt climate conditions. The experimental work conducts by using an evacuated solar collector with nanofluid in indirect building heating. The investigation parameters are tilt angle, AL2O3 nanoparticles concentrations, mass flow rates, water temperature difference, useful heat gain, collector thermal efficiency, air temperature difference, thermal optical efficiency and energy loss coefficients. The results show that the tilt angle 45o gives best performance characteristics of the collector. At tilt angle of 45o, 90 kg/h flow rate, 0.2% of nanofluid concentration and at 1:30 PM the air temperature difference increases by 16.4% than the reference fluid. The collector thermal efficiency increases by high concentrations of nanofluid, which reaches to 49%, 44.8%, 42.9% and 39% at a nanofluid concentration of 0.2%, 0.15%, 0.1% and 0% at 1:30 PM and 90kg/h, respectively. Also at low mass flow rate the air temperature difference increases by 9oC at 0.2% of nanofluid concentration.

DOI

10.21608/erj.2019.131383

Keywords

evacuated tube, Nanofluid, performance, Solar collector, heating

Authors

First Name

Momen

Last Name

I. Radwan

MiddleName

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Affiliation

Refrigeration and Air-Conditioning Technology Dpt, Faculty of Industrial Education, Helwan University,

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City

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Orcid

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First Name

Abdalla

Last Name

Gomaa,

MiddleName

-

Affiliation

Refrigeration and Air-Conditioning Technology Dpt, Faculty of Industrial Education, Helwan University,

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City

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Orcid

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First Name

Fifi

Last Name

N. M. Elwekeel,

MiddleName

-

Affiliation

Refrigeration and Air-Conditioning Technology Dpt, Faculty of Industrial Education, Helwan University,

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City

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Orcid

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First Name

Mahmoud

Last Name

Abdelmagied,

MiddleName

-

Affiliation

Refrigeration and Air-Conditioning Technology Dpt, Faculty of Industrial Education, Helwan University,

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City

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Orcid

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Volume

164

Article Issue

0

Related Issue

18567

Issue Date

2019-12-01

Receive Date

2020-12-21

Publish Date

2019-12-01

Page Start

229

Page End

249

Print ISSN

1110-5615

Article File

ERJ_Volume 164_Issue 0_Pages 229-249.pdf

PDF . 968.4kB

Link

https://erj.journals.ekb.eg/article_131383.html

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https://erj.journals.ekb.eg/service?article_code=131383

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14

Type

Original Article

Type Code

998

Publication Type

Journal

Publication Title

Engineering Research Journal

Publication Link

https://erj.journals.ekb.eg/

MainTitle

Heating the air in buildings by evacuated tube solar collector used AL2O3/ water nanofluid at Cairo-Egypt climates

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Article

Created At

22 Jan 2023