A holistic fault impact analysis of the high-performance sequences of operation for HVAC systems: Modelica-based case study in a medium-office building

ASHRAE Guideline 36: High-performance sequences of operation (SOO) for Heating, Ventilation, and Air-conditioning (HVAC) Systems has been demonstrated to save 17%-30% energy under ideal simulation environments. However, HVAC systems are susceptible various types faults in a real building operation. There no existing studies that pertain comprehensive fault impact analysis the high-performance control suggested by 36 systems. How these handle adapt is still largely unknown. In this context, robustness assessment conducted. A Modelica-based medium office virtual testbed developed following air-side plant-side SOO. total 359 scenarios three different seasonal operating conditions (cooling, shoulder, heating seasons) injected into baseline model. The evaluated key performance indexes (KPIs) include operational cost, source energy, site loop quality, thermal comfort, ventilation, power system metrics. most negative identified over all KPIs. results also show well adapted vast majority (∼90%) KPIs study.