# Honeybee energy consumption simulation error with Galapagos

Hello,everyone,

I made a model with variable insulation thickness. I have six variables: east wall insulation thickness, west wall insulation thickness, south wall insulation thickness, north wall insulation thickness, roof insulation thickness and floor insulation thickness.

When the thickness change, annual heating load /㎡and annual cooling load /㎡change.

I would like to use Galapagos optimize the six variables for lowest full life cycle cost.

Full life cycle cost is related to two aspects:cost of insulation material and cost of building operation. I built a function to represent it.

Here are my questions：

Galapagos works fine, but annual heating load and annual cooling load look wrong, they are obvious smaller than the ones without Galapagos.

When I am working with all of the data, I find that when the thickness change, heating load/㎡ and annual cooling load/㎡remain stable, and stable at a lower value.

The same parameter produces different results. For example:when east wall insulation thickness=0.06, west wall insulation thickness=0.06, south wall insulation thickness=0.06, north wall insulation thickness=0.06,roof insulation thickness=0.07, floor insulation thickness=0.11，there are two results:

I can not attach the gh file because I am new users. I’ll appreciate it if you give me a hand.

-Oğuzhan

https://1drv.ms/u/s!AvbnTjmiJbU4hQ2qONbFhA1AzH_q?e=gCZsGx

Can you explain more this, how same parameters can give different results? When I run on my computer, taking same results.

By the way, are you sure connect right inputs to your formula, I mean cooling → b, heating → a ?

-Oğuzhan

Thank you very much for your reply. My formula is related to full life cycle cost. It is a little complex, but I think it should be right.

I’ve been running for 35 generations last time, I find that the optimal solution of every generation looks strange, when the thickness change, heating load/m2 and annual cooling load/m2remain stable. like this,

But I find maybe there’s something wrong here. Each name of EPMaterial is pu. That means I have six pu in this file. I think it might have an impact. But I am not sure.

I am trying now. I will reply as soon as I have a result.

Thanks again for you kind help.

It’s really weird, my simulations looks really reasonable as you can see results below;

Can you try again with my .gh ? I changed some small things.

0423simianqiangtibutong.gh (629.4 KB)

I will try again with your .gh. It looks reasonable. Thank you very much!

I changed every EPMaterial ’s name and was really delighted to find the results look reasonable now. To test this further, I checked with your file, they are the same. Here is some of the results.

I really appreciate your help! And sorry for my careless. I hope there are more opportunities after the exchange of learning with you!

It’s normal, no worries.