<br><font size=2 face="sans-serif">Jeff,</font><br><br><font size=2 face="sans-serif">Thank you for answering my question.</font><br><br><font size=2 face="sans-serif">However, I can't seem to find Type 604
in the TESS Hydronics library. Instead, I see that Type 604 is listed among
the individual TESS components. Do you think it would be possible to use
Type 31 or Type 709 (TESS Hydronics) instead, connecting the "environment
losses" output as GAIN in Type 56, or is this a bad idea since I can
not separate conective and radiative gains?</font><br><br><font size=2 face="sans-serif">Kind regards,</font><br><font size=2 face="sans-serif">Knut Erik</font><br><br><br><br><table width=100%><tr valign=top><td width=40%><font size=1 face="sans-serif"><b>"Jeff Thornton"
<thornton@tess-inc.com></b> </font><p><font size=1 face="sans-serif">05/12/2009 07:21 PM</font><table border><tr valign=top><td bgcolor=white><div align=center><font size=1 face="sans-serif">Please respond to<br>thornton@tess-inc.com</font></div></table><br><td width=59%><table width=100%><tr valign=top><td><div align=right><font size=1 face="sans-serif">To</font></div><td><font size=1 face="sans-serif">knut.erik.enerstvedt@niva.no, trnsys-users@engr.wisc.edu</font><tr valign=top><td><div align=right><font size=1 face="sans-serif">cc</font></div><td><tr valign=top><td><div align=right><font size=1 face="sans-serif">Subject</font></div><td><font size=1 face="sans-serif">Re: [TRNSYS-users] Heating pipes model</font></table><br><table><tr valign=top><td><td></table><br></table><br><br><br><font size=2><tt><I need to model heating pipes commonly found in
greenhouses. The pipes<br>are in loops located 15 cm above the floor, 1 m above the floor, along
the<br>walls and somewhat below the ceiling. Hot water flows in the pipes and<br>heats up the greenhouse. I use Type 56 to model the greenhouse, but have<br>not yet succeded in finding a model for the heating pipes. Does anyone<br>know an appropriate model for the heating pipes and how to use it in<br>combination with Type 56? ><br><br>We use the Type 604 model (TESS Hydronics) which accounts for the<br>convective and radiative heat transfer to the zone. Then simply set
up a<br>new "gain" inside of Type 56 and set the radiative and convective
gains as<br>inputs to Type 56. Then make the connections from Type 56 to the
pipe<br>(zone temperature and effective surface temperature) and from the pipe
to<br>Type 56 (radiative heat transfer and convective heat transfer).<br><br>Jeff<br><br><br>Jeff Thornton<br>President - TESS, LLC<br><br>22 North Carroll Street - Suite 370<br>Madison WI 53703 USA<br><br>Phone: 608-274-2577<br>Fax: 608-278-1475<br>E-mail: thornton@tess-inc.com<br>Web: www.tess-inc.com<br><br></tt></font><br>------------------------------------------------------------------------------------------------------------<BR>
Meld deg på vårt nyhetsbrev på www.niva.no<BR>