Dynamic Simulation Modelling

What is DSM in buildings?

Dynamic Simulation Modelling (DSM) is a computational technique that simulates the energy performance of a building over time, considering hourly variations in weather, occupancy, lighting, and equipment use. Unlike standard steady-state calculation methods (like those used in SBEM), DSM evaluates the real dynamic interactions within a building, such as thermal inertia, solar gains, and HVAC system control strategies.

The following energy efficiency–related analyses and tasks can be performed:

- Dynamic thermal energy simulation

- Heating and cooling demand assessment

- Hourly load profiling

- Shading analysis

- Energy Performance Certificate (EPC)

- Daylighting and daylight factor analysis

- Passive design strategy optimisation

- HVAC system performance simulation

- Lighting energy consumption analysis

- Renewable energy integration and impact assessment

This article will focus on the use of DSM to improve the accuracy of Energy Performance Certification processes.

By integrating DSM into the EPC process, stakeholders can achieve more accurate ratings, comprehensive recommendations, and optimised resource use, ultimately contributing to cost savings and a lower carbon footprint.

Dynamic Simulation Modelling (DSM) is a powerful tool to enhance building energy performance assessment. As the construction sector moves toward smarter and more sustainable buildings, DSM has emerged as a key method for evaluating and optimizing energy use. DSM allows designers, owners, and energy assessors to understand a building’s energy behaviours with high precision, providing insights that go beyond standard calculation methods.

When is DSM applied?

To improve the accuracy of EPC ratings, particularly for complex or high-performance buildings.
During design stages to compare different strategies for insulation, glazing, or HVAC systems.
To assess “as-built” performance and validate energy efficiency measures before handover.
For evaluating retrofit options in existing buildings, ensuring recommendations are practical and cost-effective.

Why is it important?

Precision: DSM provides a more detailed and realistic picture of building energy behaviour than conventional methods.
Comprehension: It allows stakeholders to understand which systems or design choices have the greatest impact on energy consumption.
Thoroughness: Detailed simulations cover hourly energy use, comfort levels, and seasonal variations.
Resource optimisation: By analysing multiple scenarios, DSM identifies the most efficient combination of measures, saving time, money, and materials.

What are the implications for EPCs?

DSM can support higher EPC ratings by accurately representing the building’s energy performance.
It provides evidence for proposed energy-saving measures, enhancing the credibility of EPC improvement recommendations.
In complex or non-standard buildings, regulators or certifying bodies may request DSM-based validation to ensure compliance

Learn More About EPCs

How do we work?

We offer a simple, clear and professional process:

Initial meeting: We review your project or existing building, analyse systems and building envelope, and check applicable regulation in Gibraltar.
Calculation preparation: We use the SBEM-GI methodology and work with an accredited assessor in Gibraltar to ensure compliance.
Inspection and data collection: For “as-built” cases, we visit the completed building to gather real data: insulation, windows, HVAC systems, etc.
EPC issuance: We deliver the EPC along with a report containing energy-improvement recommendations tailored to your building.
Delivery and registration: We hand over the certificate to the owner, make it available to the buyer/tenant as required, and ensure registration.
Follow-up: If energy improvements are made later, we can advise on updating the EPC and improving the rating.

Conclusion

For new builds, renovations, or existing properties in Gibraltar, integrating DSM into the EPC process ensures accurate, comprehensive, and optimized energy assessments. We help you implement DSM in your projects to enhance EPC accuracy, deliver better recommendations, and maximise the efficiency and value of your property.