Experimental Data for Near Critical Turbulent Heat Transfer of Supercritical Carbon Dioxide in Rectangular Microchannels subject to Uniform Single Wall Heating

The attached data were obtained at Oregon State University in the Thermal Energy Systems and Transport (TEST) Laboratory. The experiments were conducted using the supercritical facility with 99.5% (food grade) carbon dioxide (CO2). Experiments were conducted in a horizontally oriented test section with a channel hydraulic diameter of 923 micron and an aspect ratio of 3.33. Experimental variables included the mass flux (430 < G < 800kg m^-2 s^-1, heat flux (5.7< q" <14.12 W cm^-2, inlet temperatures (31< T_inlet <32.9^oC), and a reduced pressure (P_R) of 1.04. The test section was fabricated using Inconel-718, Torlon 4203, and stainless steel. Infrared thermography was used to obtain local heat transfer data. Heating was applied and limited to the bottom wall of the flow channels.The data reported in the attached sheets contains the experimentally measured:

1. Surface temperatures of the heated metal (T_surf)

2. Heat transfer coefficients (HTC)

3. Experimentally measured inlet, exit, and channel absolute pressure. (T_inlet, T_exit, Abs_P)

4. Bulk fluid temperature along the flow channel. (T_bulk)

5. Applied heat flux (q)

6. Channel mass flux (G)

Please note that the surface temperatures (T_surf), bulk fluid temperatures (T_bulk), and the heat transfer coefficients (HTC) correspond to the region of the test section represented by the ''Interrogation Window'' in the figure contained in the attached sheet.

This means that the heat duty of the inlet header region needs to be added to the experimentally measured inlet temperature to obtain the bulk fluid temperature at the inlet of the flow channel. In a similar fashion, the heat duty of the exit header region needs to be added to the bulk fluid temperature at the end to interrogation window to obtain the experimentally measured bulk fluid temperature.

The heat transfer coefficients and the surface temperature measurements reported here are an average of seven data points (pixels) across the width of the interrogation window.