Numerical Analysis of a Solar Air Heater with Absorber Plates Containing a Variable Number of Holes

Murat Öztürk; Erdem Çiftçi

Makale detayları

Numerical Analysis of a Solar Air Heater with Absorber Plates Containing a Variable Number of Holes

Yazarlar:

Murat Öztürk | Erdem Çiftçi

Yayıncı:

Gazi University

Ana Başlıklar:

Güneş Enerjisi Sistemleri

Dergi:

Gazi Üniversitesi Fen Bilimleri Dergisi Part C: Tasarım ve Teknoloji Vol.11 Issue 4, pp.1162-1170

Belge Tipi:

Makale

Yayın Tarihi:

12/2023

Belge Dili:

Türkçe

Document ID (Org No.):

2001306959

pISSN:

2147-9526

Anahtar kelimeler:

Özet:

 Increases in the world population directly affect the demands for energy. There is a search for different energy sources in order to respond to energy demands that are directly affected by population growth and to ensure a sustainable future. Electricity production and thermal applications from solar energy, the most basic of renewable energy sources that have become popular recently, continue to progress. In this study, it was aimed to increase the performance of solar air heaters used to obtain thermal energy from solar energy, and solar air heater models with different absorbent surfaces were developed. The analyzes of these developed models were carried out with the Computational Fluid Dynamics CFD approach and the results were evaluated. Initially, a conventional flat absorber plate solar air heater was modeled. Then, 2, 4 and 8 holes were added to the flat plate, respectively, and system analyzes were carried out under the same conditions. As a result of these analyses, pressure drops at similar rates were observed and air flow rates decreased at a very similar rate. In addition, the temperature differences between the inlet and outlet points were obtained as 12.6, 10, 13.5 and 16.2 for the flat plate, 2-hole, 4-hole and 8-hole model, respectively. Based on the results obtained, it has been observed that the system performance increases with the number of holes and that the holes created significantly improve heat transfer by creating a turbulence effect.

 Increases in the world population directly affect the demands for energy. There is a search for different energy sources in order to respond to energy demands that are directly affected by population growth and to ensure a sustainable future. Electricity production and thermal applications from solar energy, the most basic of renewable energy sources that have become popular recently, continue to progress. In this study, it was aimed to increase the performance of solar air heaters used to obtain thermal energy from solar energy, and solar air heater models with different absorbent surfaces were developed. The analyzes of these developed models were carried out with the Computational Fluid Dynamics CFD approach and the results were evaluated. Initially, a conventional flat absorber plate solar air heater was modeled. Then, 2, 4 and 8 holes were added to the flat plate, respectively, and system analyzes were carried out under the same conditions. As a result of these analyses, pressure drops at similar rates were observed and air flow rates decreased at a very similar rate. In addition, the temperature differences between the inlet and outlet points were obtained as 12.6, 10, 13.5 and 16.2 for the flat plate, 2-hole, 4-hole and 8-hole model, respectively. Based on the results obtained, it has been observed that the system performance increases with the number of holes and that the holes created significantly improve heat transfer by creating a turbulence effect.

 Increases in the world population directly affect the demands for energy. There is a search for different energy sources in order to respond to energy demands that are directly affected by population growth and to ensure a sustainable future. Electricity production and thermal applications from solar energy, the most basic of renewable energy sources that have become popular recently, continue to progress. In this study, it was aimed to increase the performance of solar air heaters used to obtain thermal energy from solar energy, and solar air heater models with different absorbent surfaces were developed. The analyzes of these developed models were carried out with the Computational Fluid Dynamics CFD approach and the results were evaluated. Initially, a conventional flat absorber plate solar air heater was modeled. Then, 2, 4 and 8 holes were added to the flat plate, respectively, and system analyzes were carried out under the same conditions. As a result of these analyses, pressure drops at similar rates were observed and air flow rates decreased at a very similar rate. In addition, the temperature differences between the inlet and outlet points were obtained as 12.6, 10, 13.5 and 16.2 for the flat plate, 2-hole, 4-hole and 8-hole model, respectively. Based on the results obtained, it has been observed that the system performance increases with the number of holes and that the holes created significantly improve heat transfer by creating a turbulence effect.

 Dünya nüfusundaki meydana gelen artışlar, enerjiye olan talepleri de doğrudan etkilemektedir. Nüfus artışı ile doğrudan etkilenen enerji taleplerine karşı tepki verebilmek ve sürdürülebilir bir gelecek sağlamak amacıyla farklı enerji kaynakları arayışları ortaya çıkmaktadır. Son zamanlarda popüler bir hale gelen yenilenebilir enerji kaynaklarının en temeli olan güneş enerjisinden elektrik üretimi ve ısıl uygulamalar ilerlemeye devam etmektedir. Bu çalışmada güneş enerjisinden ısıl enerji elde etmek amacıyla kullanılan güneş enerjili hava ısıtıcıların performansının arttırılması amaçlanmış ve farklı emici yüzeylere sahip güneş enerjili hava ısıtıcısı modelleri geliştirilmiştir. Geliştirilmiş olan bu modellerin analizleri Hesaplamalı Akışkanlar Dinamiği HAD yaklaşımı ile gerçekleştirilmiş ve sonuçlar değerlendirilmiştir. Başlangıçta geleneksel düz emici plakalı güneş enerjili hava ısıtıcısı modellenmiştir. Daha sonra düz plakaya sırasıyla 2, 4 ve 8 adet delikler eklenmiş ve aynı şartlar altında sistem analizleri gerçekleştirilmiştir. Yapılan bu analizler sonucu benzer oranlarda basınç düşüşleri görülmüş ve hava akış hızları oldukça yakın oranda azalmıştır. Bunun yanı sıra giriş ve çıkış noktası arasındaki sıcaklık farkları düz plakalı, 2 delikli, 4 delikli ve 8 delikli model için sırasıyla 12,6, 10, 13,5 ve 16,2 olarak elde edilmiştir. Elde edilen sonuçlara bağlı olarak delik sayısı ile sistem performansında arttığı ve oluşturulan deliklerin türbülans etkisi yaratarak ısı transferini önemli ölçüde iyileştirdiği gözlemlenmiştir.

Makale detayları

Numerical Analysis of a Solar Air Heater with Absorber Plates Containing a Variable Number of Holes

Yazarlar:

Murat Öztürk | Erdem Çiftçi

Yayıncı:

Gazi University

Ana Başlıklar:

Güneş Enerjisi Sistemleri

Dergi:

Gazi Üniversitesi Fen Bilimleri Dergisi Part C: Tasarım ve Teknoloji Vol.11 Issue 4, pp.1162-1170

Belge Tipi:

Makale

Yayın Tarihi:

12/2023

Belge Dili:

Türkçe

Document ID (Org No.):

2001306959

pISSN:

2147-9526

Solar Energy

Computational Fluid Dynamics (CFD)

Absorber Plate

Thermal SystemsGüneş Enerjisi

Hesaplamalı Akışkanlar Dinamiği (HAD)

Emici Plaka

Termal Sistemler

Sayı

Makale detayları

Yazarlar: Murat Öztürk | Erdem Çiftçi

Yayıncı: Gazi University

Ana Başlıklar: Güneş Enerjisi Sistemleri

Dergi: Gazi Üniversitesi Fen Bilimleri Dergisi Part C: Tasarım ve Teknoloji Vol.11 Issue 4, pp.1162-1170

Belge Tipi: Makale

Yayın Tarihi: 12/2023

Belge Dili: Türkçe

Document ID (Org No.): 2001306959

pISSN: 2147-9526

Sayı

Yazarlar:

Murat Öztürk | Erdem Çiftçi

Yayıncı:

Gazi University

Ana Başlıklar:

Güneş Enerjisi Sistemleri

Dergi:

Gazi Üniversitesi Fen Bilimleri Dergisi Part C: Tasarım ve Teknoloji Vol.11 Issue 4, pp.1162-1170

Belge Tipi:

Makale

Yayın Tarihi:

12/2023

Belge Dili:

Türkçe

Document ID (Org No.):

2001306959

pISSN:

2147-9526