Boiling Condensation Htc: condensation
filmwise in tube#r410a#round tube Di7mm#horizontal#1085kPa to filmwise in tube#steam#round tube Di25mm#horizontal#101kPa
Boiling and condensation heat transfer coefficients — pool boiling (nucleate, film, CHF), flow boiling (subcooled, saturated, annular, microchannel), and condensation (filmwise, dropwise, in-tube) correlations and data
| regime | record id | applicability notes | correlation name | fluid | geometry | htc high Wm2K (W/m2K) | htc low Wm2K (W/m2K) | htc typical Wm2K (W/m2K) | orientation | pressure kPa (kPa) | sub regime |
|---|---|---|---|---|---|---|---|---|---|---|---|
| condensation | filmwise in tube#r410a#round tube Di7mm#horizontal#1085kPa | In-tube condensation R-410A horizontal tube Di=7mm; higher mass flux needed to maintain annular flow vs R-134a; used in residential and commercial air conditioning condensers; high pressure system | Dobson-Chato 1998 / Cavallini 2002 | r410a | round tube Di7mm | 16,000 | 4,000 | 8,000 | horizontal | 1,085 | filmwise in tube |
| condensation | filmwise in tube#steam#round tube Di25mm#horizontal#101kPa | In-tube filmwise condensation of steam in horizontal smooth tube Di=25mm; annular flow regime x>0.7; gravity-dominated at low G; Dobson-Chato applicable G=75-400 kg/m2s; two-regime model (annular vs stratified-wavy) | Dobson-Chato 1998 / Cavallini 2002 | steam | round tube Di25mm | 10,000 | 2,000 | 5,000 | horizontal | 101.3 | filmwise in tube |
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