Parabolik Oluk Güneş Kolektörü Isı Transferi Özelliklerinin Alıcı Boruya Kanatçık İlavesi ile İyileştirilmesi

Öz

Parabolik oluk güneş kolektörleri güneş enerjisi uygulama alanında oldukça geniş yer tutmaktadır. Düz tip ve vakum tüp kolektörlere göre yüksek odaklanma oranı sayesinde alıcı boru içerisinden geçen ısı transferi akışkanında daha yüksek çıkış sıcaklıkları elde edilebilmekte ve bu yüzden elektrik üretimi vb. yüksek sıcaklık prosesi gerektiren alanlarda kullanılmaktadır. Alıcı boru içerisine kanatçık, türbülatör ilavesi veya alıcı borunun oluklu imal edilmesi ile ısı transferi özelliklerinde ciddi iyileştirmeler elde edilmektedir. Bu çalışmada alıcı boru içerisinde eğrisel kanatçık ilavesi ile akışkana ısı transferi özeliklerinin artışı hesaplamalı akışkanlar dinamiği (HAD) analizi ile incelenmiştir. Analizde kullanılan Reynoldss sayı aralığı 3000 ile 21000 arası olarak belirlenmiştir. Elde edilen sonuçlara göre düz boruya göre altı kanatçıklı boruda Nusselt sayısı en fazla 1,34 kat, oniki kanatçıklı boruda 3,06 kat artış göstermiştir.

Anahtar Kelimeler

• Güneş Enerjisi
• parabolik kolektör
• Kanatçık
• Alıcı Boru
• Isı Transferi İyileştirmesi

Enhancement of Parabolic Trough Solar Collector Heat Transfer Properties by Insert Fins to the Receiver Pipe

Öz

Parabolic trough solar collectors occupy a very large place in the field of solar energy application. Thanks to the higher focusing ratio compared to flat type and vacuum tube collectors, higher outlet temperatures can be obtained in the heat transfer fluid passing through the receiver pipe, and therefore electricity generation etc. It is used in areas that require high temperature processing. Significant improvements in heat transfer properties are achieved by adding fins, turbulators, or corrugated receiving pipe into the receiving pipe. In this study, the increase in heat transfer properties to the fluid with the addition of curvilinear fins in the receiver pipe was investigated by computational fluid dynamics (CFD) analysis. The Reynoldss number range used in the analysis was determined as between 3000 and 21000. According to the results obtained, the Nusselt number increased by 1,34 times in the six-finned pipe and 3,06 times in the twelve-finned pipe compared to the straight pipe.

Anahtar Kelimeler

• Solar energy
• Parabolic collector
• Fin
• Receiver Pipe
• Enhancement Heat Transfer

Kaynakça

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