Skip to content
New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Add smart defaults for evaporative coolers #1807

Merged
merged 1 commit into from
Sep 11, 2024
Merged

Add smart defaults for evaporative coolers #1807

Changes from all commits
Commits
Show all changes
1 commit
Select commit
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
8 changes: 7 additions & 1 deletion lib/openstudio-standards/prototypes/common/objects/Prototype.hvac_systems.rb
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -4489,10 +4489,16 @@ def model_add_evap_cooler(model,
programs << avail_program

# Direct Evap Cooler
# @todo better assumptions for evap cooler performance and fan pressure rise
# @todo better assumptions for fan pressure rise
evap = OpenStudio::Model::EvaporativeCoolerDirectResearchSpecial.new(model, model.alwaysOnDiscreteSchedule)
evap.setName("#{zone.name} Evap Media")
# assume 90% design effectiveness from https://basc.pnnl.gov/resource-guides/evaporative-cooling-systems#edit-group-description
evap.setCoolerDesignEffectiveness(0.90)
evap.autosizePrimaryAirDesignFlowRate
evap.autosizeRecirculatingWaterPumpPowerConsumption
# use suggested E+ default values of 90.0 W-s/m^3 for pump sizing factor and 3.0 for blowdown concentration
evap.setWaterPumpPowerSizingFactor(90.0)
evap.setBlowdownConcentrationRatio(3.0)
evap.addToNode(air_loop.supplyInletNode)

# Fan (cycling), must be inside unitary system to cycle on airloop
Expand Down