<p style="MARGIN: 0cm 0cm 0pt" class="MsoNormal"><font size="3"><font face="Times New Roman"><span style="mso-ansi-language: EN-US" lang="EN-US">Dears</span> Srs.,</font></font></p>
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<p style="MARGIN: 0cm 0cm 0pt" class="MsoNormal"><span style="mso-ansi-language: EN-US" lang="EN-US"><font size="3"><font face="Times New Roman">I am simulation a service building with cooling loads, about 4000W/m2 with a schedule 100% activates in all hours. My system is an air handling unit with return and free cooling. The air handling unit has a cooling coil, a heating coil and a direct evaporation cooling coil 100% activated. The system has humidification and the minimum room relative humidity is 30%.<span style="mso-spacerun: yes"> </span>The temperatures of insufflation are 14-20 ēC for cooling and 20-31 for heating. The room set point is 18-27 ēC. </font></font></span></p>
<p style="MARGIN: 0cm 0cm 0pt" class="MsoNormal"><span style="mso-ansi-language: EN-US" lang="EN-US"><font size="3"><font face="Times New Roman">When I run the simulation, in winter the cooling consumption is 0 because the operation of free cooling. On the other hand, in Winter I have consumption of humidification to control the humidity to 30 %. However the direct evaporative cooling coil does not work as I expected because the direct evaporative cooling coil should help in humidification of the rooms. My question is: Why the direct evaporative cooling coil does not work in winter, when I have height consumption of humidification. In practice the direct evaporative coil work all the year. </font></font></span></p>
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<p style="MARGIN: 0cm 0cm 0pt" class="MsoNormal"><span style="mso-ansi-language: EN-US" lang="EN-US"><font size="3"><font face="Times New Roman">The Best Regards, </font></font></span></p>
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<p style="MARGIN: 0cm 0cm 0pt" class="MsoNormal"><span style="mso-ansi-language: EN-US" lang="EN-US"><font size="3" face="Times New Roman">Ricardo </font></span><span style="mso-ansi-language: EN" lang="EN"></span></p>