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<p>Ciarán,</p>
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<p>I was not able to recreate horizontal extraterrestrial warning in version 16.1 or the current 17.1. If you could please send me your *.tpf and listing (*.lst) file, I will try to provide some insight.</p>
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<p>Thank you,</p>
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<p>Matt Duffy</p>
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<p>On 2013-02-07 11:42, Flynn Ciaran wrote:</p>
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<p class="MsoNormal">Hello everyone,<!-- o ignored --></p>
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<p class="MsoNormal">I have a question concerning the validity of the solar data in the FI-Helsinki-Airport-29740.tm2 weather file.<!-- o ignored --></p>
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<p class="MsoNormal">After running my simulation with a typical year of Helsinki weather, I got the following errors concerning solar data: <!-- o ignored --></p>
<p class="MsoNormal"><em>“The calculated total horizontal radiation exceeded the horizontal extraterrestrial radiation and was set to the extraterrestrial for 1212 timesteps during the simulation”<!-- o ignored --></em></p>
<p class="MsoNormal"><em>“The calculated horizontal beam radiation exceeded the provided total horizontal radiation and was set to the total horizontal radiation for 4 timesteps during the simulation”<!-- o ignored --></em></p>
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<p class="MsoNormal">To get the typical solar data for Helsinki, I modified the global horizontal, direct normal and diffuse horizontal solar data in the tm2 file (according to: <em><span style="font-family: 'Arial','sans-serif';">Development of weighting factors for climate variables for selecting the energy reference year according to the EN ISO 15927-4 standard. </span></em><span style="font-family: 'Arial','sans-serif';">Kalamees, T., Jylhä, K., Tietäväinen, H., Jokisalo, J., Ilomets, S., Hyvönen, R. and Saku, S.</span><span style="font-family: 'Arial','sans-serif';"> Vols. </span><span style="font-family: 'Arial','sans-serif';">Energy and Buildings 47 (2012) 53–60.</span>), leaving the extraterrestrial data untouched.<!-- o ignored --></p>
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<p class="MsoNormal">I found out that one reason behind the errors was that the extraterrestrial solar data do not seem to be valid. For example, in the tm2 file, there are only 5 hours of extraterrestrial solar data for the shortest days of the year. In reality however, the minimum daylight hours is just under 6 hours…<!-- o ignored --></p>
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<p class="MsoNormal">So my question is, does anyone know of a valid method to circumvent this inconsistent extraterrestrial data problem? Can I simply set all of the extraterrestrial radiation values to a high number throughout the year (and how useful are these if non-extraterrestrial radiation data are already provided)?<!-- o ignored --></p>
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<p class="MsoNormal">Thank you for your help,<!-- o ignored --></p>
<p class="MsoNormal">Ciarán<!-- o ignored --></p>
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<p class="MsoNormal"><em><span style="font-size: 10.0pt; font-family: 'Arial','sans-serif'; color: black;">----------------------------------------<!-- o ignored --></span></em></p>
<p class="MsoNormal"><em><span style="font-size: 10.0pt; font-family: 'Arial','sans-serif'; color: black;">Ciarán Flynn<!-- o ignored --></span></em></p>
<p class="MsoNormal"><em><span style="font-size: 10.0pt; font-family: 'Arial','sans-serif'; color: black;">Project Researcher<!-- o ignored --></span></em></p>
<p class="MsoNormal" style="margin-top: 6.0pt;"><em><span style="font-size: 10.0pt; font-family: 'Arial','sans-serif'; color: black;">Aalto University - Department of Energy Technology<!-- o ignored --></span></em></p>
<p class="MsoNormal"><em><span style="font-size: 10.0pt; font-family: 'Arial','sans-serif'; color: black;">P.O.Box 14100, 00076 Aalto<!-- o ignored --></span></em></p>
<p class="MsoNormal"><em><span style="font-size: 10.0pt; font-family: 'Arial','sans-serif'; color: black;">Otakaari 4, 02150 ESPOO<!-- o ignored --></span></em></p>
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