An Experimental Comparison of the Performance of Various Evacuated Tube Solar Collector Designs TRANSLATE with x English Arabic Hebrew Polish Bulgarian Hindi Portuguese Catalan Hmong Daw Romanian Chinese Simplified Hungarian Russian Chinese Traditional Indonesian Slovak Czech Italian Slovenian Danish Japanese Spanish Dutch Klingon Swedish English Korean Thai Estonian Latvian Turkish Finnish Lithuanian Ukrainian French Malay Urdu German Maltese Vietnamese Greek Norwegian Welsh Haitian Creole Persian // TRANSLATE with COPY THE URL BELOW Back EMBED THE SNIPPET BELOW IN YOUR SITE Enable collaborative features and customize widget: Bing Webmaster Portal Back //

Author:

Said Sana1ORCID,Mellouli Sofiene23,Alqahtani Talal4ORCID,Algarni Salem4ORCID,Ajjel Ridha1,Ghachem Kaouther5ORCID,Kolsi Lioua67ORCID

Affiliation:

1. Laboratory of Energy and Materials (LabEM-LR11ES34), Higher School of Science and Technology of Hammam Sousse (ESSTHS), University of Sousse, Street Lamine Abbassi, Hammam Sousse 4011, Tunisia

2. Mechanical Engineering Department, College of Engineering, Jazan University, Jazan 45142, Saudi Arabia

3. Laboratory of Thermal and Energetic Systems Studies (LESTE), National School of Engineering of Monastir, University of Monastir, Monastir 5000, Tunisia

4. Mechanical Engineering Department, College of Engineering, King Khalid University, Abha 62529, Saudi Arabia

5. Department of Industrial Engineering and Systems, College of Engineering, Princess Nourah Bint Abdulrahman University, P.O. Box 84428, Riyadh 11671, Saudi Arabia

6. Mechanical Engineering Department, College of Engineering, University of Ha’il, Ha’il 55476, Saudi Arabia

7. Laboratory of Metrology and Energy Systems, National Engineering School of Monastir, University of Monastir, Monastir 5035, Tunisia

Abstract

An experimental study was carried out to assess the thermal performance of a few evacuated tube solar collectors (ETSCs) for water heating. The thermal performance of two kinds of ETSC (heat pipe ETSC and direct-flow ETSC) was investigated using an indoor experimental apparatus in lab testing conditions with a solar simulator. Several experimental tests were carried out for the heat pipe ETSC system under different operating conditions, such as the solar intensity (300, 500, and 1000 W/m2) and the tilt angle (0°, 30° and 90°) of the ETSC and the water flow rate (0.6, 1.2, and 2.4 LPM). Moreover, four configurations of direct-flow ETSC (U tube, double U tubes, coaxial tubes, and helical tube) were examined and compared to the conventional heat pipe ETSC. The results of the experiment proved that the ETSC system presents a great performance at higher solar irradiance and lower water flow rates, and the experiments indicated that with a 30° tilt angle, the ETSC reaches the maximum thermal efficiency of 36%. Furthermore, compared to the conventional heat pipe ETSC and the other proposed configurations of direct-flow ETSCs, the helical tube-based ETSC has a better thermal efficiency, 69%, and can be considered a greater potential heat exchanger that can be integrated in ETSCs. To the best of our knowledge, it is the first time this helical tube type been integrated into the ETSC and tested under these conditions. TRANSLATE with x English Arabic Hebrew Polish Bulgarian Hindi Portuguese Catalan Hmong Daw Romanian Chinese Simplified Hungarian Russian Chinese Traditional Indonesian Slovak Czech Italian Slovenian Danish Japanese Spanish Dutch Klingon Swedish English Korean Thai Estonian Latvian Turkish Finnish Lithuanian Ukrainian French Malay Urdu German Maltese Vietnamese Greek Norwegian Welsh Haitian Creole Persian // TRANSLATE with COPY THE URL BELOW Back EMBED THE SNIPPET BELOW IN YOUR SITE Enable collaborative features and customize widget: Bing Webmaster Portal Back //

Funder

King Khalid University

Princess Nourah bint Abdulrahman University

Publisher

MDPI AG

Subject

Management, Monitoring, Policy and Law,Renewable Energy, Sustainability and the Environment,Geography, Planning and Development,Building and Construction

Reference40 articles.

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4. On the integration of phase change materials with evacuated tube solar thermal collectors;Aramesh;Renew. Sustain. Energy Rev.,2020

5. Review Thermal analysis of evacuated solar tube collectors;Arora;J. Pet. Gas Eng.,2011

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