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Heat Transfer Research
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ISSN Imprimir: 1064-2285
ISSN En Línea: 2162-6561

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Heat Transfer Research

DOI: 10.1615/HeatTransRes.2017019111
pages 1421-1432

A TEMPERATURE ERROR CORRECTION METHOD FOR A DTR503A NATURALLY VENTILATED RADIATION SHIELD

Jie Yang
Jiangsu Collaborative Innovation Center on Atmospheric Environment and Equipment Technology, Nanjing 210044, China; Jiangsu Key Laboratory of Meteorological Observation and Information Processing, Nanjing 210044, China
Qingquan Liu
Jiangsu Collaborative Innovation Center on Atmospheric Environment and Equipment Technology, Nanjing 210044, China; Jiangsu Key Laboratory of Meteorological Observation and Information Processing, Nanjing 210044, China
Wei Dai
Key Laboratory of MEMS of the Ministry of Education, Nanjing 210009, China

SINOPSIS

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.