Dear David and the rest, I sent this email more than a week ago but I did not get an answer yet, so I was hoping on a reply. Best regards, Benjamin Stobbe Van: TRNSYS-users [mailto:trnsys-users-bounces@lists.onebuilding.org] Namens Benjamin Stobbe Dear David, Thanks for the answer. I looked into the Fortran file, but i don’t know how to recompile the DLL file. I had another question yeah I want to understand the total model sorry for the many questions. I was looking to usefull gain and it is a bit strange because it looks like you need a minimum PV power to get some energy gain. Because below 990 kj/hr there is no usefull gain and then suddenly above this 990 kj/hr you have 4560 kj/hr. My panel is 4 by 5 but how can you explain this. Another thing in the summer there is no direct sunlight on the panels because it are facades and the sun in Hong Kong is high in the summer. According to the model there is then also no PV power, but there is still diffuse radiance on the panel and this will heat the panel also up so why no PV Power. The last question how is the controller(type 2b) working? I monitored the controller and the pump and the temperatures which go in the controller but until now I cannot find a relation. In the controller and the pump I didn’t change anything compared to the basic model. The pump is type 3b and the controller type 2b. I also already looked in the documentation and I found there you have to look to the difference between the upper and lower limit so I do and compare this with your dead band limits I also did that and what I don’t understand is how this dead band works. I did already multiple tests with no dead band(I understand) but as soon as I try a low or high dead band I cannot find logic in it. I really want to understand it. For example the low dead band is 2 and the higher dead band is 10 like the default settings Then you expect when the difference is getting higher than 10 the control signal should go on but it happens already before it reaches 10 and it would go off when it drops below the 2 but it sometimes already goes off above 2 and that makes no sense to me. Or has this to do with the number of oscillations. I hope to hear from you soon. Thanks in advance. Best regards, Benjamin Stobbe Van: David BRADLEY [mailto:d.bradley@tess-inc.com] Benjamin, On 08/20/2015 07:31, Benjamin Stobbe wrote:
-- ***************************David BRADLEYPrincipalThermal Energy Systems Specialists, LLC22 North Carroll Street - suite 370Madison, WI 53703 USAP:+1.608.274.2577F:+1.608.278.1475d.bradley@tess-inc.com http://www.tess-inc.com http://www.trnsys.com |
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