Current research projects

Image Heat2Power
Image Thermostatic Expansion Valves
Image Investigation of material-dependent parameters
Image Thermal engines
Image Reducing the filling quantity
Image Cryostats, Non-Metallic and Metallic
Image 3D - Air flow sensor
Image Software modules
Image Testzentrum PLWP at ILK Dresden
Image Software for test rigs
Image Cryogenic liquid piston pumps for cold liquefied gases like LIN, LOX, LHe, LH2, LNG, LAr
Image Certification of efficient air conditioning and ventilation systems through the new "indoor air quality seal" for non-residential buildings
Image Certifiable connection types in cryogenics
Image Investigation of coolants
Image Energy efficiency consulting - cogeneration systems
Image Hydrogen and methane testing field at the ILK

You are here:   /  Home


Combined building and system simulation

Industry and building technology

upon request

Dipl.-Ing. (FH) Hannes Rosenbaum

+49-351-4081-5324

Scientific analysis of thermodynamic processes in buildings and its systems

TRNSYS

TRNSYS (TRaNsient SYstem Simulation Program) is a software for dynamic system simulation based on numerical routines for solving partial differential equations. ILK Dresden uses TRNSYS to calculate simple heat transport and heat storage processes as well as complex building and energy system models in a multi-zone model.

Thermal simulations of multi-zone building models

... allow the calculation of time-resolved and statistically evaluable (dynamic) sequences of:

  • Air-condition variables (temperature and humidity) and surface temperatures
  • Sensitive and latent loads (heating load, cooling load, ...)
  • Energy flows and balances between neighboring zones
  • Weather and radiation data as well as their influence on the zones and individual components of the building

... support planning processes as well as R&D tasks and answer important questions, such as:

  • Dynamic behavior of a room or a zone
  • Influence of building physics and constructional characteristics of the building envelope
  • Periods with actual values above or below specified setpoints
  • Switching criteria for control circuits
  • Effect of additional thermal storage (sensitive/latent) (e.g., PCM)
  • Comparison of different sun protection and shading devices including their control

The building model also takes into account the building structure (geometry, characteristics of component and assemblies, weather data), the utilisation as well as requirement and load profiles. It is supplemented by active components and individually programmed inputs.

The numeric routines of TRNSYS are based on standardized calculation methods (including DIN EN ISO 13791 and DIN EN ISO 13792).

Combined building and system simulations

… are based on a connection of the building model with the model(s) of technical system(s) … enable detailed investigations taking into account the interaction between the technical systems and the building

Combined building and system simulation usually involve the calculation:

  • Timing of performance requirements for a technical system or its components
  • Of ultimate and primary energy requirements (annual and total values) as reference values
  • Temporal changes of surface temperatures and air condition variables (temperature and humidity) or other actual values as a function of the performance parameters of the modeled systems
  • Of periods with actual values above or below specified setpoints

The results of building and system simulation help

  • To evaluate the functionality and the mode of operation of different building concepts or energy concepts, regarding to energy efficiency and sustainability,
  • To analyze the influence of different system configurations, system power as well as control scenarios on the thermal behavior of the building,
  • To determine the requirement profile of each system component, and
  • ILK to develop HVAC components.

ILK Dresden also uses dynamic building and system simulations with TRNSYS to determine the boundary conditions for CFD simulations.

Simulation of thermal systems

...are useful if the dynamic behavior of an installation is of interest. For modeling, the ILK Dresden uses both TRNSYS standard types as well as TESS models. A mathematical modeling of controls or thermodynamic relationships via characteristic models and magnitude equations are also possible.

System simulation applications of ILK are:

  • Representation of the thermal behavior of newly developed components or particular operating scenarios or control regimes
  • Comparison of the simulation results with measurement data taking into account thermal, temporal and control-related boundary conditions of the measurement
  • Simulation of the expected behavior and prediction of possible effects (energy inputs or yields, frequency of possible "worst-case" scenarios) of the modeled systems with changed boundary conditions
  • Derivation of possible optimization potentials



Your Request

Further Projects

Image

Intelligent innovative power supply for superconducting coils

Compact, powerful power supply with 4-quadrant converter

Image

Laseroptical measurement

PIV and LDA / PDA

Image

Multifunctional electronic modules for cryogenic applications

Electronic with less wiring effort - more than 100 sensors via one feedthrough

Image

Certifiable connection types in cryogenics

Detachable and permanent connections, adhesive bond / form closure / force closure

Image

Combined building and system simulation

Scientific analysis of thermodynamic processes in buildings and its systems