What is TRNSYS?

TRNSYS (TRaNsient SYstem Simulation program) is a software environment used for simulating the behavior of transient systems, particularly energy systems. It is commonly used by engineers and researchers to model and analyze the performance of buildings, HVAC systems, renewable energy technologies (like solar thermal and photovoltaic systems), and other complex thermal and energy-related systems. It allows for detailed simulations of energy flows and system performance over time, taking into account factors like weather conditions, building characteristics, and control strategies. It is used for design optimization, performance prediction, and research purposes in the fields of energy engineering and building science.