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Dear TRNSYS users , I have imported a 3d model ,from trnsys 3d plug-in for sketchup, into the Simulation Studio. I am using Type56 to generate my building's air temperature ( TAIR ) , and the sensible heating&cooling demand of airnodes ( QHEAT-QCOOL ) . I have created 5 different thermal airnodes and my question is , which type should I use as an output in order to retrieve my results, after simulating, in a .txt file so I can process them and compare them with some theoretical measurements concerning these specific thermal zones. Thank you for your help ! Kind regards, Kostas --Forwarded Message Attachment-- From: d.bradley@tess-inc.com CC: trnsys-users@cae.wisc.edu To: ricardo.palomar@hotmail.com Date: Wed, 6 Jun 2012 14:09:13 -0500 Subject: Re: [TRNSYS-users] Type 1716: ROTARY DESICANT DEHUMIDIFIER Ricardo, Without seeing the input file, its hard to know what the problem might be. If you can please send your project to me (directly, please do not reply to the entire list) then I can have a look. Kind regards, David On 6/6/2012 06:03, Ricardo Palomar Calahorra wrote:
-- *************************** David BRADLEY Principal Thermal Energy Systems Specialists, LLC 22 North Carroll Street - suite 370 Madison, WI 53703 USA P:+1.608.274.2577 F:+1.608.278.1475 d.bradley@tess-inc.com http://www.tess-inc.com http://www.trnsys.com --Forwarded Message Attachment-- From: d.bradley@tess-inc.com CC: trnsys-users@cae.wisc.edu To: mattia.rio@mail.polimi.it Date: Wed, 6 Jun 2012 14:14:47 -0500 Subject: Re: [TRNSYS-users] Shading groups Mattia, I think you will have to be a little creative here. Shading devices in Trnsys3D are assumed to be opaque as you know so I don't think you can define the shading surface in there. You could use Type34, which models simple overhangs and/or wingwalls. That model also assumes an opaque shader but it gives outputs for various shading fractions and view factors. You may be able to use those and the unshaded radiation from your weather component to get an estimate of the radiation that comes through your not-quite-opaque device. Lastly, Type56 allows you to enter a shading factor for any given window. You may be able to treat your shaders in that manner. Unfortunately, there is not a direct way to treat semitransparent shaders unless you would care to modify Type34. Kind regards, David On 6/6/2012 10:11, MATTIA ANDREA RIO wrote: Hi!!! i have a little problem with my imported 3d model from trnsys 3d plug-in for sketchup. -- *************************** David BRADLEY Principal Thermal Energy Systems Specialists, LLC 22 North Carroll Street - suite 370 Madison, WI 53703 USA P:+1.608.274.2577 F:+1.608.278.1475 d.bradley@tess-inc.com http://www.tess-inc.com http://www.trnsys.com --Forwarded Message Attachment-- From: d.bradley@tess-inc.com CC: trnsys-users@cae.wisc.edu To: damien.casetta@gmail.com Date: Wed, 6 Jun 2012 14:27:41 -0500 Subject: Re: [TRNSYS-users] Water-to-water heat pump - Heat rate to load control Damien, In my experience, there are relatively few heat pumps available on the market that can do what you are trying to do. Most heat pumps have a fairly fixed capacity (some have multiple stages) so that they have an easier time maintaining a fixed temperature rise than they do in maintaining a fixed temperature outlet. There is at least one notable exception to this; an air-to-water heat pump that has a variable speed compressor that allows it to modulate and maintain a target outlet temperature. Type927 is a temperature level control device meaning that it is looking for inlet water conditions on both sides and for a control signal. If you have obtained your heating loads from some other software tool, I would recommend that you read them into TRNSYS using Type9 and impose them on a water stream using Type682 from the TESS Loads and Structures library. I would then place a thermostat sensing water return temperature in the loop and I would use its output to turn on the loop pump and the Type927 heat pump. You will not get a constant supply temperature of course but in reality, a single stage (or even multi stage) heat pump can't really give you a constant supply temperature; it can only give you a supply temperature that hovers around a set point. If you are using Type56 to generate your building's heating demand, I would take it out of energy rate control (ie turn OFF the automatic heating and cooling types in TRNBuild), and allow the zone temperatures to float. I would then use a thermostat watching the zone air temperature and some kind of delivery device (a fan coil, radiant floors, etc.) to deliver the hot water from the Type927 to the zone. Kind regards, david On 6/6/2012 12:20, Damien Casetta wrote: Hi, -- *************************** David BRADLEY Principal Thermal Energy Systems Specialists, LLC 22 North Carroll Street - suite 370 Madison, WI 53703 USA P:+1.608.274.2577 F:+1.608.278.1475 d.bradley@tess-inc.com http://www.tess-inc.com http://www.trnsys.com |