Hi all,

I am not an expert on EA but an architect and have troubles to define the population size in jEPlus+EA. As I understood more design variables requires larger population size. But you wrote the choice is also influenced by the number of processor cores you have for running these simulations.

Running the same model for different climate, I found that the total number of "Best solutions" can be very different.

Is there any formula how to calculate the population size? My model has now 14 variables and 3 objectives. I was also wondering how the order of the objectives influences the generation of solutions?

Warm regards,
Susanne

Hi everybody,

I would like to include a simple cost analysis into my parametric model. That means using cost as one of my objectives in the optimizination.
Are there any example files available for jEPlus+EA that include cost effectiveness?

Would be great if you could share your experience with me?

Thanks a lot.

Susanne

Hi JEPLUS team,

I created my first jEPlus-EA project and I am happy how easy it was. CONGRATS! Could job!

However, I was wondering how to get the picture of the model in the preview of the scatterplot.
In the example project I can see it. But in my project it does not appear. http://screencast.com/t/TC3i6e7aY

What I have to do? Maybe I misses out some coding?

Thanks.

Regards,
Susanne

I was wondering if I can somehow collect data from the Energyplus Standard Summary Resports (e.g. Adaptive Comfort Summary) in eplustbl.htm and collect this data in a CSV File using RVI o similar?



I am not a programmer, so, please, if you could explain in detail the solution for this issue. Thanks alot.

Hi,
I am working on a large parametric project in which I have to compare different model and variable at the same time.
I am using JEP+EA.
The objective functions (and the formulas) are:

Electricity; kWh; (c0+c1)/1000/3600
Heating; kWh; c2/1000/3600
Cooling; kWh; c3/1000/3600
Lighting; kWh; c0/1000/3600

Because of the floor area change for each model, to compare the results I need to have values in kwh/m2.

Is there a specific formula?

Thanks
A.

Hi, Dr. Yi,

I tried to use JESS to run my jEplus project, however, the job was rejected and said:

"Tue Feb 03 17:14:43 PST 2015 [JESSUser@Sunshine-PC@2C-D0-5A-7B-2D-D2] RJOB; SN=14772; Status=REJECTED; message=Job is rejected due to Project validation failed: Validation failed
/data/jess/temp/tmp155/14772/D:\Test\/Model_MC.idf does not exist or cannot be read.
Some of model template files are missing. Check file directory.
/data/jess/temp/tmp155/14772/D:\ ()"

The job can be run on my laptop, do you know what causes this problem?



Also, I had problem with EP 7.2, every time when I tried to open a .idf file, it says:
"Run-time error '52': Bad file name or number"


Thank you!

We are running an open demonstration of the new Web UI development for JESS. You are free to try and test it with no strings attached. Just go to ENSIMS' news page to get the access address and the log-in details. This video shows how it works.

[video=youtube]http://youtu.be/Df866zViJwk[/video]

Antonio Malcangi reported that the jEPlus+EA v1.5 would not open a jEPlus project, while it is fine with jEPlus or jEPlus+EA v1.4. After checking the issue I realized that this may be caused by more stringent rules on the project which are enforced by the new version of jEPlus+EA.

If you recall the parameter definitions window (see screenshot below), there is a field name "Value type" which defaults to "Integer". You can normally leave this field alone if you are using a plain list to define values, e.g. {1, 2, 3, 4} or {a, b, c, d}. However, with the new jEPlus+EA, {a, b, c, d} with value type "Integer" is not accepted; therefore the project will not open.

If you run into problems with a project, please first check if this is the issue.

Yi

We have run the jEPlus benchmark set on the test release of EnergyPlus V8.2.6. The performance improvement is quite impressive, as you can see from the chart below. Kudos to the E+ developers!

Matthew Tokarik reported the problem when jEPlus v1.5.1 failed to collection simulation results into csv tables. It turned out that this version of jEPlus does not like spaces in the file paths to the project. For example, if a project is stored in "C:\My Files\Project1\", the RVI result collection step will fail because of the space. It should work correctly if you move the project to "C:\My_Files\Project1\".

This issue affects both jEPlus v1.5.1 and jEPlus+EA v1.5 beta. I will release patches shortly. In the meantime, please avoid any spaces in path names.

Yi