|
Comparison of clear sky models for estimating downward longwave radiation in Thailand |
|---|---|
| รหัสดีโอไอ | |
| Title | Comparison of clear sky models for estimating downward longwave radiation in Thailand |
| Creator | 1. Panatcha Anusasananan 2. Itsara Masiri 3. Serm Janjai |
| Publisher | Joint Graduate School of Energy and Environment |
| Publication Year | 2557 |
| Keyword | downward longwave radiation, clear sky models |
| Abstract | In this study, downward longwave radiation data collected on clear sky days at three different sites in Thailand were compared with the values estimated from 12 clear sky longwave radiation models. The downward longwave radiation data used in the comparisons were collected using pyrgeometers installed at three solar monitoring stations located in Nakhon Pathom, Chiang Mai and Ubon Ratchathani. The comparisons showed that model of Prata (1996) gave the best agreement with the values collected at Nakhon Pathom station with mean bias difference (MBD) and root mean square difference (RMSD) of -0.14% and 2.74%, respectively. For Chiang Mai station, the best fit was obtained from model of Brusaert (1982) with MBD and RMSD of -0.43% and 3.94%, respectively. On the other hand, the values obtained from model of Sutterlund (1979) showed the best agreement with the data collected at Ubon Ratchathani station with MBD and RMSD of 0.36% and 3.80%, respectively. Comparison of hourly average longwave radiation derived from all stations showed that the best model for estimating longwave radiation in Thailand is model of Brusaert (1982). |
| ISBN | 978-616-92228-1-1 |
