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</o:shapelayout></xml><![endif]--></head><body bgcolor=white lang=PL link=blue vlink=purple><div class=WordSection1><p class=MsoNormal><span style='color:#1F497D'>David,<o:p></o:p></span></p><p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US style='color:#1F497D'>It seems to me that I have made ‘discovery’:<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US style='color:#1F497D'>Infiltration (Ambient -> zone) in Type 97 is given by airchanges per hour, but exfiltration (zone ->Ambient) by kg/h!<o:p></o:p></span></p><p class=MsoNormal><b><u><span lang=EN-US style='color:#1F497D'>Am I right? It is general rule? Or I had to do some settings which determine that…?<o:p></o:p></span></u></b></p><p class=MsoNormal><span lang=EN-US style='color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US style='color:#1F497D'>I thought that exfiltration and infiltration has the same units - it seems that it is the reason why my air balance was wrong.<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US style='color:#1F497D'>Regards,<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='color:#1F497D'>Karol<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US style='color:#1F497D'><o:p> </o:p></span></p><div><div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0cm 0cm 0cm'><p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif";color:windowtext;mso-fareast-language:PL'>From:</span></b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif";color:windowtext;mso-fareast-language:PL'> David BRADLEY [mailto:d.bradley@tess-inc.com] <br><b>Sent:</b> Monday, January 16, 2012 2:54 PM<br><b>To:</b> Karol Bandurski<br><b>Cc:</b> trnsys-users@cae.wisc.edu<br><b>Subject:</b> Re: unit flow TRNSYS/CONTAM<o:p></o:p></span></p></div></div><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Karol,<br> My apologies; I did not see your earlier email.<br><br> Type97's outputs for flow rates into a zone from ambient are in airchanges per hour. The units for the interzonal air flow rate outputs are kg/h. As a side note, the CONTAM help states that interzonal air flow rate outputs are in kg/s but in fact they are in kg/h.<br><br> You are correct about the units of Type3 and Type56 although in Trnsys 17, you are able to select whether you want to provide Type56 airflow inputs in airchanges per hour or in kg/h.<br><br> As I see it, you have two options for seeing the results in m3/h. You can either convert outputs to m3/h using a constant assumed air density of 1.2 kg/m3 in an EQUATION block or you can use Type33 to compute a variable air density. The first option is simpler and probably good enough; Type56 assumes that the air pressure is always 1 atmosphere.<br><br> As for exfiltration and infiltration not matching, I would imagine that they should match if you do not define a mechanical system and just let the building "float." However, if you have a mechanical system that adds outdoor air to the building and you do not also define an exhaust fan then all that additional outdoor air must get out of the building by exfiltration. In the US, a lot of buildings are pressurized a little bit to force exfiltration to be higher than infiltration. The result that you are given by the simulation also depends a bit upon whether you have defined an AHS in CONTAM.<br>Kind regards,<br> David<br><br><br>On 1/16/2012 05:22, Karol Bandurski wrote: <o:p></o:p></p><p class=MsoNormal><span lang=EN-US>Dear Users</span><o:p></o:p></p><p class=MsoNormal><span lang=EN-US> </span><o:p></o:p></p><p class=MsoNormal><span lang=EN-US>Because my problem is very important for me I will ask again to remind my issues.</span><o:p></o:p></p><p class=MsoNormal><span lang=EN-US> </span><o:p></o:p></p><p class=MsoNormal><span lang=EN-US>I use type 56 (TRANBuild), type 97 (CONTAM) and type 3c (fan) to simulate ventilation.</span><o:p></o:p></p><p class=MsoNormal><span lang=EN-US> </span><o:p></o:p></p><p class=MsoListParagraph style='text-indent:-18.0pt;mso-list:l1 level1 lfo2'><![if !supportLists]><b><span style='mso-list:Ignore'>A.<span style='font:7.0pt "Times New Roman"'> </span></span></b><![endif]><b><span lang=EN-US>The problem is that each type have other outputs/inputs units:</span></b><o:p></o:p></p><p class=MsoNormal><span lang=EN-US> </span><o:p></o:p></p><p class=MsoListParagraph style='margin-left:53.4pt;text-indent:-18.0pt;mso-list:l0 level1 lfo4'><![if !supportLists]><span style='mso-list:Ignore'>-<span style='font:7.0pt "Times New Roman"'> </span></span><![endif]><span lang=EN-US>It seems to me that outputs of type 97 are air change rate per hour.</span><o:p></o:p></p><p class=MsoListParagraph style='margin-left:53.4pt;text-indent:-18.0pt;mso-list:l0 level1 lfo4'><![if !supportLists]><span style='mso-list:Ignore'>-<span style='font:7.0pt "Times New Roman"'> </span></span><![endif]><span lang=EN-US>Flow rate in type 3c and 56 is given by kg/hr.</span><o:p></o:p></p><p class=MsoListParagraph style='margin-left:53.4pt;text-indent:-18.0pt;mso-list:l0 level1 lfo4'><![if !supportLists]><span style='mso-list:Ignore'>-<span style='font:7.0pt "Times New Roman"'> </span></span><![endif]><span lang=EN-US>I would like to get results in m3/hr.</span><o:p></o:p></p><p class=MsoNormal><span lang=EN-US> </span><o:p></o:p></p><p class=MsoNormal style='text-indent:18.0pt'><span lang=EN-US>So my questions:</span><o:p></o:p></p><p class=MsoListParagraph style='text-indent:-18.0pt;mso-list:l2 level1 lfo6'><![if !supportLists]><span style='mso-list:Ignore'>1)<span style='font:7.0pt "Times New Roman"'> </span></span><![endif]><span lang=EN-US>Should I do some conversion of units between fan (type 3c) and CONTAM (type 97) or between CONTAM and Type 56?</span><o:p></o:p></p><p class=MsoNormal><span lang=EN-US> </span><o:p></o:p></p><p class=MsoListParagraph style='text-indent:-18.0pt;mso-list:l2 level1 lfo6'><![if !supportLists]><span style='mso-list:Ignore'>2)<span style='font:7.0pt "Times New Roman"'> </span></span><![endif]><span lang=EN-US>How can I get air flow in m3/hr or kg/hr form type 97?</span><o:p></o:p></p><p class=MsoNormal><span lang=EN-US> </span><o:p></o:p></p><p class=MsoListParagraph style='text-indent:-18.0pt;mso-list:l1 level1 lfo2'><![if !supportLists]><b><span style='mso-list:Ignore'>B.<span style='font:7.0pt "Times New Roman"'> </span></span></b><![endif]><b><span lang=EN-US>The second issue is that I calculate year-round infiltration and exfiltration</span></b><span lang=EN-US> for my model (natural ventilation) using type 97 and type 28b (Simulation Summary) and it appear that exfiltration is much larger… How it is possible???</span><o:p></o:p></p><p class=MsoNormal><span lang=EN-US>It seems to me that exfiltration and infiltration air should be equal if there is no other way for air.</span><o:p></o:p></p><p class=MsoNormal><span lang=EN-US> </span><o:p></o:p></p><p class=MsoNormal><span lang=EN-US>Regards,</span><o:p></o:p></p><p class=MsoNormal><span lang=EN-US>Karol </span><o:p></o:p></p><p class=MsoNormal> <o:p></o:p></p><p class=MsoNormal> <o:p></o:p></p><p class=MsoNormal><span lang=EN-US style='mso-fareast-language:PL'>------------------------------------------------</span><o:p></o:p></p><p class=MsoNormal><span lang=EN-US style='mso-fareast-language:PL'>Karol Bandurski MSc.</span><o:p></o:p></p><p class=MsoNormal><span style='background:white;mso-fareast-language:PL'><a href="http://www.ee.put.poznan.pl/" target="_top"><span lang=EN-US style='color:windowtext;text-decoration:none'>Institute of Environmental Engineering</span></a></span><o:p></o:p></p><p class=MsoNormal><span lang=EN-US style='background:white;mso-fareast-language:PL'>Poznan University of Technology</span><o:p></o:p></p><p class=MsoNormal><span style='background:white;mso-fareast-language:PL'><a href="http://www.ee.put.poznan.pl/"><span lang=EN-US>www.ee.put.poznan.pl</span></a></span><o:p></o:p></p><p class=MsoNormal><span style='background:white;mso-fareast-language:PL'><a href="http://www.put.poznan.pl/">www.put.poznan.pl</a></span><o:p></o:p></p><p class=MsoNormal> <o:p></o:p></p><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Times New Roman","serif";mso-fareast-language:PL'><br><br><o:p></o:p></span></p><pre>-- <o:p></o:p></pre><pre>***************************<o:p></o:p></pre><pre>David BRADLEY<o:p></o:p></pre><pre>Principal<o:p></o:p></pre><pre>Thermal Energy Systems Specialists, LLC<o:p></o:p></pre><pre>22 North Carroll Street - suite 370<o:p></o:p></pre><pre>Madison, WI 53703 USA<o:p></o:p></pre><pre><o:p> </o:p></pre><pre>P:+1.608.274.2577<o:p></o:p></pre><pre>F:+1.608.278.1475<o:p></o:p></pre><pre><a href="mailto:d.bradley@tess-inc.com">d.bradley@tess-inc.com</a><o:p></o:p></pre><pre><o:p> </o:p></pre><pre><a href="http://www.tess-inc.com">http://www.tess-inc.com</a><o:p></o:p></pre><pre><a href="http://www.trnsys.com">http://www.trnsys.com</a><o:p></o:p></pre></div></body></html>