sfAhuRulesExt

A pod of rules targeted at AHUs.
sfAhuRulesExt

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v1.1.0

Overview

Welcome to SkySpark's AHU Rules Extension! As of today, there are 5 functions in this package - 3 come directly from ASHRAE 55.

ruleAsh55Rate(theAhu, dates, thresh1: 2.0Δ°F, thresh2: 4.0Δ°F)

ASHRAE 55-2013 states that a zone cannot change by more than 2.0°F in 15min

or 4.0°F in 1hr
  • Side Effects: Converts units to units of thresholds
  • Inputs: 1) An ahu with a zone air temp sensor point
  • 2) a date-range or single day
  • 3) optional - threshold1 (default 2.0Δ°F)
  • 4) optional - threshold2 (default 4.0Δ°F)
  • Output: When temp change is too fast
  • ruleAsh55Rate(read(ahu), yesterday)
  • ruleAsh55Rate(read(ahu), yesterday, 3.0Δ°F, 5.0Δ°F)

ruleAsh55Speed(theAhu, dates, area: 1ft², thresh: 30ft/s)

ASHRAE 55-2013 states flow of < 30ft/sec

  • Side Effects: Converts units to units of threshold
  • Inputs: 1) An ahu with an air velocity or air flow point
  • 2) a date-range or single day
  • 3) optional - duct area (default 1ft²)
  • 4) optional - different threshold (default 30ft/s)
  • Output: When velocity is too fast
  • ruleAsh55Flow(read(ahu), yesterday)
  • ruleAsh55Flow(read(ahu), yesterday, 2ft², 15ft/s)

ruleAsh55Temp(theAhu, dates, theMin: 66°F, theMax: 84°F)

ASHRAE 55-2013 states a range of 66°F to 84°F in a zone

  • Side Effects: Converts units to units of thresholds
  • Inputs: 1) An ahu with a zone air temp sensor point
  • 2) a date-range or single day
  • 3) optional - threshold1 (default 66°F)
  • 4) optional - threshold2 (default 84°F)
  • Output: When temp is extreme
  • ruleAsh55Temp(read(ahu), yesterday)
  • ruleAsh55Temp(read(ahu), yesterday, 70°F, 80°F)

ruleExTrans(thePoint, dates, thresh: 10)

Excessive mode transitions with derivatives (needs sfxCalculusExt)

  • Side Effects: None
  • Inputs: 1) A boolean point
  • 2) a date-range or single day
  • 3) optional - threshold in flips/h (default 10)
  • Output: When a boolean changes states too many times
  • ruleExTrans(read(cool), yesterday)
  • ruleExTrans(read(heat), yesterday, 5)

ruleVavSmall(theVav, dates, thePercent: 98%, theLength: 3hr)

Vav undersized; working too hard for too long

  • Side Effects: None
  • Inputs: 1) A vav with a fan of kind numeric
  • 2) a date-range or single day
  • 3) optional - percent threshold (default 98%)
  • 4) optional - time threshold (default 3hr)
  • Output: When a vav's fan is near full power for too long
  • ruleVavSmall(read(vav), yesterday)
  • ruleVavSmall(read(vav), yesterday, 95%, 2hr)

Please contact adam@skyfoundry.com with any questions.

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sfAhuRulesExt
A pod of rules targeted at AHUs.
FREE
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Also available via SkyArc Install Manager
Package details
Version1.1.0
Licensen/a
Build date2 weeks ago
on Tue 30th Mar
Depends on
File namesfAhuRulesExt.pod
File size23.54 kB
MD50ac8da9f2ba21db6696a15c02d64bdc4
SHA1 69e406cc97060c806d3d6292dc58032caef7718f
Published by
SkyFoundryDownload now
Also available via SkyArc Install Manager
Tags
Fantom Pod