Resource

TRNSYS

Transient systems simulation program

A TRaNsient SYstems Simulation program

TRNSYS is a transient systems simulation program with a modular structure making it a flexible tool. It recognizes a system description language in which the user specifies the components that constitute the system and the manner in which they are connected. It includes graphical interface, a simulation engine, a library of components ranging from various building models to standard HVAC equipment to renewable energy and emerging technologies. The TRNSYS library includes many of the components commonly found in thermal and electrical energy systems - to simulate renewable energy-based power generation: PV systems, batteries, wind turbines, fuel cells - as well as component routines to handle input of weather data or other time-dependent forcing functions and output of simulation results. The modular nature of TRNSYS gives the program tremendous flexibility, and facilitates the addition to the program of mathematical models not included in the standard TRNSYS library. TRNSYS is well suited to detailed analyses of any system whose behaviour is dependent on the passage of time. TRNSYS has become reference software for researchers and engineers around the world. Main applications include: solar systems (solar thermal and photovoltaic systems), low energy buildings and HVAC systems, renewable energy systems, cogeneration, fuel cells. TRNSYS includes a method for creating new components that don't exist in a standard package. This simulation package has been used for more than 25 years for HVAC analysis and sizing, multizone airflow analyses, electric power simulation, solar design, building thermal performance, analysis of control schemes, etc.