Clayton Miller's profile - activity

Time-series outputs are the best

David -- thanks for the link - that's super helpful!

Hey Andres -- Yes, that would be helpful! is there a good way to share those files? You are willing to open them up to t

Hey Eric -- If you have EnergyPlus outputs that are related to parametric analysis of a single building -- ie: Baseline

That's really helpful Dan -- happy to see you're still checking the boards :)

Thanks Matt! If you have EnergyPlus outputs that are related to parametric analysis of a single building -- ie: Baseline

Open simulation output example data? I'm planning another launch of a data science course for built environment professi

Have you tried using another method besides excel to create the curve coefficients? I used Python to regress VRV coefficients: http://bim-source.com/2012/06/creatin...

Do you want to create performance curves from measured data you have collected?

Please add links to the tools so that people can easily investigate your suggestions

I have a set of EnergyPlus IDF files that I received from a third party and I'd simply like to extract the window to wall ratio (WWR) from the geometry-related objects in the models. Ideally, I'd like to do this without simulating all of them.

Anyone have a workflows, open studio scripts, or other methods to extract the WWR metric?

This should be a comment to the question and not an answer

@Monika Sharma - can you choose an answer to the question based on the choices so far?

Can you add a link to this source?

I let eQuest auto-size the chillers for a project I am working on, and it comes out that the report "PS-D Circulation Loop Loads" shows a peak of 4,964 kBtu/h and "PV-A Plant Design Parameters" as well as "PS-H Loads and Energy Usage for Chilled Water Loop" shows the chillers sized for 7.314 MBTU/h. It is sizing the chillers for almost 2x the peak load.

On a second run I sized each chiller (2x) for half the peak load, but I still see the same numbers on PV-A and PS-H. What does it mean, a bug that nobody fixed yet?

Can anybody tell me what is going on, or if I am making an interpretation mistake?

I am working on a daylight simulation and currently trying to create a double insulated glass material for Radiance.

software pipeline: IGDB#optics6#window7.2#ecotect2011#grasshopper#radiance#daysim3.1

Could you, please, break down the steps on how to use optics2glazedb in glaze script

*have already found the script source.

the glazing system is: 1st layer: 4mm glass pane pvb standard 0.78mm 6mm glass pane#CL skn 174 coating 16mm argon 90% 2nd layer: 4mm glass pane

Quite a general question but perhaps very relevant. You can make it more specific by listing possible types of answers -- ie: studies that have been done showing importance, guidelines which give benefits, etc.

I have modelled 157.5 kWp roof top SPV plant in eQUEST with three electric generators of 52.5 kWp and three inverters of 93% efficiency. Each electric generator of 52.5 kWp is having 210 modules (1 module=250 Wp ) connected in series and parallel combination, i.e. 15 in series and 14 in parallel.

After simulation, In .SIM file, I found that the ratio of inverter output(AC kWh) to inverter input (DC kWh) lies between 60%-75% despite of 93% inverter efficiency.

1. Would you please answer why 25%-40% loss is shown through inverter?
2. Is there any option for battery in eQUEST for SPV plant modelling?

Inverter Specifications:

Capacity per inverter : 50 kVA; Efficiency: 93%; Inverter control : Run when needed; Minimum ratio: 0.02; Maximum ratio: 1.0752

Here are the relevant sections of the inp file here.

Can you find and add a links to the sources mentioned in this answer?

Great answer. Can you put more links in there for the sources you mention?

There are three primary sources for energy modeling schedules I am aware of:

1. ASHRAE 90.1 User's Manuals (based on 90.1-1989)
2. Commercial Reference Building Models of the National Building Stock (NREL/TP-5500-46861)
3. The COMNET Manual.

If you are already familiar with the ASHRAE schedules you should review the the NREL Technical Report publication NREL/TP-5500-46861 "US Department of Energy Commercial Reference Building Models of the National Stock." Their schedules can be found in Appendix B of that publication. You can perform a Google search of the publication number above and go right to the document. Be sure to read the documentation in the report about the schedules. The reports authors started with the 1989 ASHRAE 90.1 User's Manual Schedules and modified them based on their knowledge and experience.

The COMNET Modeling Guidelines & Procedures Manual (MGP) can be downloaded form the following link: http://www.comnet.org/sites/default/f.... You will find the schedules in Appendix C in that publication. These are a great starting point and can always modified as needed for any specific building type or user specific needs. I hope this helps.

Can you run the .eio file comparison as suggested and revise the question based on that?

This text, while very helpful, should likely be a 'comment' to the question as it doesn't directly answer -- it only provides troubleshooting advice which the question asker can use to provide more information...

There is a new, free, open-source tool to navigate, create, and visualize data from various weather files:

http://bigladdersoftware.com/projects...

By "previous year", do you mean the time frame of calibration? Perhaps elaborate this example a bit more too.

Good answer but can you add the url's fo the sites where you can purchase files, etc?

I don't know of any other good sources besides those you mention, however I do have some experience on creation of my own performance curves for VRF systems.

I was in a situation in which I needed VRF performance curves for EnergyPlus and I was given PDF with performance data for a particular unit from a manufacturer.

Essentially I tried to follow the process outlined by this Florida Solar Energy Center document: http://www.fsec.ucf.edu/en/publicatio...

A detailed overview of my process, including code, can be found in this blog post: http://bim-source.com/2012/06/creatin...

To piggy back and Andrew's option 2, OpenStudio has a separate surface type for operable vs. fixed windows. This was done primarily so each window type can take unique default construction, but doesn't otherwise change what happens in EnergyPlus. Both fixed and operable windows are translated as sub-surfaces. I have often thought that an OpenStudo E+ measure that would use the operable tag to create the WindandStackOpenArea objects for you at runtime. This way there is a dynamic link between your geometry and the inputs to the WindandStackOpenArea object.