Modeling of HVAC operational faults in building performance simulation

Modeling and Simulation of Operational Faults of Hvac Systems Using Energyplus

HVAC operations play a significant role among various driving factors to improve energy performance of buildings. Extensive researches have been conducted on the design efficiencies and control strategies of HVAC system, but very few focused on the impacts of its operational faults on the building energy efficiency. Modeling and simulation of operational faults can lead to better understandings...

Co-Simulation between detailed building energy performance simulation and Modelica HVAC component models

We discuss the application of the FMI Co-Simulation technology to building energy performance simulation, where detailed physical building models are coupled to Modelica-based HVAC component and plant models. First, we describe the generation process of the building FMU from our stand-alone building simulation program NANDRAD and sketch out internal algorithms for FMI version 2 capabilities. Th...

Simulation of Residential Hvac System Performance

A User-friendly Tool for the Integrated Simulation of Building Hvac Control Performance

Full simulation of a building’s HVAC control is important. Good control is the most cost-effective way to reduce plant size and save energy and maintenance cost. To address these issues the control designer needs an easy to use, but accurate tool that simultaneously solves the building thermal, the HVAC system and its control performance. We have developed such a tool. Our new simplified, yet e...

Robust Ventilation Control for Building Hvac Performance Optimization

Optimal building ventilation control is achieved combining demand controlled ventilation (DCV) and economizer control. The control instability during the transition processes between different control modes is among the major difficulties faced when combining DCV control with economizer control in applications. A robust control strategy, using “freezing”, gain scheduling, I-term reset and feedb...