[TRNSYS-users] Changing the role of a standard component
Diego A. Arias
daarias at wisc.edu
Tue Mar 27 07:43:34 PDT 2007
Dear Papia,
Please find attached the same project created with TRNSYS16.00.0038.
Best regards,
Diego
papia sultana wrote:
> Hi Diego,
> Thank u for your help. The attached file u send previously, probably
> with the latest version, so I could not open it. Currently I am using
> TRNSYS 16. Is it possible to send that problem compatible with 16?
>
>
> Best regards
> Papia
>
>
>> From: "Diego A. Arias" <daarias at wisc.edu>
>> To: papia sultana <papia_s at hotmail.com>
>> CC: trnsys-users at engr.wisc.edu
>> Subject: Re: [TRNSYS-users] Changing the role of a standard component
>> Date: Mon, 26 Mar 2007 16:33:48 -0500
>>
>> Hi Papia,
>>
>> I just thought of a way of doing this without a Fortran compiler.
>> You can use a Type22-Feedback controller, to find the right input
>> that minimizes the error between a set point and a measured signal.
>> In this case, your set point is the heat transfer rate that you want
>> (from Type14), and the measured signal is the result from Type91
>> (actual heat transfer rate). The control signal from Type22 can be
>> used to modulate (for our purposes, calculate) the mass flow rate
>> that will yield the heat transfer rate that minimizes the error.
>>
>> I am attaching an example project. The example is very simple. I do
>> not know if in a more complex simulation it may become more difficult
>> to follow this strategy. I will appreciate any comments.
>>
>> Best regards,
>>
>> Diego
>>
>>
>>
>>
>> David Bradley wrote:
>>> Papia,
>>> Type91 calculates the heat transfer rate across the heat exchanger
>>> based on the conditions (temperature and flow rate) at the inlets
>>> and on the effectiveness specified by the user. The place you need
>>> to start is with the 05-Mathematical Description manual to resolve
>>> the equations that Type91 uses so that the heat exchange rate is
>>> known and some other variable (outlet temperature of one side of the
>>> HX for example) is unknown. As Diego and I mentioned in our previous
>>> emails, you would then need a Fortran compiler in order to write a
>>> new component for TRNSYS.
>>> Kind regards,
>>> David
>>>
>>>
>>> At 20:32 3/25/2007, papia sultana wrote:
>>>> Dear Diego,
>>>> Thanx for your interest.
>>>> In my problem, I am using 'type 14 h' to read a variable cooling
>>>> load (let's
>>>> say within 0 to 24 hr). Next, I am linking this to a 'type 91' HE
>>>> through an
>>>> appropriate equation 'equa' (needed to convert the unit). For the
>>>> HE of
>>>> 'type 91', I would like to link the 'cooling load' in terms of 'heat
>>>> transfer rate' in the input list. So that new input list could be:
>>>> heat
>>>> transfer rate, hot side flow rate, cold side inlet temp, cold side
>>>> flow
>>>> rate. The output list may remain same or could cut down one/ two.
>>>> My point
>>>> is, how could I modify the component 'type 91' to cop with variable
>>>> load?
>>>>
>>>> best regards
>>>> Papia
>>>>
>>>>
>>>>
>>>>
>>>> >From: "Diego A. Arias" <daarias at wisc.edu>
>>>> >To: papia sultana <papia_s at hotmail.com>
>>>> >CC: trnsys-users at engr.wisc.edu
>>>> >Subject: Re: [TRNSYS-users] Changing the role of a standard
>>>> component
>>>> >Date: Fri, 23 Mar 2007 09:35:30 -0500
>>>> >
>>>> >Dear Papia,
>>>> >
>>>> >Changing a component is more than changing the proforma. You need to
>>>> >change the mathematical formulation, which is done in a Fortran
>>>> compiler.
>>>> >If you need to modify a standard component, please feel free to
>>>> send me a
>>>> >more detailed description of what you need and I may be able to
>>>> help you.
>>>> >Best regards,
>>>> >
>>>> >Diego
>>>> >
>>>> >
>>>> >papia sultana wrote:
>>>> >>Dear TRNSYS users,
>>>> >>
>>>> >>I have just started to use TRNSYS for centralized cooling system
>>>> and I am
>>>> >>just a novice. I would like to know If I change any of the output
>>>> variable
>>>> >>to an input variable or vice-versa to a component, do I need to
>>>> generate
>>>> >>new component? If not, I am not able to change any of the variable
>>>> >>properties from the Proforma dialogue box even after saving the
>>>> changes?
>>>> >>
>>>> >>btw I will highly appreciate If any body like to share a basic
>>>> central
>>>> >>cooling model with me.
>>>> >>
>>>> >>Best regards
>>>> >>Papia
>>>> >>
>>>> >>
>>>> >
>>>> >
>>>> >--
>>>> >Diego A. Arias
>>>> >TRNSYS Coordinator
>>>> >Solar Energy Laboratory
>>>> >University of Wisconsin - Madison
>>>> >1500 Engineering Drive
>>>> >Madison, WI 53706
>>>>
>>>> _________________________________________________________________
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>>>>
>>>> _______________________________________________
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>>>> TRNSYS-users at engr.wisc.edu
>>>> https://www.cae.wisc.edu/mailman/listinfo/trnsys-users
>>>
>>> ****************************************************************************************
>>>
>>>
>>> Thermal Energy System Specialists (TESS), LLC
>>> David BRADLEY 2916 Marketplace Drive -
>>> Suite 104
>>> Partner Madison, WI 53719
>>> Phone: (608) 274-2577 USA
>>> Fax: (608) 278-1475
>>> E-mail: bradley at tess-inc.com
>>> Web Pages: http://www.tess-inc.com and http://www.trnsys.com
>>>
>>> "Providing software solutions for today's energy engineering projects"
>>> ****************************************************************************************
>>>
>>>
>>>
>>>
>>
>>
>> --
>> Diego A. Arias
>> TRNSYS Coordinator
>> Solar Energy Laboratory
>> University of Wisconsin - Madison
>> 1500 Engineering Drive
>> Madison, WI 53706
>
>
>> << UsingOutputsToCalculateInputs.tpf >>
>
> _________________________________________________________________
> FREE pop-up blocking with the new MSN Toolbar - get it now!
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