[TRNSYS-users] Advice on TRNSYS application

Hasan Baig mail2baig at gmail.com
Wed Aug 28 01:04:45 PDT 2013


Hi Mick,

You are certainly right in pointing out this problem while developing your
own components. Developing the EES program sounds much simpler, however I
believe there are options in trnsys which allow you to connect to the ees
program this way you would be able to utilise the already developed
programs in ees and connect them with trnsys.

regards

Hasan


On Wed, Aug 28, 2013 at 4:06 AM, Michael Calcoen <
Michael.Calcoen at minus40.com.au> wrote:

>  Dear TRNSYS-users,****
>
> ** **
>
> Our company has been looking into the obtaining the TRNSYS software for
> quite a while now and hence I would like to get a view of people working
> with the software on a regular basis. I have tried the demo software
> extensively as well.****
>
> ** **
>
> To give a bit of background: We are an engineering company in industrial
> refrigeration and process cooling. Over the years, we have relied
> extensively on EES and internally developed load simulation tools for our
> system modelling and simulation requirements. For the various system
> components and control logics we want to model, we have developed our own
> governing equations and curve-fits which can be altered to suit each
> system. Although suitable for many projects, EES is only able to solve
> ‘quasi steady state’ models. Hence, we can do annual simulations to predict
> a system’s annual energy consumption, but we can’t simulate transient
> behaviour required to model for example thermal storage.****
>
> ** **
>
> At the moment, we think there are two drivers to move to TRNSYS. Firstly,
> we would be able to model systems where it is required to simulate
> transient behaviour. Secondly, as TRNSYS has a modular structure, we feel
> there may be a reduction in time required to develop models. Since EES is
> fully equation-based, the mathematical equation-equivalent of complex and
> large systems can become quite extensive and tedious to develop. It seems
> TRNSYS would more readily enable the re-use of sub-models in various
> projects and therefore reduce time to develop and check models.****
>
> ** **
>
> The biggest question mark around TRNSYS is this: By researching the
> possibilities and available components, I am now 100% convinced we will
> need to develop our own component models for many of our system components
> and control systems. In essence, I don’t see this as a problem. However,
> after reading through the several manuals, working with the demo and
> reading the various threads on this mailing list, it seems we can expect a
> lot of trouble/problems when developing components. As one example, there
> seems to be no clear guidance on which Fortran compiler to use. Many people
> recommend an old compiler (Compaq Visual Fortran) which is no longer
> available. There seems to be no information which details how to develop
> new components with for example the latest Intel Visual Fortran Composer XE
> 2013. Besides that, I can see many people struggling on these threads with
> errors that are seemingly impossible to correct of solve. Are these merely
> problems related to the Fortran programming itself? I may be wrong, but
> there seems to be not much technical support for people who are required to
> develop their own components.****
>
> ** **
>
> As you can see, we are struggling with the above issues. I would be
> delighted if people could share their thoughts on this and offer some
> advice.****
>
> ** **
>
> Kind regards, ****
>
> ** **
>
> Mick Calcoen*
> *Lead Consultant****
>
> ** **
>
> MINUS40 Engineers - Designers, Consultants and Project Managers****
>
> T| +61 2 8850 4811 ****
>
> F| +61 2 8850 4866****
>
> M|+61 410 595 291****
>
> Office address: Unit 7, 22 Hudson Avenue, Castle Hill, NSW 2154, Australia
> ****
>
> Web: http://www.minus40.com.au****
>
> [image: Description: Description: Description: Description: minus40 logo]<http://www.minus40.com.au/>
> ****
>
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> ** **
>
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