As a supplement to the TRNSYS standard package we offer you additional components of various kinds. Usually, each of the component/library comes with a dynamic link library (*.dll), source code, a TRNSYS Model File (*.tmf) to use in the Simulation Studio interface, and an example that demonstrates typical uses of the component model.
Complex Glazing Systems
AddOn for multizone building model (Type 56)
This AddOn enables the calculation of complex glazing systems within the multi-zone building model (Type 56). Particularly the bidirectional scattering of radiation which e.g. occurs in slat systems or honeycomb structures and their interaction with other layers is considered in the model. In addition, the heat transfer processes between panes, spaces between panes and shading elements are calculated in detail. Additionally, the influence of openings in shading elements on convection and long-wave radiation exchange can be modelled.
Rhinoceros 5 und Grasshopper Plugin
TRNLizard is an input mask for Rhinoceros/Grasshopper for the simulation of 3D geometries in connection with different ventilation, heating and cooling concepts using the multi-zone building model Type 56 and numerous other TRNSYS types. TRNLizard allows the parametric modelling of 3D-geometries with TRNSYS.
Airflow simulation in buildings
TRNSYS thermal mutlizone building model, type 56, requires air flows between zones as input values. However, in natural ventilation systems these depend on the wind pressures and the inside and outside temperatures. To account for this situation, a coupling with an air flow model is absolutely necessary. TRNFLOW integrates the multi-zone air flow model COMIS into the type 56. An internal solver, optimized for this task, iterates in each time step between the two models until their solutions are consistent.
Construction Component with PCM and TAB
This component models a construction component where one layer may be a phase change material (PCM). In addition, the thermal active systems (TAB) can be modelled. The construction is modeled by a Crank-Nicolson algorithm. The model can be linked to the multizone building model (Type 56).
Detailed Ventilation System
With this model, almost all operating modes of a ventilation system can be represented: heat recovery, heating, cooling, humidification and dehumidification, adiabatic exhaust air humidification, economizer and recirculation mode. In addition, the frost protection temperature for the heat recovery unit and a bypass mode can be defined. The component can be coupled with the multi-zone building model (Type 56) for detailed calculation of supply air conditioning.
UNICOLL Unglazed Collector
The program UNICOLL can be used for the optional simulation of glazed or unglazed collectors. Next to the computation method for collectors this program contains a rule algorithm for mass flow. Mass flow or collector outlet temperature can be entered as time dependent input.
Detailled Collector Model
This component models the thermal performance of a flat plate collector in detail. It considers the heat capacity of the collector and the fluid as well as the transport time of the fluid through the collector. In addition, there are options to account for the temperature dependence of the collector U-value and the incident angle of various solar radiation components.
This model is quite universal, so it should be possible to simulate nearly all kinds of stores used for solar thermal systems. It offers the following modelling options: a stratified fluid storage tank with at most four heat exchangers, an internal electrical auxiliary heater and a maximum of ten times twice connections for direct charge and discharge.
The air-to-soil heat exchanger accounts for sensible as well as latent exchanges between airflow and tubes, diffusion into surrounding soil, frictional losses and flow of condensed water along the tubes. Local heating from integrated fan motor can be taken into account at tube inlet or outlet. Direction of airflow can be controlled (stratification in case of heat storage) and flexible geometry allows for inhomogeneous soils as well as diverse border conditions.
Vertical Borehole Heat Exchanger
With this TRNSYS type, vertical borehole heat exchangers with double-U-pipes can be simulated. The transient heat flux in the earth within a radius of about 2 m around the borehole is modelled in detail with the Crank-Nicholson algorithm. For the outer boundary condition, an analytical formula for constant heat extraction is applied.
Author: M. Wetter, T. Afijei
ICEPIT Storage Model for Heat and Cold Storage
This type offers a simulation program for vertically stratified storage bed for heat and cold storage. The model can be used for the simulation of ice reservoirs, because the change of the aggregate state is implemented liquid/solid. The differential equations are solved with a combined analytical/numerical method. The storage tank can have either the shape of a truncated cone or a vertical circular cylinder. The storage area is divided into n horizontal layers. The height of these layers is freely selectable, i.e. a non-equidistant grid is also possible. Each layer can be equipped with a pipe coil. The soil and the thermal insulation layer above the storage area are automatically divided into a radially symmetrical two-dimensional grid.
Indoor and Outdoor Pool
This component models an indoor / outdoor pool based on heat and mass balance. Thereby the heat flow rates by evaporation, convection, solar radiation, long-wave radiation, fresh water supply, heating and conduction are considered. The model for indoor pools can be coupled with the multi-zone building model (Type 56).
Seasonal Ground Heat Storage (XST)
The stratified storage temperature model simulates heat storage in a water-filled tank, pond, or rock cavern. In the surroudingsurrounding ground a 3-dimensional diffusive heat flow is modelled. The vertical heat transfer between two storage layers is modelled by a combination of diffusion and convection. The surrounding soil is mapped by means of three-dimensional, diffuse heat flow. Storage layers and surrounding soil are coupled via the storage walls.