TRNSYS

TRNSYS (abbreviated: Transient simulation SYstems; German about: transient system simulation ) is a tool for the simulation of systems and buildings. The program was developed in 1975 at the University of Wisconsin for the simulation of a solar system. For programming Fortran was used. The modular design of the application allows to solve a variety of problems. Besides the simulation of solar systems, the program has established itself primarily in the area of low-energy buildings, technical equipment such as air handling units, heat pumps, chillers and heaters, as well as cogeneration and fuel cells.

Application

A major application area is the thermal energy building simulation. After entering the geometries and boundary conditions of one or more zones of the building can make a statement about the temperature in the zones with the help of a weather record for the building. This is instructive for the design of solar protection devices, windows or cooling systems. The use of solar energy and heating requirements can be optimized so. Furthermore, the simulation allows the design and optimization of control strategies such as for sun protection control or natural night ventilation. The output of the results ( room temperatures and heat demand ) is done graphically. These results, as well as peak heating and cooling loads and energy requirements are also output in ASCII format and can then be further processed ( eg by means of spreadsheet ).

Swell

• TRNSYS University of Wisconsin