<html xmlns:v="urn:schemas-microsoft-com:vml" xmlns:o="urn:schemas-microsoft-com:office:office" xmlns:w="urn:schemas-microsoft-com:office:word" xmlns:m="http://schemas.microsoft.com/office/2004/12/omml" xmlns="http://www.w3.org/TR/REC-html40"> <head> <meta http-equiv=Content-Type content="text/html; charset=us-ascii"> <meta name=Generator content="Microsoft Word 12 (filtered medium)"> <title>RE: [esp-r] Control and output of hvac</title> <style>  </style>  </head> <body lang=DE-CH link=blue vlink=purple> <div class=Section1> Dear Michael<o:p></o:p> <o:p> </o:p> what you write sounds very interesting. However, one aspect I do not understand. Why do you need below-time-step information, if what you are interested in is a controller that simulates “human adjustment”. For good simulation results – especially with a plant included – you will probably need at least 10 time steps per hour (6 min intervals) and can easily go below this ...<o:p></o:p> <o:p> </o:p> Best regards<o:p></o:p> Achim<o:p></o:p> <o:p> </o:p> <div> <div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0cm 0cm 0cm'> From: esp-r-bounces@lists.strath.ac.uk [mailto:esp-r-bounces@lists.strath.ac.uk] On Behalf Of Michael Dan B. Usman Sent: Mittwoch, 14. Oktober 2009 19:25 To: Jon Hand; esp-r@lists.strath.ac.uk Subject: [esp-r] Re: Control and output of hvac<o:p></o:p> </div> </div> <o:p> </o:p> thanks a lot! i will be looking into what i want. just as what you have raised, i am still unsure of which to control (ideal zone or plant component). i am aware of the result that i want though, to have a feedback system between the zone temperature and the controller. and having such a system, i would like to see how they both interact per iteration before going on to the next time step. a graphical output of the overshoot and how fast the controller settles to the setpoint. the controller i have in mind so far is a self-adjusting PID, that simulates how a human being would adjust the temperature manually. please pardon my lack of knowledge in terms of the HVAC system as i am an electrical engineer. all i get to think about is adjusting the temperature. as i have read in numerous papers, books, from the basic simulations, and exemplars, i may need to pinpoint certain components in the HVAC to have a more robust control system. hope to hear from the list again because surely i will be having a lot more questions. thanks! -----Original Message----- From: Jon Hand [<a href="mailto:jon@esru.strath.ac.uk">mailto:jon@esru.strath.ac.uk</a>] Sent: Wed 10/14/2009 6:53 PM To: Michael Dan B. Usman; esp-r@lists.strath.ac.uk Subject: RE: [esp-r]  Control and output of hvac It is possible to take advantage of the open source nature of ESP-r and add in your own controller into the source code and of course, once you are satisfied with the new functions you can share your improvements with others in the ESP-r community. You did not specify whether you wanted to impose a new kind of control for a detailed component in a plant network or whether you wanted to introduce a new ideal zone control.  Either option can be implemented within the source code AND you will need to do some background research in order to make the source code changes. First, go to the ESRU web site and the download page for ESP-r and locate the developers guide.  This provides a number of hints for working with the source code of ESP-r.  You will want to check out the ESP-r source development_barnch using Subversion (the current repository is:  <a href="https://espr.svn.cvsdude.com/esp-r/branches/develoment_branch">https://espr.svn.cvsdude.com/esp-r/branches/develoment_branch</a>) While you are on the web site get a copy of the current ESP-r cookbook and review it.  There are also many exemplar models which can be run and you can then use the results analysis module to look at graphs or tables etc. of performance from these models. You second task is to carefully describe in as much detail as possible  (in a form that can be emailed) the control which you would like to implement.  What does it sense, what does it act on, what logic is releated to the control.  Tell us more about the iteration that you think is required. Send that out to the list to see if others might have an intereste in working with you or have advise to offer. It might be possible to make limited changes in an existing controller to do what you want.  Spend some time looking at the existing controls in the exemplars as well as the description of controls in the Cookbook. -Jon Hand ________________________________________ From: esp-r-bounces@lists.strath.ac.uk [esp-r-bounces@lists.strath.ac.uk] On Behalf Of Michael Dan B. Usman [mdbusman@wesm.ph] Sent: 12 October 2009 04:52 To: esp-r@lists.strath.ac.uk Subject: [esp-r]  Control and output of hvac Hello, Just want to ask a few questions... 1. Can I control the hvac using a controller I design so I can do iterations? 2. How do I call the simulator and access the data? 3. How do I interface with the simulator if I were to design my own controller? 4. How can I access results for each iteration per time step (Temp of zone, flux of zone, ambient temp, solar radiation, etc.) Thanks! <o:p></o:p> </div> </body> </html>