TRNSYS是模块化的动态仿真软件，所谓模块化，即认为所有系统均由若干个小的系统（即模块）组成，一个模块实现一个特定的功能，因此，在对系统进行模拟分析时，只要调用实现这些特定功能的模块，给定输入条件，就可以对系统进行模拟分析。某些模块在对其他系统进行模拟分析时同样用到，此时，无需再单独编制程序来实现这些功能，只要调用这些模块，给与其特定的输入条件就可以了。

瞬间系统仿真程序（TRaNsient System Simulation Program TRNSYS）用于HVAC系统分析及尺寸定位、太阳能设计、自然采光、建筑物的热性能及控制方案等分析，并且利用组成程序处理天气输入或其他与时间有关的压力函数及仿真结果输出。由于它利用了模拟法，所以再不同的复杂程度下仿真多种热系统很灵活，其所提供的能源代码及文献为用户修改或把非标准构建添加到程序库中提供了简便方法。它可以在任一支持标准FORTRAN77（DOS、Unix、VMS）的平台中使用。

TRNSYS is a transient systems simulation program with a modular structure. 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. The TRNSYS library includes many of the components commonly found in thermal and electrical energy systems, 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.

Simulation Studio: The Graphical Interface for TRNSYS

Introduction : 

The TRNSYS Simulation Studio, developed by the Centre Scientifique et Technique du Bâtiment in Sophia Antipolis, France, was added to the TRNSYS package in 1996. In its first form the Simulation Studio (then known as "IISiBat" was a general simulation environment program that was been adapted to house the TRNSYS simulation software. With the release of TRNSYS 15, IISiBat became much more customized for TRNSYS's needs and with the release of TRNSYS 16, became a shell for the entire TRNSYS simulation process. These functions include creating and editing input files, creating new components, generating HTML based documentation, displaying listing and output files, plotting results, offering online help, running parametric simulations, and providing shortcuts for several repetitive tasks such as Fortran and C++ compiling and linking.

The figure above shows the Simulation Studio Assembly Panel used to create and work with TRNSYS simulations. This main window contains many descriptive icons with lines connecting them to form a system. Each icon represents a different component (eg. pump, solar collector, steam trap, etc.). The user drags the necessary icons into the Assembly Panel from the directory structure on the right. The user then creates links between components that share information. The lines connecting the icons represent the pipes and wires that connect the physical components. While several connections are possible between two components, just one link is displayed. To view or change the input and output connections, the user clicks on the link itself to view a detailed window. A series of Tools around the top and left borders of the Assembly Panel window allow the user to place icons onto the working area, connect the icons as necessary, run the simulation, access the editor, access the spreadsheet and plotting packages, and perform many other functions. 

Double clicking on any of the links between components allows users to set the data that flows between the two in a link window.

Double clicking on one of the components itself allows users to obtain detailed information about the component, its origin and its underlying assumptions.

Creating A Simulation:

Simulations can be created based on a set of Templates and Wizards...