GreenCity Simulation Library

Model connected energy systems dynamically, compare technical alternatives, and investigate operating and control concepts before implementation.

Product Overview

Investigating Energy Systems Before Implementation

The GreenCity Simulation Library supports the planning, optimization, and assessment of building, plant, and district energy systems in SimulationX. It combines models of generators, storage, networks, and consumers into application-specific overall systems. Technical interactions and alternatives can be investigated before plants are built or existing systems are modified.

Alongside thermal and electrical components, the library includes building and plant models, different storage technologies, and models for electromobility, controls, and user behavior. For research and pilot projects, custom models can be developed and integrated into existing systems.

Model coupled energy systems dynamically
Compare system and control alternatives
Assess planning and operation technically

Model Library

Functions and Model Coverage

GreenCity represents technical components and their interactions in dynamic energy systems. Models can be combined and extended for different system sizes and connected to measurement data or custom applications.

With GreenCity You Can

Investigate supply security
Assess renewable energy potential
Integrate energy storage into overall systems
Compare plant and control concepts
Plan charging infrastructure and vehicle fleets
Investigate heating and cooling supply
Compare energy demand, consumption, and operating and investment costs
Prepare SiL and HiL tests

Model Areas

Thermal components: Heat exchangers, heating and cooling elements, solar thermal, and thermal storage
Buildings and plants: Building variants, controllers, and calculation models
Electrical components: Grids, photovoltaics, wind energy, electromobility, and hydrogen
Storage: Models for electrical, thermal, and seasonal storage
Interfaces: Open Modelica interfaces for coupling your own controller applications

Applications

Example Models From GreenCity

Combined Heat and Power for a Street

The model represents a street’s space heating, domestic hot water, and electricity demand through load profiles. A combined heat and power plant supplies the consumers; thermal storage buffers heat load peaks. Among other things, the simulation shows how heat-led operation affects coverage of the electrical load.

Multizone Building With an Electric Vehicle

This example combines a two-zone building, an electric vehicle, a charging station, and battery storage. A photovoltaic system and a small wind turbine supply electricity; an air-to-water heat pump provides heating.

Office With Thermal, Cooling, and Ice Storage

The model investigates an office building with heating and cooling demand. A heat pump generates heat for building heating and cooling energy for building cooling. Ice storage buffers cooling energy seasonally, while sensible cooling storage provides short-term buffering.

Charging Station Supplied by Renewable Energy

The model represents an electric vehicle charging station with a photovoltaic system and electrical storage. It enables investigation of the extent to which vehicles can be charged with locally generated renewable energy.

Further models, extensions, and application examples are available on the product page.

Explore GreenCity