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ResStock Turn HVAC Off in Apply Upgrade Error

asked 2021-03-19 13:11:33 -0500

sashadf1 gravatar image

Hi,

I am using ResStock v2.2.4, OpenStudio v2.9.0, and EnergyPlus v9.2.

My housing_characteristics tsv files are edited to have the following distributions: 100% CR09 in Location Region.tsv, 100% Asheville Regional Airport in Location.tsv, 100% Propane in Heating Fuel.tsv and 100% SEER 15 Central AC in HVAC System Cooling.tsv.

This means I am fixing the baseline HVAC equipment and minimizing geospatial extent of the sample.

I am trying to use PAT to turn off HVAC equipment, keeping all the other building characteristics in the sample the same.

I have done this by specifying in the Apply Upgrade Measure Option 1 field;

HVAC System Heating Propane|None

and similarly in the Apply Upgrade Measure Option 2 field:

HVAC System Cooling|None

Both of these parameter|option pairs I sourced from options_lookup.tsv.

Apply Upgrade Measure

When I ran my simulation, all of my columns in results.csv in localResults were blank, and I could not find an enduse_timeseries.csv file in any of my data_point.zip folders.

Any idea why this is happening?

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I don't at all follow. You are evaluating an upgrade to existing homes where you remove the HVAC systems? Why?

shorowit gravatar image shorowit  ( 2021-03-19 17:24:45 -0500 )edit

We want to simulate the building stock with and without HVAC because that allows us to get rudimentary estimates of thermal mass and conductivity. The Apply Upgrade measure should allow us to remove the HVAC system so we can measure the zone air temperature for the exact same building stock without HVAC in place.

sashadf1 gravatar image sashadf1  ( 2021-03-19 17:35:34 -0500 )edit

I am getting completed, invalid workflow for all datapoints in which I try to set the HVAC system parameter to option "None."

sashadf1 gravatar image sashadf1  ( 2021-03-30 11:36:33 -0500 )edit

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answered 2021-04-12 08:36:45 -0500

sashadf1 gravatar image

Instead of using Apply Upgrade to turn off/remove the HVAC, we are instead setting the heating/cooling capacity and cfm in the hvac_sizing.rb file to ~0 or very low numbers (as low as E+ will allow without failing). This is an approximate solution but for our purposes still works. We are basically making the impact of HVAC on the building thermodynamics negligible, instead of non-existent.

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Asked: 2021-03-19 13:11:33 -0500

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Last updated: Apr 12