| Title |
An Experimental Study on Heat Transfer and Pressure Drop Characteristics during Supercritical Process of Carbon Dioxide in a Horizontal Tube |
| Keywords |
Carbon dioxide ; 이산화탄소 ; Supercritical process ; 초임계과정 ; Gas cooling ; 가스냉각 ; Heat transfer ; 열전달 ; Pressure drop ; 압력강하 |
| Abstract |
The heat transfer and pressure drop characteristics associated with the gas cooling of the supercritical carbon dioxide in a horizontal tube have been investigated experimentally. This problem is of particular interest in the design of a gas cooler of cooling systems using CO2 refrigerant. The test section is consisted of 6 series of 455mm in length, 4.15 mm ID copper tube, respectively. The effects of the inlet temperature, pressure and mass flow rate on the heat transfer and pressure drop of CO2 in a horizontal tube is studied in detail. The heat transfer coefficient of CO2 is varied by temperature, inlet pressure, and mass flow rate of CO2. This has maximum value at near the pseudocritical temperature. The pressure drop is changed by inlet pressure and mass flow rate of CO2. The results have been compared with those of previous work. The heat transfer correlation at the supercritical gas cooling process is also suggested. |