Evaporation Heat Transfer and Pressure Drop in A Horizontal Tubes With Stripe-Type Inserts Using Refrigerant 600a  

Oleh:

K.-J. Jang ; S.-S. Hsieh ; Y.-C. Tsai

Jenis: Article from Bulletin/Magazine
Dalam koleksi: Journal of Heat Transfer vol. 122 no. 2 (May 2000), page 387-390.
Topik: heat of evaporation; evaporation; heat transfer; pressure drop; horizontal tubes; stripe - type inserts; refrigerant 600a

Ketersediaan

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

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Isi artikel

Results of a study on saturated boiling heat transfer of refrigerant R - 600a in horizontal tubes (ID = 10.6 mm) with strip - type inserts (longitudinal strip LS with / without perforated holes and cross - strip CS inserts) are reported. Local heat transfer coefficients are measured for a range of heat flux (9.1 ~ 31.2 kW / m2), mass velocity (8.23 ~ 603.3 kg / m2s), and equilibrium mass quality (0.8) and the influences were studied. The data were compared with the performance of the corresponding smooth tubes. Enhancement factors are presented and discussed. Pressure drop measurement was also conducted and it is found that both single - phase and two -phase pressure drops increase with increasing heat flux levels and mass velocities.

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