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Antifriz Su Karışımının Eş Merkezli-Borulu Isı Değiştiricideki Isı Transfer Performansının Deneysel İncelenmesi

The Experimental Investigation of Heat Transfer Performance of Antifrezee-Water Mixture In Concentric Tube Heat Exchanger

Journal Name:

  • Cumhuriyet Üniversitesi Fen Fakültesi Fen Bilimleri Dergisi

Publication Year:

  • 2007

Key Words:

Keywords (Original Language):

Author NameUniversity of AuthorFaculty of Author
Abstract (2. Language): 
In this paper, some experiments, releated to heat convection occuring during the heat transfer from antifreeze (Ethylene-Glycol mix., %50 - %50, respectively)-water mixture (%75 - %25, %50 - %50, %25 - %75, respectively) (hot fluid) to water (cold fluid) in concentric tube heat exchangers, have been performed and the general performance of the system has been investigated. Using the data which was obtained from the experiments, logarithmic mean temperature difference (LOSF), the coefficient of total heat transfer with conduction (U), the coefficients of the inside and outside surface heat transfer with convection (hask - hso) and heat transfer rates (Q) in the counter and parallel flow have been compared in graphics. From the exeperimental data, it was found out that opposite flow transfers average 300 W heat more than paralel flow in the concentric tube heat exchanger.
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Abstract (Original Language): 
Bu çalışmada aynı merkezli-borulu ısı değiştiricilerde farklı karışım oranlarındaki (%75-%25, %50-%50, %25-%50) antifiriz (Ethylene-Glycol karışımı, %50 - %50) su karışımından (sıcak akışkan) suya (soğuk su) ısı geçişi esnasında meydana gelen ısı transfer özelliklerinin belirlenmesi ile ilgili deneyler yapılmış ve sistem genel performansı araştırılmıştır. Deneylerden elde edilen verilerle logaritmik ortalama sıcaklık farkı (LOSF), toplam ısı transfer katsayısı (U), iç ve dış yüzey ısı taşınım katsayıları (hsı - hso) ile karşıt ve paralel akışlardaki ısı transfer oranları (Q) grafikler yardımıyla karşılaştırılmıştır. Deneysel sonuçların incelenmesinden aynı merkezli-borulu ısı değiştiricide, sıcak akışkanın karşıt akışta paralel akışa göre yaklaşık 300 W'lık daha fazla ısı transferi olduğu görülmüştür.
FULL TEXT (PDF): 
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  • Turkish

REFERENCES

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