Energy simulation programs

Energy simulation programs mainly model energy conservation in buildings, including losses (transmission, ventilation and infiltration losses).

Two modelling techniques are mainly used in simulation programs: analytical methods – the response function method-, and numerical methods. The response factor method solves linear differential equations that include time invariant parameters while numerical methods can handle nonlinear, time varying equation systems. In general numerical methods are preferred although the analytical programs based on the response function method are easier to validate.

Examples of energy simulation programs are: DOE-2, the Engineering Model –EM, ESP-r, EnergyPlus and FRES. In addition, several hybrid methods have been also developed, as combinations of statistical analyses and simulation programs.

Published August 3, 2012

Contact: Gerd Kjølle, SINTEF Energy Research