Document Type

Theses, Masters


Available under a Creative Commons Attribution Non-Commercial Share Alike 4.0 International Licence

Publication Details

Technological University Dublin, 2008


The aim of this thesis was to investigate the ability of a dynamic and a quasi-steady state calculation methodology to capture the heating and cooling aspects of a buildings energy performance in the context of the requirements of the EU Energy Performance of Buildings Directive (EPBD). Chapters 1 and 2 provide a general background review and description of the implementation of the directive’s requirements in Ireland. Chapter 3 established the usefulness and relevance of building energy benchmarks, traditional approaches to building energy performance calculation methodologies. Chapter 4 established the ability of a sample of simplified and dynamic calculation tools to deal with the requirements set out in the directive and the extent the requirements are dealt with. This investigation observed that the underlying calculations and assumptions vary across different calculation tools; resulting in a variety of energy performance solutions. Chapter 5 investigated the ability of a dynamic methodology (IES) and simplified quasi-steady state methodology (SBEM/ prEN 13790) to capture the effects of variation of key parameters of a building design in order to generate an improvement in energy performance. The investigation analysed the sensitivity of both methodologies to the variation of design parameters and their effect in terms of the annual energy performance calculation. In addition, the calculation algorithms of both IES and SBEM were summarised and analysed to account for the difference in results obtained. This investigation established that a dynamic methodology rewards design improvements with greater magnitude than a quasi-steady state methodology.