A temperature error correction method for a naturally ventilated radiation shield

作者：Yang Jie^*; Liu Qingquan; Dai Wei; Ding Rrenhui

来源：Journal of Atmospheric and Solar-Terrestrial Physics, 2016, 149: 40-45.

DOI：10.1016/j.jastp.2016.09.010

• Temperature error
• Surface air temperature
• Computational Fluid Dynamics
• Naturally ventilated radiation shield

Due to solar radiation exposure, air flowing inside a naturally ventilated radiation shield may produce a measurement error of 0.8 degrees C or higher. To improve the air temperature observation accuracy, a temperature error correction method is proposed. The correction method is based on a Computational Fluid Dynamics (CFD) method and a Genetic Algorithm (GA) method. The CFD method is implemented to analyze and calculate the temperature errors of a naturally ventilated radiation shield under various environmental conditions. Then, a temperature error correction equation is obtained by fitting the CFD results using the GA method. To verify the performance of the correction equation, the naturally ventilated radiation shield and an aspirated temperature measurement platform are characterized in the same environment to conduct the intercomparison. The aspirated temperature measurement platform serves as an air temperature reference. The mean temperature error given by measurements is 0.36 degrees C, and the mean temperature error given by correction equation is 0.34 degrees C. This correction equation allows the temperature error to be reduced by approximately 95%. The mean absolute error (MAE) and the root mean square error (RMSE) between the temperature errors given by the correction equation and the temperature errors given by the measurements are 0.07 degrees C and 0.08 degrees C, respectively.

• 出版日期2016-11