Ss. Hsieh et Pt. Hsu, NUCLEATE BOILING CHARACTERISTICS OF R-114, DISTILLED WATER (H2O) AND R-134A ON PLAIN AND RIB-ROUGHENED TUBE GEOMETRIES, International journal of heat and mass transfer, 37(10), 1994, pp. 1423-1432
Pool nucleate boiling characteristics of R-114, distilled water (H2O)
and R-134a on plain and rib-roughened tubes (rib pitch 39.4 mm, rib he
ight 4 mm, rib width 15 mm. number of element 8, rib angle 30-90-degre
es) geometries were extensively studied. Boiling data for both increas
ing/decreasing heat flux modes as well as the influences of heat flux
level on heat transfer coefficient were presented and discussed. Enhan
cement performance ratios were calculated and compared for three diffe
rent refrigerants and different tube geometries. Furthermore, it is fo
und that smooth tube data agreed quite well with those of previous res
ults.