[TRNSYS-users] radiator type 1231

Sat Aug 5 10:25:22 PDT 2017

Hello,

Is there anyone able to answer my questions below? Many thanks

Best regards,

Yang

2017-08-02 10:53 GMT+01:00 WANG Yang <wanghongyang1767 at gmail.com>:

> Dear all,
>
> I'd like to ask you one question about the error for Radiator Type 1231
> shown in attached picture.
>
> I used its heat transfer rate output to connect Type 56's own-defined
> input as the heating power. Then it appears that error. If I delete
> Radiator Type 1231, it runs well.
>
> Many thanks
>
> Br.
>
> Yang
>
> 2017-08-01 21:12 GMT+01:00 via TRNSYS-users <trnsys-users at lists.
> onebuilding.org>:
>
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>> Today's Topics:
>>
>>    1. Re: variable timestep (Domenico Mazzeo via TRNSYS-users)
>>    2. Re: Exact same control signal for different Type 11f gives
>>       diferent results. (Jeff Thornton via TRNSYS-users)
>>
>>
>> ---------- 已转发邮件 ----------
>> From: Domenico Mazzeo via TRNSYS-users <trnsys-users at lists.
>> onebuilding.org>
>> To: "TRNSYS users mailing list at OneBuilding.org" <trnsys-users at lists.
>> onebuilding.org>, Jeff Thornton <thornton at tess-inc.com>
>> Cc: Jorge Facao <jorge.facao at lneg.pt>
>> Bcc:
>> Date: Tue, 1 Aug 2017 18:09:08 +0200
>> Subject: Re: [TRNSYS-users] variable timestep
>> You could run more simulation with different time steps.
>> Then you could join the results with a variable time step.
>> Regards
>>
>> Il 01 Ago 2017 16:53, "Jeff Thornton via TRNSYS-users" <
>> trnsys-users at lists.onebuilding.org> ha scritto:
>>
>>> No, TRNSYS uses a fixed time step for the duration of the simulation.
>>>
>>> Jeff
>>>
>>> Sent from my iPhone
>>>
>>> > On Jul 31, 2017, at 11:10 AM, Jorge Facao via TRNSYS-users <
>>> trnsys-users at lists.onebuilding.org> wrote:
>>> >
>>> > Hello,
>>> > Is it possible to run a simulation with variable time-step in TRNSYS
>>> 17?
>>> > I have tried to put a time-step as a string in control cards but TRNSYS
>>> > consider the initial value of the string for all simulation.
>>> > Thanks in advance and best regards,
>>> >
>>> > --
>>> > Jorge Facão
>>> >
>>> > Laboratório Nacional de Energia e Geologia (LNEG)
>>> > Laboratório de Energia Solar
>>> > Estrada do Paço do Lumiar, 22
>>> > 1649-038 Lisboa - Portugal
>>> > T: +351-210924600/1; Ext: 4379
>>> > skype: jfacao
>>> >
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>> ---------- 已转发邮件 ----------
>> From: Jeff Thornton via TRNSYS-users <trnsys-users at lists.onebuilding.org>
>> To: trnsys-users at lists.onebuilding.org
>> Cc:
>> Bcc:
>> Date: Tue, 01 Aug 2017 14:57:14 -0500
>> Subject: Re: [TRNSYS-users] Exact same control signal for different Type
>> 11f gives diferent results.
>>
>> Javier,
>>
>> That sounds suspiciously like a convergence problem.  Have you checked
>> the list file to see if you are running into convergence issues?  Have you
>> tried to TRACE the models in question to see what's happening on an
>> iteration by iteration basis?  If it's convergence problems then the
>> questions become: are you using a small timestep?  Are you using a
>> controller with hysteresis? etc.
>>
>>
>>
>> Jeff
>>
>>
>>
>> ---
>> Jeff Thornton
>> President - TESS LLC
>> 22 N. Carroll Street, Madison WI USA 53703
>> Office: (608) 274-2577  Fax: (608) 278-1475www.tess-inc.com
>> E-Mail: thornton at tess-inc.com
>>
>> On 08/01/2017 7:56 am, Javier Vega via TRNSYS-users wrote:
>>
>> Hello TRNSYS users,
>>
>> I want to use two Type 11f (controller flow diverter) components with the
>> same control signal. One Type 11f redirects solar collector flow
>> (Type 553), while the other redirects another circuit's flow to one an
>> Air-Source Heat Pump or a Water Source Heat Pump  (Type 941 or Type 927).
>> The  events are supposed to happen at the same time.
>>
>> Monitoring the results, my DHW temperature falls. When I looked it up,
>> the flow diverters aren't working at the same time. And what it's worse,
>> something happens with the Heat Pumps: I studied the control signals, and
>> they are activated at the same time, but the heat pump's circuit redirects
>> the flow when it isn't supposed to happen and also the Heat Pump that by
>> mistakes recieves flow doesn't heat the water flow. This is what bothers me
>> the most because I set the Heating control signal to a constant 1, so
>> everytime the HP recieves flow it heats.
>>
>> I simply don't know how to address this issue, same control signals
>> giving different results, and a Heat Pump that recieves flow by mistake but
>> doesn't heat. I would appreciate some help.
>>
>> Kind Regards,
>> Javier Vega
>> Universidad de Concepcion
>>
>> 2017-07-28 15:29 GMT-04:00 Javier Vega <jvega025 at gmail.com>:
>>
>>> Hello TRNSYS users,
>>>
>>> I want to use two Type 11f (controller flow diverter) components with
>>> the same control signal. One Type 11f redirects solar collector flow
>>> (Type 553), while the other redirects another circuit's flow to one an
>>> Air-Source Heat Pump or a Water Source Heat Pump  (Type 941 or Type 927).
>>> The  events are supposed to happen at the same time.
>>>
>>> Monitoring the results, my DHW temperature falls. When I looked it up,
>>> the flow diverters aren't working at the same time. And what it's worse,
>>> something happens with the Heat Pumps: I studied the control signals, and
>>> they are activated at the same time, but the heat pump's circuit redirects
>>> the flow when it isn't supposed to happen and also the Heat Pump that by
>>> mistakes recieves flow doesn't heat the water flow. This is what bothers me
>>> the most because I set the Heating control signal to a constant 1, so
>>> everytime the HP recieves flow it heats.
>>>
>>> I simply don't know how to address this issue, same control signals
>>> giving different results, and a Heat Pump that recieves flow by mistake but
>>> doesn't heat. I would appreciate some help.
>>>
>>> Kind Regards,
>>> Javier Vega
>>> Universidad de Concepcion
>>>
>>
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