mikesweeney's profile - activity

You can try Timestep, which relies on SQLite rather than ESO files. https://michaelsweeney.github.io/timestep/

You can try Timestep, which relies on SQLite files rather than ESO files... https://michaelsweeney.github.io/timestep/

https://michaelsweeney.github.io/timestep/

Shameless plug: Try using Timestep instead of DView: https://michaelsweeney.github.io/timestep/

It looks like you might have some kind of security issue opening timestep.exe. There’s some info on the homepage for how

Totally understandable. The program hasn't been updated in a couple years so it's possible there are some older modules

It looks like you might have some kind of security issue opening timestep.exe. There’s some info on the homepage for how

Running several measures directly within OS SDK scripting environment Is there a documented workflow or example to run s

Also interested in this; has there been any update on manual PAT.json editing? I'm trying to simulate a few hundred perm

are you having an issue importing the raw ESO data into designbuilder? or is the issue being able to format and parse th

Just updated the link. Also included an example for generating csv files in the readme.

I have a Python repository on my GitHub with a few modules for eQuest file parsing. Most of the 'sim_parse' files will r

i'm working on an open-source tool that is installable for mac and PC, which aims to solve exactly this issue. It curren

i'm working on an open-source tool that is installable for mac and PC, which aims to solve exactly this issue. It curren

Here is a Python module I've developed, which abstracts away SQL queries for both tabular and Hourly/Timestep reports, h

Here is a Python module I've developed, which includes support for SQL queries for both tabular and Hourly/Timestep repo

I assume you've installed Python and all dependencies? if so, maybe take a look at the results in Jupyter, or an IDE lik

I have a Python repository on my GitHub with a few modules for eQuest file parsing. Most of the 'sim_parse' files will r

I have a Python repository on my GitHubwith a few modules for eQuest file parsing. Most of the 'sim_parse' files will ru

In my experience DesignBuilder's runtime is very close to EP Launch. -Have you tried exporting the IDF from DesignBuil

Is there any easy way to correlate a system node with the loop to which it belongs?

For example, I'd like to enter "AHU-1 Supply Side Inlet Node" and return "AirLoopHVAC" and "AHU-1 Loop" or something similar.

I've tried Walk_HVAC in Eppy and a few other Eppy functions, as well as looking through the SQL file, but can't seem to get it to find an elegant solution.

Update: I figured out a solution to this in Python using Eppy. It's a little bit hacky in that it relies on a lot of hea

System Node Loop correlation Is there any easy way to correlate a system node with the loop to which it belongs? For e

DOE-2 Command Line Hourly Reports I'm implementing a process using DOE-2 files which are initially built within eQuest a

Sketchup/eQuest polygon coordinate exchange I have a number of very old eQuest models (5+ yrs) that need to be updated f

From the Input-Output Reference: "The window vertices that you specify in the FenestrationSurface:Detailed object are t

i'm not sure about cooling in the floor, but designbuilder 5.2 has a "radiant surface" component you could try. or look

PTACs don't typically specifically have humidity controls, but if you lower the supply air coming off the PTAC it may re

does the floor cooling system have chilled water? if so, you'd need to have a chilled water plant connected to it. if yo

understood. good question and i'm not sure i have the answer; i'd reach out to the DesignBuilder team directly or look t

There should be a sub-folder within the DesignBuilder schedules library called "ASHRAE 90.1-2007." Most of these profile

it sounds like you have a heating setpoint of 20, but either no cooling setpoint or no cooling equipment assigned to you

This has been addressed in detail here: There's just too much going on in the SS-D reports to accurately pull out venti

This has been addressed in detail here: There's just too much going on in the SS-D reports to accurately pull out venti

On second thought, I think the answer is much more complicated than my initial response. I'm editing my first answer now

If you just need the peak values then the "SS-D Building HVAC Load Summary Report" should give you building + outdoor ai

The "SS-D Building HVAC Load Summary Report" should give you building + outdoor air. There will be some other HVAC-relat

I'm experiencing the same issue with a LEED Baseline building model. I have about (5) VAV units, each with roughly 20 zones and as might be imagined, manually entering the requirements for each zone's terminal unit/DesignSpecification:OutdoorAir will be very cumbersome. Has this issue been sufficiently addressed so that there is a way to simply specify the total outdoor air required at each baseline system level?

Coefficients 1 thru 4 for your Pump:VariableSpeed objects are 0, 1, 0, 0, respectively. This may be your issue. I don't know if there is a repository for variable speed pump curves available anywhere, but I'd try running it with a coefficient of 0, 0.5, 0.5, 0, respectively. This ought to approximate the electric output of a variable speed pump well-enough to know if this is the reason for your energy consumption issue.

Edit: In addition, at least with this configuration of your chilled water loop you may need to change the "Chiller Flow Mode" on your chiller to "LeavingSetpointModulated" in order to allow the flow to vary through the chiller.

I'm modeling a low-temperature operating room being served by a constant volume air handler (it's really only constant volume due to hospital ACH requirements). The model is entirely within DesignBuilder v5.0.1

The air handler's SAT setpoint is 43F and in the design there are two chilled water coils in the mixed air stream that are controlled separately and in series to meet this temperature. The first coil is served by a campus chilled water loop and brings the air down to 54F. The second is served by a low-temperature air-cooled chiller which brings the SAT down to the required 43F (after accounting for draw-thru fan heat). The energy purpose for this arrangement is to use the high-efficiency campus plant for as much as possible, and to then only load the relatively poor-performing air-cooled chiller with the remainder but to also avoid excessive unloading on the air-cooled chiller.

I've tried a number of setpoint manager configurations for this arrangement and the closest I've gotten is to place a 54F setpoint manager after the first cooling coil, a 43F setpoint manager after the second cooling coil, and a 43F setpoint manager after the supply fan. This correctly forces the low-temperature chilled water coil to supply 43F air but the campus CHW coil seems to disregard the 54F setpoint manager and just get the air as close to 43F as it possibly can, which results in temperatures substantially lower than 54F when the mixed air temperature is below the coil's design entering air temperature. In turn, this leads to poor part-load performance and excessive unloading at the air-cooled chiller.

I've also considered using a pre-cooling coil but it looks like this only pre-cools the outdoor air and not the mixed air stream. This is an option but it would be difficult to control the amount of cooling of the outdoor air that would be required in order to bring the mixed air temperature to the 54F setpoint due to variations in the return air temperature at different points in the day. One idea for this approach might be to write an EMS script changing the pre-cooling setpoint to some function of the delta T between mixed air temperature and outdoor air temperature.

Does anyone have any experience with a similar issue? Curious to know if this can be solved with a different setpoint manager/coil configuration, or if I'll need to leave the Designbuilder interface and/or utilize EMS code.