HI-85-01-1 -- Computer Modeling of the Thermal Performance of Roof Deck Systems PDF

The use of computer simulation models to estimate the energy performance of systems, subsystems, and components is an accepted and established design research methodology. In architectural and engineering practices, computer simulation models are also used in the evaluation and selection of design choices for building envelope materials and HVAC systems. Higher confidence levels can be placed on the results of these simulation models if the model is verified with in-situ measured data.

This paper describes application of the DOE-2.1A Energy Analysis Program to evaluate the thermal performance of a lightweight insulting concrete roofdeck system (subsequently referred to as LIC). The output of the DOE-2.1A analysis -- in particular, heat flux through an LIC roof -- was compared with the in-situ data of the same roofdeck. This analysis includes the development of the model input parameters based on building construction and operational characteristics, as well as field-measured key variables, the preparation of a custom weather data set, and the execution of the program.

Units: Dual