An estimation of exergy consumption paterns of energy-intensive building service systems

Abstract

This paper represents the estimation of life cycle exergy consumption for building service systems (BSS). The investigation explores public building engineering systems, which are the most energy-intensive. These include heating, ventilating and lightning. The exergy consumption analysis is divided into three parts; systems production, operating and maintenance (O&M) and decommissioning. The differences between them consist in different exergy demand and consumption intensiveness. The main attention is paid to BSS O&M investigation by categorising and defining exergy demands within the building. Exergy consumption for BSS O&M period is estimated as certain amount of exergy that should be supplied to the buildings boundaries. In this investigation of building engineering systems, 4 typical buildings are explored for the Vilnius' city conditions in Lithuania.