Dynamic Thermal Modelling

Dynamic Thermal Modelling


Dynamic thermal modelling is an important part of designing and delivering sustainable buildings. Creating a 3D model of a proposed development, for example a commercial or education building, enables a dynamic analysis of the building’s predicted performance in terms of yearly energy usage and internal comfort temperatures. This information helps architects and building service engineers to make sound decisions in order to achieve effective sustainable development, both in terms of the environmental impact and cost involved.


The Dynamic Thermal Modelling Process


The initial stage is to ‘build’ the model. Models are drawn in 3D typically using the architect’s plan drawings and information such as the building orientation, geographic location and construction materials is entered. Individual rooms are assigned information which describes their function, for example classroom or office space. Any nearby buildings not necessarily part of the development are also taken into account at this stage as they may have an impact in terms of shading etc.


Once the model is complete it is possible to determine steady state heat loss/gain information, or to dynamically simulate a period of time (typically a year) that the building is in operation. This simulation takes into account all of the variables input at the building stage, such as the thermal performance of the materials, yearly weather information, occupation periods of the building and occupant use.


What are the Benefits of Dynamic Thermal Modelling?


The information can be used to determine suitable design approaches in order to effectively reduce energy consumption and carbon dioxide emissions. By making changes within the model such as introducing more thermal mass, a natural ventilation system, night time cooling or more efficient light fittings and equipment, and then re-running the simulation it is possible to see what impact this would have and whether or not it would be a suitable approach.


The software can also be used to ensure that the building designed complies fully with the Part L building regulations and any other relevant thermal regulations such as Building Bulletin 101 in the case of schools.


JPA can carry out dynamic thermal modelling service from the initial stages of creating a model, through to producing a detailed thermal performance analysis of the building. This service includes:


• steady state heat loss/gain calculations (CIBSE loads),

• Summer Overheating analysis,

• Daylight Studies,

• Overshadowing Studies,

• Right to Light Analysis and

• Compliance with Conservation of Fuel and Power Building Regulations.