chongman99's profile - activity

RECS data of EUI is useful but should be used cautiously because of regional differences. RECS doesn't give you the exact location; it just gives you the state or group of states. However, if your state is California, this can give you a very large range. It might not work as a "gut check".

And thanks for chatting with me at ASHRAE St Louis.

Use the degree days to restrict to the region you are modeling. kBTU/sf/DD may be more useful as it normalizes weather a bit

the codebook here details the variables. Relevant variables are TOTALBTU and HDD65 CDD65 HDD30YR CDD30Y and all *SQFT variable

Thanks. This worked. Note to others, that when using the idf generated by BEOpt 2.4.0.1 beta, I had to convert the IDF file from 8.1.0 to 8.3.0 and then make the find/replace that David suggested.

Then I took the 1.eso file, found the output that I wanted (in my case 683), and ran a sed -n "/^683/" command to extract the lines I wanted. Here is an link to image of the 3-minute interval data for indoor temperature

Thanks. My specific use case is for teaching. By showing the 1-minute timestep, students are better able to intuitively understand the heat leakages rates inherent in different designs (as specified in BEOpt). In particular, we look at the indoor temperature trend when the nighttime setback turns the HVAC system to off.

Your comments on not modeling bang-bang (i.e., the indoor temperature will perfectly match the control point) and not getting sub-hourly effects (from weather or schedule) are noted and appreciated.

Using EnergyPlus: I am able to get hourly data of many variables and view in Data Viewer (see image below).

Instead of hourly, I'd like to get this data at the 1-minute or 3 minute frequency.

I know that via the IDF editor, I can change the "Number of Timesteps per Hour", but this doesn't change the output.

NOTE: I am using BEopt and, alternatively, directly running EnergyPlus (EP-Launch) with input files generated from BEopt.