A Conceptual/Simplified Building Energy Modelling
Simple tool intended to help architects at the early design stage. Not all info is needed. The architect may focus on losses through walls, windows & balconies (thermal bridges) and gains from windows only, which have the highest impact & are more directly related to the architectural design. It may be used to model a typical floor in a multi-storey building, where the roof & ground have a negligible impact.(Free to use at your own risk. No reproduction without permission)
Building location:
Enter treated floor area:
Treated floor area in meters square
Enter walls info:
Walls area in meters square and R-Value in metric (RSI-Value=R-Value/5.678). Group walls of similar/same properties
Enter windows info:
Area in meters square and U-Value in metric (USI-Value=U-Value*5.678). The rest of the info applies to solar gains (Solar Heat Gain Coefficient (SHG), glazing fraction, reduction from shading, angle, dirt and orientation). Group windows of similar/same properties
Enter balconies info:
Length in meters and linear transmittance, PSI-Value, in metric (W/(mK)). Group balconies of similar/same properties
Enter ventilation info:
Volume of ventilated areas in meters cubic and energetically effective air changes (volume fraction per hour)
Enter internal gains info:
Area in meters square and gains (generated by people, equipment & lighting) in W/m2 (typical residential = 2.1)
Enter other thermal energy needs (DHW etc.):
Thermal energy needs in kWh/year.
Results:
Breakdown of losses and gains:
For questions and/or customized software: Email