Published 18 issues per year
ISSN Print: 1064-2285
ISSN Online: 2162-6561
Indexed in
A TEMPERATURE ERROR CORRECTION METHOD FOR A DTR503A NATURALLY VENTILATED RADIATION SHIELD
ABSTRACT
Due to solar radiation exposure, air flowing inside a naturally ventilated radiation shield may produce a measurement error of 0.8°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 obtain the temperature error of a DTR503A 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 DTR503A naturally ventilated radiation shield and an aspirated temperature measurement platform are characterized in the same environment to allow intercomparison. The aspirated temperature measurement platform serves as an air temperature reference. The mean temperature error given by the intercomparison experiments is 0.66°C, and the mean temperature error given by the correction equation is 0.67°C. This correction equation allows the temperature error to be reduced by approximately 98.5%. The mean absolute error and the root mean square error between the temperature errors given by the correction equation and the temperature errors given by the experiments are 0.073°C and 0.079°C, respectively. The correction equation is only for the DTR503A naturally ventilated radiation shield, but the temperature error correction method can be used on a variety of shields.