Heat Transfer Performance During Condensation Inside Spiralled Micro-Fin Tubes  

Oleh:

Liebenberg, Leon ; Bukasa, Jean-Pierre M. ; Meyer, Josua P.

Jenis: Article from Bulletin/Magazine
Dalam koleksi: Journal of Heat Transfer vol. 126 no. 3 (Jun. 2004), page 321-328.
Topik: heat transfer; heat transfer; performance; condensation; micro - fin tubes

Ketersediaan

Perpustakaan Pusat (Semanggi) Nomor Panggil: JJ90.8 Non-tandon: 1 (dapat dipinjam: 0) Tandon: tidak ada

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Isi artikel

The effect of the spiral angle on the heat transfer performance in micro - fin tube condensers has not yet been clearly established because other geometric parameters affecting the heat transfer performance were simultaneously varied in previous studies. This paper reports on the influence of the spiral angle on the heat transfer during condensation inside spiralled micro - fin tubes having all other geometric parameters constant. Tests were conducted for condensation of R-22, R-134a, and R-407C inside a smooth (9.52 mm outer diameter) and three micro - fin tubes with approximately the same diameter, having spiral angles of 10 deg, 18 deg, and 37 deg, respectively. Experimental results indicated a heat transfer augmentation with spiral angle increase. A new semi - empirical predictive correlation was developed for practical design of spiralled micro - fin tubes. The proposed new correlation predicted the majority of experimental results of the present study within a deviation zone of ± 20 %.

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