Abstract Flow boiling heat transfer coefficients of R22, R134a, R507, R404A and R410A inside a smooth horizontal tube (6 mm I.D., 6 m length) were measured at a refrigerant mass flux of about 360 kg/m2 s varying the evaporating pressure within the range 3–12 bar, with heat fluxes within the range 11–21 kW/m2. The experimental data are discussed in terms of the heat transfer coefficients as a function of the vapour quality. The experimental results clearly show that the heat transfer coefficients of R134a are always higher than those pertaining to R22 (from a minimum of 6 to a maximum of 45%).
Flow boiling of R22, R134a, R507,R404A and R410A inside a smooth horizontal tube / Greco, Adriana; G. P., Vanoli. - In: INTERNATIONAL JOURNAL OF REFRIGERATION. - ISSN 0140-7007. - STAMPA. - 28:(2005), pp. 872-880.
Flow boiling of R22, R134a, R507,R404A and R410A inside a smooth horizontal tube
GRECO, ADRIANA;
2005
Abstract
Abstract Flow boiling heat transfer coefficients of R22, R134a, R507, R404A and R410A inside a smooth horizontal tube (6 mm I.D., 6 m length) were measured at a refrigerant mass flux of about 360 kg/m2 s varying the evaporating pressure within the range 3–12 bar, with heat fluxes within the range 11–21 kW/m2. The experimental data are discussed in terms of the heat transfer coefficients as a function of the vapour quality. The experimental results clearly show that the heat transfer coefficients of R134a are always higher than those pertaining to R22 (from a minimum of 6 to a maximum of 45%).File | Dimensione | Formato | |
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