Using whole building simulation programs, Dynamic Simulation Modelling (DSM) is used to undertake Thermal Modelling, calculate energy consumption, heat gains and losses, produce daylight calculations and assess the environmental performance of a building.
Simulation programs are used to produce a 3D model of the building using actual weather and solar data for the building’s specific location which is orientation accurate. A multitude of details are input into the software including, but not limited to, building fabric, mechanical and electrical services, zonal activities, occupancy periods and HVAC schedules. Yearlong simulations are then undertaken on a room-by-room basis to calculate the building performance which can then be used for the analysis of the building.
For Thermal Modelling, this provides the ability to compare the simulated results against project specific criteria designed to limit overheating. Thermal Modelling is used to assess both commercial and residential developments.
Whilst SAP and SBEM are great tools for carrying out simulations to show compliance with Part L, it is very limited in its use. DSM allows for greater analysis on solar gains, energy consumption, gains and losses, the effects of shading from external sources and the overall ability to input details on a more project specific basis.
Thermal Modelling can be used to produce and accurately investigate the following building characteristics:
The UK government recently introduced Part O to the building regulations which focuses on overheating in residential dwellings. DSM and Thermal Modelling can be used to demonstrate compliance with the new regulations which come into force in June 2022.
Under the regulations, you are required to make reasonable provision to:
Compliance with this can be demonstrated with The Simplified Method set out in Section 1 of Approved Document O. If this fails, you will be required to carry out The Dynamic Thermal Modelling Method as set out in Section 2 of Approved Document O. This is a service we can provide for you.
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SAM LYSIAK, TECHNICAL CO-ORDINATOR, KIER
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