Simulation calculations

We work with multi-vendor construction programs to simulate an optimal and independent construction for our customer's systems.



Design of solar thermal systems

We work with the dynamic simulation program T * SOL from Dr. Valentin. With this program several systems can be calculated and simulated. Questions such as alignment, declination, collector area, storage size, yield losses or if a tree or a building casts shadows can be answered. The result is a technically optimized solar system with precisely matched components. This provides a detailed energy balance of the solar system. All energy flows are clearly visualized. A simulation of the yield in the early stages of the project may contribute to minimize investments.

Temperature gradients

We calculate and analyze the energy requirements for heated and air-conditioned buildings in accordance with VDI 2067 part 10 + 11 on the basis of real hourly weather data throughout the year. The energy requirement can consist of heating, cooling, humidifying and dehumidifying. User profiles can be considered which allows calculations of heating-up performance, cooling, etc.


Based on individual diurnal variations, temperature cycles and oscillating room temperatures for example in lobbies, staircases, basements and underground parking lots, taking into account internal loads, can be simulated at the respective location. This results in optimization of air vents, reflow surfaces, sun protection and insulation thicknesses. Heating and cooling energy requirements can be displayed. The frequency of exceeding specific temperature classes, ramifications of sun protection measures and outer wall designs as well as the influence of storing components on thermal comfort can be displayed. The efficiency of night ventilation can be determined.

Planning and simulation of heat pump heating systems

Trouble-free long-term operation and the lowest possible power consumption are essential for the usage of heat pump systems. With the help of simulations mutual influences of technical parameters on the heat pump and temperatures in the source and in the heating water including statements of operating characteristics can be displayed. Based on the monthly average temperatures at the building site and the heat load of the house the required amounts of heat and hot water temperatures can be simulated. Hot water preparation is included in the simulation. For surface heating plants in the soil characteristics of the soil as well as the symmetry during installation are considered. Run-times, power consumption and withdrawal are summed up to calculate the annual coefficient and the operating costs.


  1. Calculation of annual coefficient and the installation consumption figure, the operating and investment costs for different heat pumps (brine, air, water, direct expansion, special applications), design of heat pump and dimensioning of heat sources
  2. Calculations including thermal solar systems
  3. System comparison / application limits
  4. Operating modes: monovalent, monoenergetic, bivalent
  5. Calculations of soil cooling with an iterative process




Simulation of geothermal probe fields

The design and construction of near-surface geothermal systems must be in accordance with the VDI guideline 4640 " Thermal usage of the subsoil", Part 1 - 4 to be carried out .