Dynamic Thermal Simulation

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Dynamic Thermal Simulation

Postby Mss » Wed Jul 17, 2013 10:52 pm

Hi,

I'm wondering if somebody has ever carried out a dynamic thermal simulation (or Building Energy Modeling, don't know which term is the most appropriate in Oz) for the building or renovation of houses?

which software are used in Australia ?

Given the warm temperatures, assess comfort during the summer months and thermal inertia could be very helpful.
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Re: Dynamic Thermal Simulation

Postby Tracker » Wed Aug 07, 2013 10:49 am

.
there clearly are programs that take into account ALL building materials, and orientation, and others will tell you a program name, but they wont be FreeWare...

I'm a seat-of-the-pants builder, and suspect that I could do anything as good as some License-Paidup dude claiming to be able to reduce MY Carbon FootPrint

I think that we have reached a time of "Big-Brother" intrusion, where home approvals need such assessments, and justifications of WHY things are done..
Obviously, some would say this is all good for the environment, but I do wonder if the embedded energy cost of all the fancies, makes it all worthwhile and practical.. :idea:
..
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Re: Dynamic Thermal Simulation

Postby davidg » Wed Aug 07, 2013 12:45 pm

Tracker wrote:There clearly are programs that take into account ALL building materials, and orientation, and others will tell you a program name, but they wont be FreeWare...

One of the best known is "first rate" not free as you say, normally only used for new houses but nothing stops it being used for reno's and the like as well, however most programs do not take into account, the handy dandy perons that is inventive and think outside of the box, it's all done on conventional lines.

Tracker wrote:I'm a seat-of-the-pants builder, and suspect that I could do anything as good as some License-Paidup dude claiming to be able to reduce MY Carbon FootPrint

:D , I like to some things almost seat of the pants, but I also like to do calculations mainly for structural and wind action just to make sure I have not under designed something to date I never have but it's nice to know. I used to go on very steep learning curves figuring out how to use formulas for "stuff" , nothing like trial and error with formulas, then figure out if you got the calculation right.

Tracker wrote:I think that we have reached a time of "Big-Brother" intrusion, where home approvals need such assessments, and justifications of WHY things are done..

I have no issue with such assessments but I can tell you for sure they do not take into account a lot of things when doing an off-grid house, that just completely messes with the software, it cannot take it into account at all, or certainly not to date, that we found with our house. We got 6.5 star rating but it assumes things that will just not be in the house and it's kind of hard to take them out, if you did then the rating would have been more like 8 or 9 star. Damn frustrating, oh well don't care anymore got the permit now.

One such example it will not take into account alternative sources of heating apart from wood for instance, Ground source heating and cooling First Rate just does not cope with at all. Large amount of off-grid solar no, wind turbines no, renewable powered extra cooling systems no, large green living walls no, and so on ................. So some stuff will just not be rated ours cetainly wasn't, then we fudged other things so the rating came out nicely again because the software just can't do things outside of the box.
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Re: Dynamic Thermal Simulation

Postby Benny » Thu Aug 08, 2013 6:09 pm

Hot3000 is free but not all that easy to use. I've only just started playing around with it.
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Re: Dynamic Thermal Simulation

Postby philio » Fri Nov 22, 2013 5:48 pm

Hot2000 is free .. although its made for Canada.. im not sure if weather can be adjusted for Aus

Hot3000 is free.. never used it .. but if its as simple as Hot2000 you should be able to use it quite easily. just read up on the limitations and undstand that it takes some interpretation.

I believe they are fairly weak programs, but good in simple analysis.

If you want something a bit more elaborate. Try eQuest... free and this is more appropriate for larger buildings.
Even more advanced would be EnergyPlus. Also free - havenot used yet.

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