Supercritical Carbon Dioxide Heat Transfer Data for 0.75 mm Square Microchannels with Horizontal, Single-Side Heated Boundary Condition at Reduced Pressure from 1.03 to 1.1

The attached heat transfer dataset was obtained at Oregon State University in the Thermal Energy Systems and Transport (TEST) Laboratory. Six different testing conditions were investigated with a total of 70 data points, varying the 1.) reduced pressure (P/P_crit of 1.03 and 1.1), 2.) mass flux (500 and 1000 kg m^-2 s^-1), 3.) inlet temperature (T_in = 16 ^oC to 50 ^oC), and 4.) applied heat flux (q" = 20 and 40 W cm^-2). The applied heat flux is on the bottom surface of a horizontal test section with a heated length of 20 mm, more dimension details can be found in the attached dataset and the reference.<br>This attached dataset contains both the measured experimental variables and calculated quantities. The wall temperatures, heat transfer coefficient, and corresponding uncertainty were evaluated using an integrated 2-D and 3-D modeling approach, described in the cited references. Some key details about the data are as follows:1. The values for each measured variable represent the average values of the raw data points (approx. 600) that were directly measured by various sensors.2. The attached file has 6 individual sheets which correspond to the 6 test cases considered in the current investigation.3. The attached file contains a detailed key which can be used to interpret the data set presented in each individual sheet. The sheets are named as, XX-YY-ZZ which represents the experimental conditions for the particular data set.• XX represents the reduced pressure• YY represents the mass flux in kg m^-2 s^-1• ZZ represents the measured heat flux at the flux meter location in W cm^-2<br><br>

本附带的传热数据集采自俄勒冈州立大学热能系统与输运（TEST, Thermal Energy Systems and Transport）实验室。本次研究共设置6种不同测试工况，累计获取70组数据点，调控的实验变量包括：1）对比压力（reduced pressure，P/P_crit），取值为1.03与1.1；2）质量通量（mass flux），取值为500与1000 kg·m⁻²·s⁻¹；3）入口温度（T_in），范围为16℃至50℃；4）施加热流密度（applied heat flux，q"），取值为20与40 W·cm⁻²。施加的热流密度作用于水平测试段的底面，该测试段的加热段长度为20 mm，更多尺寸细节可参见附带数据集及所附参考文献。
本附带数据集同时包含实测实验变量与计算得到的物理量。研究采用集成二维与三维建模方法，对壁面温度、传热系数及对应不确定度进行了评估，相关建模方法详见所引用的参考文献。该数据集的关键细节如下：
1. 各实测变量的取值为各类传感器直接采集的原始数据（约600组）的平均值。
2. 附带文件包含6个独立工作表，分别对应本次研究中的6个测试工况。
3. 附带文件包含详细的数据说明表，可用于解读每个独立工作表中的数据集。各工作表采用XX-YY-ZZ的命名格式，代表对应数据集的实验工况：
• XX代表对比压力
• YY代表质量通量，单位为kg·m⁻²·s⁻¹
• ZZ代表热流计测点处的实测热流密度，单位为W·cm⁻²