{"title":"苏丹日长与地外辐射:比较研究","authors":"N. Elagib, S. Alvi, M. Mansell","doi":"10.1080/01425919908914348","DOIUrl":null,"url":null,"abstract":"A comparative study of estimating the day-length, S 0, and extraterrestrial radiation, H, is conducted, with special reference to Sudan. Due to the definitions of the formulae of Cooper and Hay, differences in S 0-values are normal; however, the former formula revealed excellent agreement with data on the duration between sunrise and sunset. Hence, the paper recommends adopting Cooper's method for computing S 0 for Sudan. With regard to H 0, the use of the average days for the months, as recommended by Klein, has depicted no substantial errors. This has also been found true for day-length computations. The study further accentuates that the amount of solar energy available in Sudan is significantly large to be used for industrial purposes.","PeriodicalId":162029,"journal":{"name":"International Journal of Solar Energy","volume":"124 19","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"1999-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"17","resultStr":"{\"title\":\"DAY-LENGTH AND EXTRATERRESTRIAL RADIATION FOR SUDAN: A COMPARATIVE STUDY\",\"authors\":\"N. Elagib, S. Alvi, M. Mansell\",\"doi\":\"10.1080/01425919908914348\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"A comparative study of estimating the day-length, S 0, and extraterrestrial radiation, H, is conducted, with special reference to Sudan. Due to the definitions of the formulae of Cooper and Hay, differences in S 0-values are normal; however, the former formula revealed excellent agreement with data on the duration between sunrise and sunset. Hence, the paper recommends adopting Cooper's method for computing S 0 for Sudan. With regard to H 0, the use of the average days for the months, as recommended by Klein, has depicted no substantial errors. This has also been found true for day-length computations. The study further accentuates that the amount of solar energy available in Sudan is significantly large to be used for industrial purposes.\",\"PeriodicalId\":162029,\"journal\":{\"name\":\"International Journal of Solar Energy\",\"volume\":\"124 19\",\"pages\":\"0\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"1999-04-01\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"17\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"International Journal of Solar Energy\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/10.1080/01425919908914348\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"International Journal of Solar Energy","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1080/01425919908914348","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
DAY-LENGTH AND EXTRATERRESTRIAL RADIATION FOR SUDAN: A COMPARATIVE STUDY
A comparative study of estimating the day-length, S 0, and extraterrestrial radiation, H, is conducted, with special reference to Sudan. Due to the definitions of the formulae of Cooper and Hay, differences in S 0-values are normal; however, the former formula revealed excellent agreement with data on the duration between sunrise and sunset. Hence, the paper recommends adopting Cooper's method for computing S 0 for Sudan. With regard to H 0, the use of the average days for the months, as recommended by Klein, has depicted no substantial errors. This has also been found true for day-length computations. The study further accentuates that the amount of solar energy available in Sudan is significantly large to be used for industrial purposes.
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