دراسة تأثير تبريد الألواح الكهروشمسية بالماء على مردودها وطاقتها الكهربائية المتولدة

Authors

  • علي حمودي

Abstract

يتأثر الأداء الكهربائي للألواح الكهروشمسية بشكل كبير بدرجة حرارة تشغيل الخلايا الكهروشمسية السيليكونية بسبب خصائص السيليكون البلوري المستخدم فيها, فتنخفض الطاقة المتولدة من هذه الخلايا بارتفاع درجة حرارتها. وللحد من هذا الانخفاض في الطاقة تم تبريد الألواح الكهروشمسية باستخدام الماء, وذلك بوضع أنبوب يحوي ثقوب عديدة منتظمة على أعلى اللوح ويجري الماء بشكل حر على سطحه بعدة تدفقات.

فعند التدفق (4.224 l/min.m2) , انخفضت درجة حرارة اللوح بمقدار حتى (20C°), والزيادة المسجلة في الناتج الكهربائي خلال يوم كامل حوالي (12.8%), وارتفع المردود من (8.31%) إلى (9.62%) أي بمقدار (1.31%). وعند التدفق (3.167 l/min.m2), انخفضت درجة حرارة اللوح بمقدار حتى (18C°) , والزيادة المسجلة في الناتج الكهربائي حوالي (9.8%) , وارتفع المردود بمقدار (1.03%). أما عند التدفق (2.112l/min.m2), انخفضت درجة حرارة اللوح بمقدار حتى (15.5C°), والزيادة المسجلة في الناتج الكهربائي حوالي (7.8%), وارتفع المردود بمقدار (0.83%).

كما أن جريان الماء على سطح اللوح الكهروشمسي يقلل ضياعات الانعكاس, لأن قرينة انكسار الماء (1.3) متوسط بين قرينة انكسار الهواء (1) والزجاج (1.5), بالإضافة لذلك يبقى سطح اللوح نظيفاً.

 

The electrical performance of the PV modules can be severely affected by operating temperature of silicon cells due to properties of the crystalline silicon used; the energy generated from these cells decreases with their high temperatures. To reduce this decline in energy, the PV modules use cooling water by placing a tube containing many regular holes on the top end of the module, and water flows on the surface freely in several flows. So, with flow rate (4.224 l/min.m2), module temperature decreases up to (20C°); the record of increased value of electrical yield over the whole day is about (12.8%). and efficiency rises (from 8.31% to 9.62%) of (1.31%). With Flow rate (3.167 l/min.m2), temperature of module decreases up to (18C°); the record of increased value of electrical yield is about (9.8%), and efficiency rises by (1.03%). But with flow rate (2.112 l/min.m2), temperature of module decreases up to (15.5C°); the record of increased value of electrical yield is about (7.8%), and efficiency rises by (0.83%). Furthermore, flow of water on the surface of PV module reduces the reflection losses because the refractive index of water with (1.3) is intermediate between air (1) and glass (1.5). In addition, the surface of module remains clean.

Downloads

Published

2014-04-23

How to Cite

1.
حمودي ع. دراسة تأثير تبريد الألواح الكهروشمسية بالماء على مردودها وطاقتها الكهربائية المتولدة. Tuj-eng [Internet]. 2014Apr.23 [cited 2025Jun.23];36(2). Available from: https://journal.tishreen.edu.sy/index.php/engscnc/article/view/854

Issue

Vol. 36 No. 2 (2014): العلوم الهندسية

Section

Articles

License

Copyright (c) 2014 ttps://creativecommons.org/licenses/by-nc-sa/4.0/

Creative Commons License

This work is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License.

The authors retain the copyright and grant the right to publish in the magazine for the first time with the transfer of the commercial right to Tishreen University Journal for Research and Scientific Studies - Engineering Sciences Series

 Under a CC BY- NC-SA 04 license that allows others to share the work with of the work's authorship and initial publication in this journal. Authors can use a copy of their articles in their scientific activity, and on their scientific websites, provided that the place of publication is indicted in  Tishreen University Journal for Research and Scientific Studies - Engineering Sciences Series   .  The Readers have the right to send, print and subscribe to the initial version of the article, and the title of  Tishreen University Journal for Research and Scientific Studies - Engineering Sciences Series     Publisher

journal uses a CC BY-NC-SA license which mean

You are free to:

  • Adapt — remix, transform, and build upon the material
  •  
  • The licensor cannot revoke these freedoms as long as you follow the license terms.

 

  • Attribution — You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use.
  • NonCommercial — You may not use the material for commercial purposes.
  • ShareAlike — If you remix, transform, or build upon the material, you must distribute your contributions under the same license as the original.
  • No additional restrictions — You may not apply legal terms or technological measures that legally restrict others from doing anything the license permits.