The world that emerges after exhausting simulation software

The world that emerges after exhausting simulation software
I have been in the field of architectural design for 16 years now, and during that time I have worked on many projects.
I have been doing simulations using software related to the thermal environment.
I had to do this multiple times for each property, so I think it was quite a number of times.
I tried using some free downloadable software, but
There are many programs that I stopped using because they were not useful. I don't even remember the name of those programs.
I don't remember.
Other than "Building Fuel Consumption Navigator", other well-known software that I have used include
・QPEX
・Solar Designer
・SMASH
・National energy conservation web simulation site
is a typical example.
Especially until fuel economy navigation was available.
I have really used these two programs many times.
I mainly use the "Building Fuel Consumption Navi" now, but if I continue to use this kind of software,
I would like to write about what is going to happen.
First, the general Q value calculation. If you do it many times, the Q value will be about +-0.1 before you even calculate it.
You will be able to imagine it.
For heating load, it is about 35 to 40 kWh/m2/year, so if it is in 5 kW units,
It's starting to get almost right.
The other day, before showing me the results of his own calculations,
"How much do you think it costs?" he asked, putting it on the scale.
At first, the numbers were inconsistent, like "I think it's about this much."
When I got to the bottom of it, I realized that due to a simple mistake, the numbers were almost exactly the same as what I had said.
Normally it would take about two hours to find the answer, but as you get used to it,
These feelings become second nature to you.
To be honest, if you have this level of intuition, you don't need to do a simulation every time.
I think it's okay to say it. If it is necessary, it would be when you are asked to submit it for a subsidy or when you send it to a client.
It might be said that it is only used when necessary to explain something.
If you can allocate the budget to the most cost-effective items each time within a limited budget, you can run a simulation.
Whether you do it or not is unlikely to change the outcome.
However, to get to this point, a considerable number of simulations were conducted and
If you haven't reached this level yet, you should still do a simulation.
There is a need.
The other day, at a social gathering after a lecture, the president of a construction company asked me a question.
We use a certain type of insulation material and use this heating method. I think it's quite advanced, what do you think?
It was that kind of feeling.
there
"What is the Q value and what is the C value?"
I just heard
"I don't know. I haven't done the calculations," he said.
This person is still on the enthusiastic side, but the majority of construction companies in the world are still at this level.
After asking more questions, I somehow got the idea that they had met the bare minimum standards, except for the roof.
However, this person
"Do we really have to calculate that much even when it comes to the thermal environment?" he asked.
So I
"So, you are going to gather the necessary craftsmen to build a seven-story reinforced concrete building.
Let's say you are free to design and construct the building as you wish. If the building is "safe,"
Would you feel confident about living there? And do you think it is actually safe? If so, I'm scared.
The basic span and amount of rebar were not met, and unnecessary equipment was installed in the vibration damper building.
As a result, earthquake resistance is insufficient.
Don't you think the price will be significantly higher than expected?
There may be cases where the strength is achieved by chance, but it is still purely a fluke.
The moment I said that, he clearly understood something that he had not understood until then.
As I was explaining, I also thought to myself, "This is how I'll explain it from now on!"
In this case, if the president had worked at a structural calculation firm for even a year,
You can get a rough idea of the cross-sectional dimensions and amount of rebar without running a simulation.
If that were the case, I can confidently say that I would feel comfortable living in that building, even without having done the calculations.
However, it is unlikely that someone who is not an experienced (expert) person in that field would be able to do it successfully by relying on intuition.
There isn't.
Thermal environment is a matter of physics and engineering, as evidenced by the term "thermal environmental engineering."
There are many uncertainties, so things will not go exactly as planned, but
When you do the calculations you will get results that are roughly similar to that.
Unfortunately, 99% of homes do not have individual heat calculations.
Or they are designed by people who have no sense of heat.
It is amazing how the house is cold in the winter and hot in the summer.
The results show that "if you do it haphazardly, you will hardly get any results!"
Can you make a dish for the first time without a recipe?
I think it's similar to that,
Once you become a top chef, you no longer need recipes.
I would like this article to be read by many people, including the general public.
I would encourage practitioners to read this book as well.
Anyway, I'm going to France for a week starting tomorrow.
I hope I can convey this to you.