| Title |
Study on Pressure Drop and Condensation Heat Transfer Characteristics of R-404A in Brazed Plate Heat Exchanger |
| Keywords |
R-404A, Brazed plate heat exchanger ; 용접형 판형열교환기 ; Condensation heat- transfer ; 응축열전달 ; Pressure drop ; 압력강하 |
| Abstract |
Experimental study has been carried out on the characteristics of pressure drop and heat transfer of brazed plate heat exchangers using R-404A. Data are presented for the following range of variables: the mass flux (20∼80 kg/m2s), chevron angle and inlet pressure of the refrigerant (1.4 and 1.6 MPa). For both subcooled and two-phase flow, as chevron angle increases, pressure drop and heat transfer coefficient decrease. Condensation heat transfer coefficient and pressure drop were compared with the previously proposed correlations. Among them, Traviss correlation agreed with experimental results within －35∼－82% for heat transfer coefficient and －73∼93% for pressure drop. |