04047cas a2200409 a 4500 20260818222310.0 111006s1977 th uu|m rtt 0| a1eng d .b1063485x AIT Thesis no. 1255 Huq, Md. Maminul Statistical analysis of hourly solar radiation in Thailand Bangkok : Asian Institute of Technology, 1977 126 p. Thesis ; no. 1255 A thesis submitted in partial fulfillment of the requirements for the degree of Master of Engineering of the Asian Institute of Technology, Bangkok, Thailand Thesis (M.Eng.) - Asian Institute of Technology, 1977 The existing time series analysis of the daily totals of solar radiation at Bangkok was refined by dividing the daily totals of solar radiation into six classes of width 100 cal.cm-2.d-1. Comparisons of the simulations by the purely random model and the Markov chain model with the observed series of six radiation classes for different seasons of the year were made. The better representation by second order theory (Markov chain model) shows spells of fine weather with higher radiation amounts in the spring, and spells of bad weather in the summer and autumn. The hourly radiation amounts in five year s of measurements at Bangkok and Chiang Mai were converted from zone mean time to apparent solar time by taking into account the effect of the equation of time and the station latitude and longitude. Dividing the daily totals of solar radiation into classes of width 100 cal.cm-2.d-1 and the hourly radiation into classes of width 10 cal.cm-2.d-1 , fluctuations in the hourly solar radiation among these classes were examined for different seasons of the year. During the dry season in spring and winter uniformly high radiation amounts were found. During the wet season in summer and autumn, the distributions were more dispersed. The percentage distributions of a cloudiness factor K, defined to be the ratio between the hourly observed radiation amounts and the maximum possible hourly radiation amounts under clear sky conditions, were determined for different daily radiation classes and seasons. For high daily radiation classes, the K-values during the middle of the day are in the range 0.7-1.0 in spring and 0. 4-1.0 in autumn, and for low radiation classes, the K-values are in the range 0.4-0.9 in spring and 0.1-0.9 in autumn, which shows that the cloud amounts are less in spring. The average morning and afternoon distributions of the cloudiness factor were al so calculated. In winter the morning and afternoon distributions of the cloudiness factor are nearly the same both at Bangkok and Chiang Mai. In all other seasons cloud amounts in the afternoon hours are higher than those in the morning hours. Solar radiation Thailand Statistical methods Exell, Robert H.B., Chairperson Singh, Gajendra, Examination Committee Chiev, Khus, Examination Committee Government of Belgium, Scholarship Donor Asian Institute of Technology. Thesis ; no. 1255 Full-Text http://203.159.5.9/ait-thesis/detail.php?q=B23431 .b1063485x mnait u 260210 2 951012 m a u 0 mnait mnait mnarc 20 40 Barcode : 30050003024535 CREATED : 1994-05-19 RECORD # : i10813299 LPATRON : 0 LCHKIN : - # RENEWALS : 0 # OVERDUE : 0 IUSE3 : 0 TOT CHKOUT : 0 TOT RENEW : 0 Barcode : 30050003024543 CREATED : 1994-05-19 RECORD # : i10813305 LPATRON : 1012502 LCHKIN : 2000-04-03 # RENEWALS : 0 # OVERDUE : 0 IUSE3 : 0 TOT CHKOUT : 1 TOT RENEW : 0 Barcode : 30050160086996 CREATED : 2016-11-05 RECORD # : i12976040 LPATRON : 0 LCHKIN : - # RENEWALS : 0 # OVERDUE : 0 IUSE3 : 0 TOT CHKOUT : 0 TOT RENEW : 0 111785 111785 0 0 0 0 MAIN MAIN mnait 2026-08-18 0 AIT Thesis no. 1255 30050003024535 2026-08-18 22:23:10 1 2026-08-18 20 0 0 0 0 MAIN MAIN mnait 2026-08-18 0 AIT Thesis no. 1255 30050003024543 2026-08-18 22:23:10 2 2026-08-18 20 0 0 0 0 MAIN MAIN mnarc 2026-08-18 0 AIT Thesis no. 1255 30050160086996 2026-08-18 22:23:10 2026-08-18 40