vikasforsmile Posted February 13, 2017 Share Posted February 13, 2017 Dear Sir, Normally when we discuss Sun availability then it is normally =Sun set-set rise but i have one data set, in which they are using one constant which is =0.041766 so they using formula "-Sun set-Sunrise/(0.041766)" so i have a question about this constant, why they are using this constant.please help me. Link to comment Share on other sites More sharing options...
André Mermoud Posted February 13, 2017 Share Posted February 13, 2017 0.041667 = 1/24. This constant means one hour in units of days. Link to comment Share on other sites More sharing options...
Soldnerkugel Posted February 14, 2017 Share Posted February 14, 2017 Dear Sir, Normally when we discuss Sun availability then it is normally =Sun set-set rise Not really, as this is missing ECET and BCMT and alread during ECET and BCMT there's some irradiation available, which in fact can only be diffuse beam. Link to comment Share on other sites More sharing options...
vikasforsmile Posted February 14, 2017 Author Share Posted February 14, 2017 Sir, what is the need to consider this constant to calculate sun availability? and what is the difference in b/w with or without constant? in my case the sun availability: without constantly is : sun set:18:56 pm and sun rise: 06:30 am so sun availability = 18:56-06:30 =12:23 hours with constant is (0.041677) : sun set:18:56 pm and sun rise: 06:30 am so sun availability = 18:56-06:30/(0.041677) =12:38 hours so the questions are:why are they using this constant?How to they are calculating sun availability? Link to comment Share on other sites More sharing options...
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