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    <p>Tomas,</p>
    <p>  Make sure that you activate the internal device in the zone
      window as well as defining the specifics of the internal device in
      the window type manager.</p>
    <p>kind regards,</p>
    <p> David</p>
    <p><br>
    </p>
    <div class="moz-cite-prefix">On 12/08/2021 08:56, Tomas Persson
      (HDa) via TRNSYS-users wrote:<br>
    </div>
    <blockquote type="cite"
cite="mid:AM7PR07MB67704780FA8ADE9F6FAA9799B26F9@AM7PR07MB6770.eurprd07.prod.outlook.com">
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        <p class="MsoNormal"><span lang="EN-US">Dear TRNSYS user<o:p></o:p></span></p>
        <p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
        <p class="MsoNormal"><span lang="EN-US">I tried to activate the
            internal shading device in the window type manager to
            increase the thermal resistance in a greenhouse model
            (thermal curtain), but I was not able to detect any
            influence on the heat loss.<o:p></o:p></span></p>
        <p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
        <p class="MsoNormal"><span lang="EN-US">Assuming it would work
            it seems it can only be activated by solar radiation and not
            from an input, thus it is not useful anyway to model thermal
            curtains in greenhouses.<o:p></o:p></span></p>
        <p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
        <p class="MsoNormal"><span lang="EN-US">Do you have any
            suggestion how to model a thermal curtain in a greenhouse
            that can be activated independently from the solar radiation
            and reduce both solar radiation and heat losses.<o:p></o:p></span></p>
        <p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
        <p class="MsoNormal"><span
style="font-family:"Arial",sans-serif;mso-fareast-language:EN-GB"
            lang="EN-US">Kind Regards<o:p></o:p></span></p>
        <p class="MsoNormal"><span
style="font-family:"Arial",sans-serif;mso-fareast-language:EN-GB"
            lang="EN-US">Tomas Persson<o:p></o:p></span></p>
        <p class="MsoNormal"><span
style="font-family:"Arial",sans-serif;mso-fareast-language:EN-GB"
            lang="EN-US"><o:p> </o:p></span></p>
        <p class="MsoNormal"><b><span
style="font-family:"Arial",sans-serif;color:#1F497D;mso-fareast-language:EN-GB">Högskolan
              Dalarna /Dalarna University<o:p></o:p></span></b></p>
        <p class="MsoNormal"><span
style="font-family:"Arial",sans-serif;color:black;background:white">SE-791
            88 Falun | Växel/Switchboard: +46 (0)23-77 80 00 | </span><span
            style="font-family:"Arial",sans-serif"><a
              href="https://www.du.se/" moz-do-not-send="true"><span
                style="color:#0563C1">www.du.se</span></a><o:p></o:p></span></p>
        <p class="MsoNormal" style="text-autospace:none"><span
style="font-family:"Arial",sans-serif;color:black;mso-fareast-language:EN-GB">Avdelningen
            för energi och byggteknik, (Dept. of Energy and Construction
          </span><span
            style="font-family:"Arial",sans-serif;color:black">Engineering
            ITE</span><span
style="font-family:"Arial",sans-serif;color:black;mso-fareast-language:EN-GB">)<o:p></o:p></span></p>
        <p class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;background:white"><span
style="font-size:10.0pt;font-family:"Arial",sans-serif;color:black"
            lang="EN-US">When you send an e-mail to Dalarna University,
            we will process your personal data.<br>
          </span><span
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href="https://www.du.se/en/about-du/this-is-dalarna-university/organisation-and-management/office-of-the-vice-chancellor/personal-data-protection/"
              moz-do-not-send="true"><span style="color:#0563C1"
                lang="EN-US">Learn more about how we process personal
                data.</span></a></span><span
style="font-size:10.0pt;font-family:"Arial",sans-serif;color:black"
            lang="EN-US"><o:p></o:p></span></p>
        <p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
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      <pre class="moz-quote-pre" wrap="">_______________________________________________
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</pre>
    </blockquote>
    <pre class="moz-signature" cols="72">-- 
***************************
David BRADLEY
Principal
Thermal Energy System Specialists, LLC
3 North Pinckney Street - suite 202
Madison, WI  53703 USA

P:+1.608.274.2577
<a class="moz-txt-link-abbreviated" href="mailto:d.bradley@tess-inc.com">d.bradley@tess-inc.com</a>

<a class="moz-txt-link-freetext" href="http://www.tess-inc.com">http://www.tess-inc.com</a>
<a class="moz-txt-link-freetext" href="http://www.trnsys.com">http://www.trnsys.com</a></pre>
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