Determine if zone cooling is undersized

Applicable Systems

  • NIST: APAR13, APAR19
  • Secondary: VAV, FCU, UV, UH, RAD, RHT

Objective/Method/Outcome

  • Objective: Determine if an air cooling system is at full capacity but unable to meet set point. Based on NIST APAR 13 and 19.
  • Method: Check if the RT is more than 2 degrees above its set point when the CCV is at its maximum value during occupied hours.
  • Outcome: An insight is generated if the RT is more than 2 degrees above its set point while the CCV has been fully open for more than 8 hours per week.

Logic

If(RT - SP > Temperature Threshold && CCV > 98% Open) { return true; }
Determine if zone cooling is undersized

Inputs

  • RT {sensor, zone, air, temp} (Real Trend Log)
  • CCV {cmd, cool, water, valve} (Real Trend Log)
  • RT SP {sp, zone, air, temp} (Real Trend Log)
  • Occ {occupied} (Binary Trend Log)
image_printPrint