VAVMinimumTurndownDuringReheat

Brief Description

When a vav box is in reheat mode, the ratio of vav airflow rate to vav max airflow rate must not be greater than the min design turndown ratio

Index Description

  • Section 6.5.2.1 ASHRAE 90.1-2016

Datapoints Description

  • reheat_coil_flag: VAV box reheat coil operation status

  • V_dot_VAV: VAV airflow rate

  • V_dot_VAV_max: VAV max airflow rate

  • VAV_min_turndown_design: design VAV box min turndown ratio

  • turndown_tol: VAV turndown tolerance

Type Verification Description

Rule-based

Assertions Type

Pass

Assertions Description

  • if reheat_coil_flag:

  • if V_dot_VAV_max == 0

  • Untested

  • if V_dot_VAV_max > 0.0 and V_dot_VAV / V_dot_VAV_max > VAV_min_turndown_design + turndown_tol

  • fail

  • else:

  • pass

  • else

  • Untested

  • end