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Create Doe Prototype Measure, High-Rise Apartment I'm trying to run the Create DOE Prototype measure in OpenStudio for a

Nope, found a different modeling avenue for the problem we were working on and haven't circled back yet

PNNL Prototypical Residential Models in Openstudio Has anyone setup a successful workflow to generate an OpenStudio vers

PNNL Prototypical Residential Models in Openstudio Has anyone setup a successful workflow to generate an OpenStudio vers

Thanks for sharing that paper Eric! And Scott I completely agree, a lot of homes from the 60s and such are probably sign

Thanks for sharing that paper Eric! And Scott I completely agree, a lot of homes from the 60s and such are probably sign

So I feel like there is a bit of an idealization where even though the design loads according to the ACCA would specify

One of the odd things that we've found when digging into the ResStock simulations is that the system sizing is done off

Thanks! Will ask

Thanks for the detailed answer Eric! A follow on to this, when is the release of the EUSS-Res 2022.2 expected?

I am digging into the heat pump modeling and ResStock and was surprised at the amount of supplemental heating energy used by ASHPs in the simulations. For instance, in climate zone 5A, the supplemental heating coil consumes almost as much electricity as the heat pump over the course of the year for one particular simulation I looked into. One thing that stuck out to me is that the heat pump heating coils are sized smaller than I would think they are in the field. For instance, a 1700 sqft single family home gets a 2 ton heat pump. Would think that most contractors would put a 3 ton system since unfortunately rules of thumb seem to be widely used for existing home installations. This smaller sizing would result in the heat pump satisfying less load than it could if it were sized larger and greater use of the backup electric resistance heat.

Since these values are hard coded into the IDF files, can anyone from NREL (tagging you guys @shorowit and @Eric_Wilson) explain the sizing or point me towards some documentation on it?

In addition, how does the simulation call the DX heat pump and supplemental coils? If the DX coil capacity is able to satisfy the load, then does the supplemental coil stay off? Once both are required, does it call them simultaneously and each coil is activated at their rated capacity at given temp/conditions? So for instance, if 100 BTUs are required in an hour and the heat pump can only supply 78 BTU/h, does the backup coil get activated and let's assume it's capacity is 140 BTU/h so that the heat pump only ends up supplying 100*(78/(78+140)) = 35 BTUs for that hour.

Or is it a topping off method, where the heat pump supplies 78 BTU for the hour and the supplemental heat supplies 22 BTU. This would obviously be preferable energy consumption wise but would require a lot more complicated control algorithm to modulate the supplemental heat pump heating coil contribution which probably isn't industry standard for heat pumps in the field right now.

@shorowit tagging Eric failed, how do you tag a user with a space in their name?

Heat Pump & Supplemental Coil Sizing and Control in ResStock I am digging into the heat pump modeling and ResStock a

Heat Pump & Supplemental Coil Sizing and Control in ResStock I am digging into the heat pump modeling and ResStock a

Heat Pump & Supplemental Coil Sizing and Control in ResStock I am digging into the heat pump modeling and ResStock a

Hi @ChristianKohler did you ever find or develop EnergyPlus residential models with Cold Climate ASHPs? I am looking for

@morgan_energy did you ever figure this out? Am checking some of the PNNL prototypical res models and seeing the same th

Haha oh man, thanks for the clarification, I'm actually working with Hamza on this . . . thought someone else was trying

Hey @Aaron Boranian did you get this to work? We are trying to do the same thing and we can get the HPXMLtoOpenStudio me

Hi @mfath, were you able to generate a working OSM file?

Hi mfath, were you able to generate a working OSM file?

Hey Aaron, did you get this to work? We are trying to do the same thing and we can get the HPXMLtoOpenStudio measure to

So the Create DOE Prototype measure for Openstudio does not include a Supermarket/Grocery store building type. Does anyone know if there is a normative OS model available for supermarkets anywhere? I have checked the BCL but didn't find anything. My last resort is to import the Supermarket Commercial Reference Building IDF, has someone already done this and added the HVAC and Refrigeration systems?

I am using a text editor to build an OS measure which sets the occupancy load of a building. In building the measure, I am using the following code to test what the old definitions for occupancy load are:

require 'openstudio'
require 'openstudio/ruleset/ShowRunnerOutput'
require 'test/unit'

class SetNew_Test < Test::Unit::TestCase

def test_SetNew_a

# load the test model
translator = OpenStudio::OSVersion::VersionTranslator.new
path = OpenStudio::Path.new(File.dirname(__FILE__) + "/OldModel.osm")
model = translator.loadModel(path)
assert((not model.empty?))
model = model.get
puts "Model Loaded"

model.getSpaceTypes.each do |space_tp|
    #loop through all people definitions in the space type
    space_tp.people.each do |people|
      #get the old od from the existing definition, if exists  
        old_people = people.peopleDefinition.peoplePerFloorArea.get
        puts old_people
    end
end

end
end

I checked the file in OS and the building does define the occupancy load in terms of people per floor area, however, I get the following error from the command line:

undefined method 'peoplePerFloorArea'

I have tried several different classes that should exist, such as lighting power density, schedules, etc. However, each time I get the same error that the method does not exist . . . I would appreciate any comments that might lend some insight into what I am doing wrong

Hi, is there an easy way to view the total capacity of the installed electrical equipment and/or lighting for a building model in eQUEST? I have searched through the detailed output files but nothing seemed to provide this data.

Thanks in advance for any insights!

Here is the model the only modification that I made after applying the NZEHVAC measure was to delete the ERV from the D

Here is the model the only modification that I after applying the NZEHVAC measure was to delete the ERV from the DOAS a

Here is the model model the only modification that I after applying the NZEHVAC measure was to delete the ERV from the

@mdahlhausen Thanks for the quick response. Using those coil output variables is exactly what I usually do for other HVA

Calculate seasonal average COP for VRF system I have a model that I applied the "NZEHVAC" BCL measure to in order to add

Hi, does anyone know if there is an EnergyPlus or OpenStudio prototypical building for a marijuana growing facility? Haven't found a typical building model for this in any of the commonly known sets.

Prototypical building for grow facilities Hi, does anyone know if there is an EnergyPlus or OpenStudio prototypical buil

Prototypical building for grow facilities Hi, does anyone know if there is an EnergyPlus or OpenStudio prototypical buil

Are there any forthcoming measures that will allow the OpenStudio versions of the Commercial Reference Buildings to be scaled is size?

@David Goldwasser ok makes sense. And is there a plan to make a more generally applicable form of the measure that works